CN111206265B - Air-water circulating system and multifunctional water electrolysis device thereof - Google Patents
Air-water circulating system and multifunctional water electrolysis device thereof Download PDFInfo
- Publication number
- CN111206265B CN111206265B CN201811391347.8A CN201811391347A CN111206265B CN 111206265 B CN111206265 B CN 111206265B CN 201811391347 A CN201811391347 A CN 201811391347A CN 111206265 B CN111206265 B CN 111206265B
- Authority
- CN
- China
- Prior art keywords
- catalyst layer
- anode
- cathode
- operating voltage
- exchange membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/13—Ozone
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
- C25B11/093—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a gas-water circulating system and a multifunctional water electrolysis device thereof. The multifunctional water electrolysis device comprises a proton exchange membrane, an anode and a cathode, wherein the anode comprises an anode catalyst layer formed on one side of the proton exchange membrane, the anode catalyst layer comprises lead dioxide and iridium dioxide, and the cathode comprises a cathode catalyst layer formed on the opposite side of the proton exchange membrane. Therefore, the multifunctional water electrolysis device can respectively generate ozone, oxygen and hydrogen under different operating voltages.
Description
Technical Field
The invention relates to an electrolytic device, in particular to a proton exchange membrane type multifunctional water electrolysis device and a gas-water circulation system using the same.
Background
According to the characteristics of strong bactericidal power, no residual pollution and the like of ozone, the ozone is widely applied to the fields of food preservation, medical treatment, water treatment and the like. The ozone generation method mainly includes PEM (proton Exchange membrane) water electrolysis, ultraviolet method and high-voltage discharge method, wherein the former method only needs to provide direct current voltage and pure water to obtain high-concentration ozone, and the latter two methods are gradually replaced by PEM water electrolysis recently because the concentration of the obtained ozone is low and can generate byproducts harmful to human bodies.
In addition, hydrogen is one of the globally recognized ideal Energy carriers (Energy carriers), which can be produced from renewable Energy sources and is almost pollution-free when used. It is now known that steam hydrocarbon or alcohol reforming processes can be used to produce hydrogen on a large scale, and nevertheless, there is a pressing need to develop low cost hydrogen production techniques. PEM hydro-electrolysis can directly decompose water into hydrogen and oxygen and the energy required for it can be obtained from renewable energy sources (such as solar energy), and thus there is increasing research interest in using PEM hydro-electrolysis to produce hydrogen.
In the prior art, most researches on the PEM water electrolysis technology are membrane electrode assemblies, and the membrane electrode assembly comprises an anode, an electrolyte and a cathode, wherein the anode material is the most critical. There are a great variety of anode materials that can be used in terms of ozone generation, such as tin antimony Nickel Alloy (NATO), glassy carbon, lead dioxide, platinum tantalum oxide, boron doped diamond, etc., and the studies by m.paidar et al (m.paidar, v.fateev, k.bouzek, "Membrane electrolysis-History, current status and permanent", electrochemical Acta,209(2016) 737-. Lead dioxide formed by electrochemical reaction can be classified into α -PbO2 and β -PbO2 according to their crystal phases, which depend on the composition and temperature in the electrodeposition bath, and α -PbO2 is relatively stable, although it has low conductivity and electrochemical activity, and is preferable for ozone generation.
However, lead dioxide belongs to the ceramic class, the texture of which is very brittle, and the lead dioxide electrode is easily damaged once the operation is improper, and the solution is to form an Anchor (Anchor) between the lead dioxide and the substrate to reduce the brittleness. In addition, lead dioxide is susceptible to degradation resulting in a decrease in electrochemical activity, in other words, lead dioxide has an unsatisfactory operating life. In addition, lead dioxide requires a higher voltage to generate ozone and is not conductive enough to recover after power failure due to the influence of materials and kinetics. In addition, although lead dioxide can produce ozone at high voltage, it cannot operate in low voltage operating environment.
Disclosure of Invention
The invention provides a multifunctional water electrolysis device aiming at overcoming the limitation of the anode based on lead dioxide in use and provides a gas-water circulation system using the multifunctional water electrolysis device.
In order to solve the above technical problems, one of the technical solutions adopted by the present invention is: a multi-functional water electrolysis device comprises a proton exchange membrane, an anode and a cathode. The anode comprises an anode catalyst layer formed on one side of the proton exchange membrane, wherein the anode catalyst layer comprises lead dioxide and iridium dioxide, and the cathode comprises a cathode catalyst layer formed on the opposite side of the proton exchange membrane. The anode can generate ozone under the action of the anode catalyst layer under a first operating voltage, and the cathode can generate oxygen under the action of the anode catalyst layer under a second operating voltage, wherein the second operating voltage is lower than the first operating voltage.
In order to solve the above technical problem, another technical solution adopted by the present invention is: a gas-water circulation system, comprising: a multifunctional water electrolysis device, a power supply and a control unit. The multifunctional water electrolysis device comprises a proton exchange membrane, an anode and a cathode, wherein the anode comprises an anode catalyst layer formed on one side of the proton exchange membrane, the anode catalyst layer comprises lead dioxide and iridium dioxide, and the cathode comprises a cathode catalyst layer formed on the opposite side of the proton exchange membrane. The power supply is electrically connected to the multifunctional water electrolysis device. The control unit is electrically connected to the power supply to control the power supply to output a first operating voltage or a second operating voltage to the multifunctional water electrolysis device, wherein the second operating voltage is lower than the first operating voltage. The anode can generate ozone under the action of the anode catalyst layer under a first operating voltage, and the cathode can generate oxygen under the action of the anode catalyst layer under a second operating voltage, wherein the second operating voltage is lower than the first operating voltage.
The gas-water circulation system and the multifunctional water electrolysis device thereof have the beneficial effects that ozone and a large amount of hydrogen can be respectively generated under high and low voltages through the technical scheme that the anode catalyst layer comprises lead dioxide and iridium dioxide.
Furthermore, the iridium dioxide in the anode catalyst layer has a high electrochemical activity, which promotes the catalytic ability of the lead dioxide in the anode catalyst layer to reduce the voltage required for the electrolysis of water to generate ozone.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic structural view of a multi-functional water electrolysis apparatus according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a membrane electrode assembly according to a first embodiment of the present invention.
FIG. 3 is a structural diagram of a MEA according to a second embodiment of the present invention.
FIG. 4 is a schematic structural view of a MEA according to a third embodiment of the present invention.
FIG. 5 is a schematic view of an internal structure of an anode of a MEA according to a third embodiment of the present invention.
FIG. 6 is a schematic view of another internal structure of an anode of a MEA according to a third embodiment of the present invention.
FIG. 7 is a schematic diagram of a gas-water circulation system according to the present invention.
Detailed Description
The following is a description of the embodiments of the present invention relating to a gas-water circulation system and a multi-functional water electrolysis device thereof, with reference to specific embodiments, and those skilled in the art will understand the advantages and effects of the present invention from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
First embodiment
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a multifunctional water electrolysis device according to a first embodiment of the present invention, and fig. 2 is a schematic structural diagram of a membrane electrode assembly according to the first embodiment of the present invention. The multifunctional water electrolysis device 1 is a Proton Exchange Membrane (PEM) water electrolysis device, and mainly includes a proton exchange membrane 11, an anode 12 and a cathode 13, wherein the proton exchange membrane 11, the anode 12 and the cathode 13 form a membrane electrode assembly, the anode 12 is disposed on one side of the proton exchange membrane 11, and the cathode 13 is disposed on the opposite side of the proton exchange membrane 11.
The proton exchange membrane 11 is a solid electrolyte polymer membrane (such as a perfluorosulfonic acid membrane), and the proton exchange membrane 11 can transmit protons (such as hydrogen ions H +) and block gas and electrons. The anode 12 employs an anode catalyst layer formed on the first surface 11a of the proton exchange membrane 11, wherein the composition of the anode 12 mainly includes lead dioxide (PbO2) and iridium dioxide (IrO 2). The cathode 13 mainly includes a cathode catalyst layer 131, the cathode catalyst layer 131 is formed on the second surface 12b of the proton exchange membrane 11, wherein the cathode catalyst layer 131 mainly includes Pt/C (platinum catalyst supported on carbon).
Further, the anode 12 (anode catalyst layer) includes a first catalyst layer 121 and a second catalyst layer 122, the first catalyst layer 121 is formed on the first surface 11a of the proton exchange membrane 11, wherein the first catalyst layer 121 mainly includes a polymer material, a carbon carrier and lead dioxide, the second catalyst layer 122 is formed on the first catalyst layer 121, and the second catalyst layer 122 mainly includes a polymer material, a carbon carrier and iridium dioxide. In this embodiment, the polymer material may be perfluorosulfonic acid polymer, and the carbon support may be one or a combination of two or more of carbon nanotubes, graphene, graphite and carbon black. However, the present invention is not limited to the above-mentioned examples.
The cathode 13 may be a Gas Diffusion Electrode (GDE), the cathode 13 further includes a microporous layer 132 and a support substrate 133, the cathode catalyst layer 131 is formed on the microporous layer 132, and the microporous layer 132 is formed on the support substrate 133. In the present embodiment, the microporous layer 132 may be formed of carbon powder or carbon tubes, and the supporting substrate 133 may be formed of carbon paper or carbon cloth. However, the present invention is not limited to the above-mentioned examples.
In the present embodiment, the composition of the first catalyst layer 121 mainly includes lead dioxide and perfluorosulfonic acid polymer, and the composition of the second catalyst layer 122 mainly includes iridium dioxide and perfluorosulfonic acid polymer. Further, the first catalyst layer 121 may be formed on a transfer substrate by first mixing and homogenizing lead dioxide powder, perfluorosulfonic acid polymer solution (Nafion solution) and at least one additive according to a specific ratio, then drying and molding at a suitable temperature (for example, drying at 90 ℃ for 50 minutes), and then coating. The second catalyst layer 122 may be formed on another transfer substrate by first forming an iridium dioxide dispersion solution by ultrasonic oscillation with iridium dioxide powder, a perfluorosulfonic acid polymer solution and at least one additive in a specific ratio, then uniformly stirring the iridium dioxide dispersion solution, and then spraying the iridium dioxide dispersion solution on another transfer substrate. The additive in the first catalyst layer 121 may be a catalyst for assisting ozone generation, and the additive in the second catalyst layer 122 may be a catalyst for assisting oxygen generation, but the invention is not limited thereto.
Finally, the first catalyst layer 121, the second catalyst layer 122, the cathode catalyst layer 131, the microporous layer 132 and the carrier substrate 133 can be combined with the proton exchange membrane 11 by hot pressing under 125 ℃ for 2 minutes, wherein the first catalyst layer 121 and the second catalyst layer 122 are formed on the first surface 11a, and the cathode catalyst layer 131, the microporous layer 132 and the carrier substrate 133 are formed on the second surface 12 b.
It should be noted that, because the anode 12 uses both lead dioxide and iridium dioxide, wherein the weight ratio of lead dioxide to iridium dioxide in the anode 12 is 1:9-9:1, preferably 9:1, the multifunctional water electrolysis device 1 can generate ozone and a large amount of hydrogen at high and low voltages, respectively. Further, when a first operating voltage is applied to the multi-functional water electrolysis apparatus 1, the first operating voltage is between 3.5V and 5V, so that the anode 12 reacts under the catalysis of the first catalyst layer 121 containing lead dioxide to generate ozone, the half reaction of which is shown in formula (1), and the cathode 13 reacts under the catalysis of the cathode catalyst layer 131 to generate hydrogen and oxygen, the half reaction of which is shown in formula (2).
3H2O→O3+6H++6e-Formula (1)
6H++6e-→3H2Formula (2)
In addition, when a second operation voltage is applied to the multi-functional water electrolysis apparatus 1, the second operation voltage is between 1.8V and 3V, so that the anode 12 reacts under the catalysis of the second catalyst layer 122 containing iridium dioxide to generate oxygen, the half reaction of which is shown in formula (3), and the cathode 13 reacts under the catalysis of the cathode catalyst layer 131 to generate hydrogen and oxygen, the half reaction of which is also shown in formula (4).
2H2O→O2+4H++4e-Formula (3)
4H++4e-→2H2Formula (4)
It should be noted that although the cathode 13 can generate hydrogen gas by reaction at both the first operating voltage and the second operating voltage, the amount of hydrogen gas generated at the first operating voltage is greater than that generated at the second operating voltage because the reaction rate is positively correlated with the voltage.
Furthermore, iridium dioxide in second catalyst layer 122 has high electrochemical activity, which can promote the activity of lead dioxide in first catalyst layer 121, and therefore, the voltage required for water electrolysis to generate ozone (i.e., the first operating voltage) can be reduced. In addition, under the configuration that the first catalyst layer 121 and the second catalyst layer 122 are disposed inside and outside, the second catalyst layer 122 can protect the first catalyst layer 121, prevent the first catalyst layer 121 from cracking during operation, prevent the first catalyst layer 121 from being corroded due to the high corrosion resistance of iridium dioxide, and effectively reduce the probability of oxidation of lead dioxide in the first catalyst layer 121.
Referring to fig. 1 again, in addition to the membrane electrode assembly formed by the proton exchange membrane 11, the anode 12 and the cathode 13, the multifunctional water electrolysis apparatus 1 further includes anode and cathode current collectors (current collectors) 14a and 14b, anode and cathode flow field plates (field flow plates) 15a and 15b, anode and cathode end plates 16a and 16b (end plates), and a sealing assembly 17, wherein the anode current collector 14a, the anode flow field plate 15a and the anode end plate 16a are located on the same side as the anode 12, and the cathode current collector 14b, the cathode flow field plate 15b and the cathode end plate 16b are located on the same side as the cathode 13. A seal assembly 17 surrounds the mea.
In the present embodiment, the anode and cathode current collectors 14a, 14b may be water-permeable metal structures with electrocatalytically-active particles, which may be porous metal sheets, metal meshes, or metal felts, but the present invention is not limited thereto. The anode and cathode current collectors 14a, 14b may be used in conjunction with a Polytetrafluoroethylene (PTFE) membrane, for example, by embedding the anode and cathode current collectors 14a, 14b in the PTFE membrane.
The anode and cathode flow field plates 15a, 15b are electrically conductive and gas tight, wherein the material of the anode flow field plate 15a may be titanium plated stainless steel and the material of the cathode flow field plate 15b may be stainless steel, but the invention is not limited thereto. The anode and cathode end plates 16a, 16b are provided at the outermost side of the apparatus, have a water collecting function, and can maintain a fixed and uniform pressure inside the apparatus, thereby stabilizing the internal reaction.
Second embodiment
Referring to fig. 3, the present embodiment provides a multi-functional water electrolysis apparatus 1, which mainly includes a proton exchange membrane 11, an anode 12 and a cathode 13, wherein the anode 12 is disposed on one side of the proton exchange membrane 11, and the cathode 13 is disposed on the opposite side of the proton exchange membrane 11. The main difference between this embodiment and the first embodiment is: the first catalyst layer 121 and the second catalyst layer 122 of the anode 12 are formed in parallel on the proton exchange membrane 11. In this configuration, the anode 12 can also generate ozone through the catalytic reaction of the first catalyst layer 121 containing lead dioxide at the first operating voltage; alternatively, the anode 12 may generate oxygen by the catalytic reaction of the second catalyst layer 122 containing iridium dioxide at the second operating voltage, and the cathode 13 may generate a large amount of hydrogen and oxygen by the catalytic reaction of the cathode catalyst layer 131 at the second operating voltage. The technical details of the first catalyst layer 121 and the second catalyst layer 122 can be found in the previous embodiments, and thus are not described in detail herein.
Third embodiment
Referring to fig. 4 to 6, the present embodiment provides a multi-functional water electrolysis apparatus 1, which mainly includes a proton exchange membrane 11, an anode 12 and a cathode 13, wherein the anode 12 is disposed on one side of the proton exchange membrane 11, and the cathode 13 is disposed on the opposite side of the proton exchange membrane 11. The main difference between this embodiment and the previous embodiment is: the anode 12 has a plurality of uniformly dispersed catalyst units 123 composed of a carbon support, iridium dioxide and lead dioxide. Under this configuration, the anode 12 can also generate ozone through the catalytic reaction of the lead dioxide on the catalyst units 123 under the first operating voltage; alternatively, the anode 12 may generate oxygen through the catalytic reaction of iridium dioxide on these catalyst units 123 at the second operating voltage, and the cathode 13 may generate a large amount of hydrogen and oxygen through the catalytic reaction of the cathode catalyst layer 131 at the second operating voltage.
Further, each catalyst unit 123 includes a core portion 1231 and an outer cover portion 1232a, 1232b, and the outer cover portions 1232a, 1232b may be supported on the core portion 1231 continuously or in a dispersed form. The core portion 1231 is formed of a carbon support and the outer cover portions 1232a, 1232b are formed of iridium dioxide and lead dioxide, in other words, the iridium dioxide and lead dioxide are chemically bonded to the carbon support. The carbon support may use one or a combination of two or more of carbon nanotubes, graphene, graphite, and carbon black, but the present invention is not limited thereto.
Fourth embodiment
Referring to fig. 7, the present embodiment provides a gas-water circulation system S, which mainly includes a multifunctional water electrolysis device 1, a power supply 2 and a control unit 3. The multifunctional water electrolysis apparatus 1 may adopt the architecture of the foregoing embodiment, and mainly includes a proton exchange membrane 11, an anode 12 and a cathode 13, wherein the anode 12 is disposed on one side of the proton exchange membrane 11, and the cathode 13 is disposed on the opposite side of the proton exchange membrane 11. The power supply 2 is electrically connected to the anode 12 and the cathode 13 of the multi-functional water electrolysis apparatus 1 to form an electrical circuit. The control unit 3 is electrically connected to the power supply 2, and when water electrolysis is performed, the control unit 3 can control the power supply 2 to output a first operating voltage or a second operating voltage to the multi-functional water electrolysis apparatus 1, wherein the second operating voltage is lower than the first operating voltage.
The gas-water circulation system S may have two operation modes, wherein one operation mode is that the power supply 2 outputs a first operation voltage to the multi-functional water electrolysis device 1, the first operation voltage is between 3V and 5V, and the anode 12 of the multi-functional water electrolysis device 1 reacts to generate ozone. In another mode of operation, the power supply 2 outputs a second operating voltage to the multi-functional water electrolysis apparatus 1, the second operating voltage being between 1.8V and 3V, such that the anode 12 of the multi-functional water electrolysis apparatus 1 reacts to generate oxygen while the cathode 13 reacts to generate a large amount of hydrogen.
The gas-water circulation system S may further include a first gas-liquid mixing device 4, a second gas-liquid mixing device 5, and a pure water device 6, wherein the first gas-liquid mixing device 4 is connected to the multifunctional water electrolysis device 1 through a first pipeline P1, the second gas-liquid mixing device 5 is connected to the multifunctional water electrolysis device 1 through a second pipeline P2, the pure water device 6 supplies pure water to the multifunctional water electrolysis device 1, the first gas-liquid mixing device 4, and the second gas-liquid mixing device 5 through a water inlet pipeline P3, and the pure water device 6 may be an ion exchange pure water device, but the invention is not limited thereto.
When the multi-functional water electrolysis apparatus 1 performs water electrolysis at the first operating voltage, ozone generated by the anode 12 may enter the first gas-liquid mixing apparatus 4 through the first pipe P1 and be dissolved in pure water under a suitable pressure to form ozone water. When the multi-functional water electrolysis apparatus 1 performs water electrolysis at the second operation voltage, oxygen generated from the anode 12 may enter the first gas-liquid mixing device 4 through the first line P1 and be dissolved in pure water at an appropriate pressure to form oxygen-enriched water, and hydrogen generated from the cathode 13 may enter the second gas-liquid mixing device 5 through the second line P2 and be dissolved in pure water at an appropriate pressure to form hydrogen-enriched water.
It should be noted that in the gas-water circulation system S, the first gas-liquid mixing device 4 can be respectively connected to the first pipeline P1, the second pipeline P2 and the water inlet pipeline P3 through the circulation pipeline P4. Therefore, after the gas-water circulation system S is used for a period of time, the ozone water formed in the first gas-liquid mixing device 4 can be flushed back to the first pipeline P1, the second pipeline P2 and the water inlet pipeline P3 by the circulation pipeline P4 for sterilization and disinfection.
Advantageous effects of the embodiments
The gas-water circulation system and the multifunctional water electrolysis device thereof have the beneficial effects that ozone and a large amount of hydrogen can be respectively generated under high and low voltages through the technical scheme that the anode catalyst layer comprises lead dioxide and iridium dioxide.
Furthermore, the iridium dioxide in the anode catalyst layer has a high electrochemical activity, which promotes the catalytic ability of the lead dioxide in the anode catalyst layer to reduce the voltage required for the electrolysis of water to generate ozone.
More specifically, the anode catalyst layer may include a first catalyst layer and a second catalyst layer disposed inside and outside, wherein the first catalyst layer contains lead dioxide and the second catalyst layer contains iridium dioxide. Therefore, the second catalyst layer can protect the first catalyst layer, the first catalyst layer is prevented from being damaged in the operation process, the first catalyst layer can be prevented from being corroded through the high corrosion resistance of the iridium dioxide, and the probability of oxidation of the lead dioxide in the first catalyst layer can be effectively reduced.
The disclosure is only a preferred embodiment of the invention and should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (7)
1. A multi-functional water electrolysis apparatus, characterized in that it comprises:
a proton exchange membrane;
the anode comprises an anode catalyst layer formed on one side of the proton exchange membrane, wherein the anode catalyst layer comprises a first catalyst layer and a second catalyst layer, the first catalyst layer is formed on the proton exchange membrane and comprises a carbon carrier and lead dioxide, the second catalyst layer is formed on the first catalyst layer and comprises the carbon carrier and iridium dioxide, and the weight ratio of the lead dioxide to the iridium dioxide is 1:9-9: 1; and
a cathode including a cathode catalyst layer formed on the opposite side of the proton exchange membrane;
the anode can generate ozone under the action of the anode catalyst layer under a first operating voltage, and the cathode can generate oxygen under the action of the anode catalyst layer under a second operating voltage, wherein the second operating voltage is lower than the first operating voltage.
2. The multi-functional water electrolysis device according to claim 1, wherein the cathode catalyst layer is formed on the proton exchange membrane, and the composition of the cathode catalyst layer comprises Pt/C.
3. The multi-functional water electrolysis apparatus according to claim 2, wherein said cathode further comprises a microporous layer and a support substrate, said cathode catalyst layer being formed on said microporous layer, and said microporous layer being formed on said support substrate.
4. The utility model provides a gas water circulating system which characterized in that, gas water circulating system includes:
a multi-functional water electrolysis apparatus, comprising:
a proton exchange membrane;
the anode comprises an anode catalyst layer formed on one side of the proton exchange membrane, wherein the anode catalyst layer comprises a first catalyst layer and a second catalyst layer, the first catalyst layer is formed on the proton exchange membrane and comprises a carbon carrier and lead dioxide, the second catalyst layer is formed on the first catalyst layer and comprises the carbon carrier and iridium dioxide, and the weight ratio of the lead dioxide to the iridium dioxide is 1:9-9: 1; and
a cathode including a cathode catalyst layer formed on the opposite side of the proton exchange membrane;
the power supply is electrically connected with the multifunctional water electrolysis device;
the control unit is electrically connected with the power supply to control the power supply to output a first operating voltage or a second operating voltage to the multifunctional water electrolysis device, wherein the second operating voltage is lower than the first operating voltage;
the anode can generate ozone under the action of the anode catalyst layer under a first operating voltage, and the cathode can generate oxygen under the action of the anode catalyst layer under a second operating voltage, wherein the second operating voltage is lower than the first operating voltage.
5. The gas-water circulation system according to claim 4, wherein the cathode catalyst layer is formed on the proton exchange membrane, and the composition of the cathode catalyst layer comprises Pt/C.
6. The gas-water circulation system according to claim 5, wherein the cathode further comprises a microporous layer and a support substrate, the cathode catalyst layer is formed on the microporous layer, and the microporous layer is formed on the support substrate.
7. The gas-water circulation system according to claim 4, wherein the first operating voltage is between 3.5V and 5V, and the first operating voltage is between 1.8V and 3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391347.8A CN111206265B (en) | 2018-11-21 | 2018-11-21 | Air-water circulating system and multifunctional water electrolysis device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391347.8A CN111206265B (en) | 2018-11-21 | 2018-11-21 | Air-water circulating system and multifunctional water electrolysis device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111206265A CN111206265A (en) | 2020-05-29 |
| CN111206265B true CN111206265B (en) | 2021-06-04 |
Family
ID=70785277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811391347.8A Expired - Fee Related CN111206265B (en) | 2018-11-21 | 2018-11-21 | Air-water circulating system and multifunctional water electrolysis device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111206265B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435512A (en) * | 2002-01-30 | 2003-08-13 | 友昕科技股份有限公司 | Ozone producing electrolyzer |
| EP1340841A1 (en) * | 2002-02-06 | 2003-09-03 | Luxon Energy Devices Corporation | Electrolytic cell for ozone generation |
| CN2591049Y (en) * | 2002-12-27 | 2003-12-10 | 余建平 | Ozone & oxygen generator |
| CN101942668A (en) * | 2008-10-06 | 2011-01-12 | 氯工程公司 | Operation method of ozonizer and ozonizer apparatus used therefor |
| CN201746592U (en) * | 2010-06-22 | 2011-02-16 | 刘迅 | Water electrolysis device |
| JP2011214119A (en) * | 2010-04-01 | 2011-10-27 | Miike Iron Works Co Ltd | Electrolytic method and electrolyzer |
| TW201504476A (en) * | 2013-07-17 | 2015-02-01 | Univ Yuan Ze | Ozone generating system by water electrolysis and ozone producing device thereof |
| CN107510591A (en) * | 2016-06-17 | 2017-12-26 | 元智大学 | Medical gas and liquid supply system |
-
2018
- 2018-11-21 CN CN201811391347.8A patent/CN111206265B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435512A (en) * | 2002-01-30 | 2003-08-13 | 友昕科技股份有限公司 | Ozone producing electrolyzer |
| EP1340841A1 (en) * | 2002-02-06 | 2003-09-03 | Luxon Energy Devices Corporation | Electrolytic cell for ozone generation |
| CN2591049Y (en) * | 2002-12-27 | 2003-12-10 | 余建平 | Ozone & oxygen generator |
| CN101942668A (en) * | 2008-10-06 | 2011-01-12 | 氯工程公司 | Operation method of ozonizer and ozonizer apparatus used therefor |
| JP2011214119A (en) * | 2010-04-01 | 2011-10-27 | Miike Iron Works Co Ltd | Electrolytic method and electrolyzer |
| CN201746592U (en) * | 2010-06-22 | 2011-02-16 | 刘迅 | Water electrolysis device |
| TW201504476A (en) * | 2013-07-17 | 2015-02-01 | Univ Yuan Ze | Ozone generating system by water electrolysis and ozone producing device thereof |
| CN107510591A (en) * | 2016-06-17 | 2017-12-26 | 元智大学 | Medical gas and liquid supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111206265A (en) | 2020-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liang et al. | Electrolytic cell design for electrochemical CO2 reduction | |
| Liu et al. | Efficiency and stability of hydrogen production from seawater using solid oxide electrolysis cells | |
| Lobyntseva et al. | Electrochemical synthesis of hydrogen peroxide: Rotating disk electrode and fuel cell studies | |
| Huskinson et al. | A high power density, high efficiency hydrogen–chlorine regenerative fuel cell with a low precious metal content catalyst | |
| CN109321936B (en) | Device and method for producing hydrogen by electrolyzing water step by step based on liquid flow redox medium | |
| CN107858701B (en) | A kind of titanium-based hydrogen-precipitating electrode and preparation method thereof for solid polymer water electrolyzer | |
| KR101220199B1 (en) | Electrolytic synthesis of hydrogen peroxide directly from water and application thereof | |
| CN103820807A (en) | Device and method for producing hydrogen and generating electricity | |
| WO2015122125A1 (en) | Microbial fuel cell, microbial fuel cell system, and method for using microbial fuel cell | |
| Chisholm et al. | Decoupled electrolysis using a silicotungstic acid electron-coupled-proton buffer in a proton exchange membrane cell | |
| US20170271697A1 (en) | Membrane electrode assembly, and electrochemical cell and electrochemical stack using same | |
| Wang et al. | Electricity and hydrogen co-production from a bio-electrochemical cell with acetate substrate | |
| CN101325266B (en) | Power supply system for minisize composite regenerative fuel battery | |
| Lehner et al. | Water electrolysis | |
| Stojić et al. | A comparison of alkaline and proton exchange membrane electrolyzers | |
| CN108258267A (en) | A kind of acid cathode-alkali anode low temperature alcohol fuel battery | |
| CN111206265B (en) | Air-water circulating system and multifunctional water electrolysis device thereof | |
| TWI682068B (en) | Liquid-gas cycling system and multifunctional water electrolysis device | |
| CN213570766U (en) | Water decomposition hydrogen production device based on lead net | |
| Wang et al. | Evaluation of low-cost cathode catalysts for high yield biohydrogen production in microbial electrolysis cell | |
| KR102260935B1 (en) | High efficiency unitized regenerative fuel cell based on polymer electrolyte membrane, method of operating the same, and method of manufacturing the same | |
| CN108383214B (en) | Photovoltaic electro-catalysis organic wastewater treatment reactor and anode preparation method thereof | |
| JP6991893B2 (en) | Carbon dioxide reduction method and carbon dioxide reduction device | |
| Peng | Alkaline Water Electrolysis | |
| CN113416972A (en) | Device and method for producing hydrogen by electrolyzing water step by step based on all-vanadium liquid flow redox medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210604 Termination date: 20211121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |