CN117468033A - Proton exchange membrane water electrolysis catalyst and synthesis method thereof - Google Patents
Proton exchange membrane water electrolysis catalyst and synthesis method thereof Download PDFInfo
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- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- DKNJHLHLMWHWOI-UHFFFAOYSA-L ruthenium(2+);sulfate Chemical compound [Ru+2].[O-]S([O-])(=O)=O DKNJHLHLMWHWOI-UHFFFAOYSA-L 0.000 claims description 3
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- 229910052739 hydrogen Inorganic materials 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 14
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- 229910052741 iridium Inorganic materials 0.000 description 12
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 11
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- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 2
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- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 1
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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
- 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
-
- 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
- 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
- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
- C25B11/065—Carbon
-
- 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
Abstract
The invention belongs to the technical field of electrochemical catalysis, and discloses a proton exchange membrane water electrolysis catalyst and a synthesis method thereof, ru 1‑ x Zr x O 2 (0<x<1) The catalyst shows high activity under acidic condition, 10mA/cm 2 The overpotential of the current density of (2) was 170mV. Accurately weighing and mixing the raw materials; the mixture was charged into a 100 ml polytetrafluoroethylene-lined autoclave; after 2 hours of magnetic stirring, the autoclave was sealed and maintained at 140 degrees celsius for 20 hours and then cooled to room temperature; the product was collected by centrifugation, washed with absolute ethanol and distilled water several times, and finally dried at room temperature. The invention provides a novel electrochemical catalyst specially used for oxygen evolution reaction in an acidic environment, which has excellent activity, conductivity and high electrochemical catalysisCapacity for OER. Ru (Ru) 1‑x Zr x O 2 (0<x<1) Catalysts have significant cost advantages in several respects.
Description
Technical Field
The invention belongs to the technical field of electrochemical catalysis, and particularly relates to a proton exchange membrane water electrolysis catalyst and a synthesis method thereof.
Background
With the increasing market for intermittent renewable energy power generation, hydrogen (H), a representative energy carrier for high energy density and sustainability 2 ) The demand is increasing. Electrocatalytic water splitting to produce hydrogen and oxygen molecules is considered one of the most promising green technologies to alleviate or even address the increasingly severe environmental and energy crisis and therefore has attracted widespread attention. The proton exchange membrane electrolyzer is an excellent path for preparing high-purity green hydrogen by utilizing renewable energy electrolysis water at present due to high energy conversion efficiency, high working current, high hydrogen purity and quick response capability matched with intermittent renewable energy sources. However, one of the main bottlenecks of proton exchange membrane electrolyzers is a water oxidation catalyst having high catalytic activity, high stability and low cost under acidic conditions. Ruthenium (Ru) and iridium (Ir) based materials are currently the most advanced water oxidation catalysts with satisfactory activity under acidic conditions. The development of ruthenium-based catalysts is critical for improving Polymer Electrolyte Membrane (PEM) cells because of better activity and lower cost than iridium-based materials. However, ruthenium-based water oxidation catalysts readily produce soluble RuO when catalytically decomposing water under acidic conditions 4 The rapid decrease in catalyst activity caused by the dissolution of the ions, and ruthenium metal ions, has hindered the commercial use of ruthenium-based water oxidation catalysts.
As described above, the development of an Oxygen Evolution Reaction (OER) electrocatalytic water oxidation catalyst with high activity, high acid resistance and economical efficiency is a major challenge for the direct production of hydrogen from water electrolysis using proton exchange membrane electrolyzer cells. IrO (IrO) 2 Although having good stability and catalytic activity in acidic media, the prohibitively high price makes it difficult to commercialize on a large scale. To overcome this economic limitation, alternative electrocatalysts need to be sought. Thus, development of ruthenium-based water oxidation catalysts with high activity and high stability for proton exchangeThe large-scale application of the membrane-changing electrolytic tank has important significance.
The closest prior art is the use of platinum-based (Pt-based) or iridium-based (Ir-based) catalysts as electrode materials for Proton Exchange Membrane (PEM) electrolyzed water systems.
The prior art comprises the following steps: platinum-based or iridium-based catalyst
Platinum and iridium-based catalysts are widely used in PEM electrolyzed water systems due to their excellent catalytic activity and stability. The noble metal catalysts can greatly improve the water electrolysis efficiency and reduce the required overpotential, thereby improving the energy conversion efficiency of the whole system.
Technical problems:
1. high cost: iridium is a very rare and expensive material, which greatly increases the cost of the electrolyzed water system, especially in large scale applications. The high cost limits the wide range of iridium-based catalysts.
2. Resource scarcity: iridium has a limited reserves and is difficult to meet global large-scale demands, especially in view of the rapid development of renewable energy and hydrogen energy technologies.
3. Long-term stability problem: although iridium-based catalysts exhibit better stability, they also suffer from corrosion or loss of activity under long-term operation and severe conditions.
In view of the above problems, proposed Ru 1-x Zr x O 2 (0<x<1) The catalyst scheme has the following technical advantages:
cost effectiveness: ru (Ru) 1-x Zr x O 2 (0<x<1) The catalyst provides a more economical option because optimizing the activity for a particular application may reduce the reliance on the use of more expensive metals.
Activity and stability: shows high activity under acidic conditions, indicating Ru 1-x Zr x O 2 (0<x<1) The catalyst is expected to realize high-efficiency electrolysis under low overpotential and provide better corrosion resistance than the prior art.
Sustainability: the use of more widely distributed elements reduces reliance on scarce resources, making electrolysis techniques more sustainable.
In summary, although platinum and iridium-based catalysts perform well in proton exchange membrane water electrolysis technology, ru 1-x Zr x O 2 (0<x<1) The catalyst provides a potential solution to the cost and resource limitation problems of the prior art. Further research requires verification of its performance and stability in practical applications.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a proton exchange membrane water electrolysis catalyst and a synthesis method thereof.
In the invention, a novel nano Ru which can be used for a proton exchange membrane electrolytic tank is prepared by a simple hydrothermal method 1-x Zr x O 2 (0<x<1) A water oxidation catalyst. Ru (Ru) 1-x Zr x O 2 (0<x<1) The catalyst showed high activity under acidic conditions, which was 10mA/cm 2 The required overpotential at current density is only 170mV.
Further, ru 1-x Zr x O 2 (0<x<1) The catalyst is synthesized by a hydrothermal method.
A method for synthesizing a proton exchange membrane electrolyzed water catalyst comprises the following steps:
s101, accurately weighing raw materials and mixing the raw materials;
s102, filling the mixture into a polytetrafluoroethylene-lined autoclave with 100 milliliters;
s103, after 2 hours of magnetic stirring, sealing the autoclave, keeping the autoclave at 140-200 ℃ for 2-72 hours, and then cooling the autoclave to room temperature;
s104, centrifugally collecting a product, washing the product with absolute ethyl alcohol and distilled water for multiple times, and finally drying the product at room temperature.
Further, the raw materials are zirconium nitrate, zirconium sulfate, zirconium acetate, ruthenium sulfate and disodium Edetate (EDTANA) 2 )。
Further, the raw material was 0.027 g of Zr (NO) 3 ) 4 . 5H 2 0. 0.14 g Cl 3 H 6 O 3 Ru and 0.1 g EDTANA 2 Is used for preparing the catalyst with optimal catalytic activity.
Another object of the invention is to provide an application of the proton exchange membrane electrolyzed water catalyst in oxygen evolution reaction.
The invention further aims to provide an application of the proton exchange membrane water electrolysis catalyst in the field of water decomposition.
In combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
first, the invention synthesizes a totally new electrochemical water oxidation catalyst Ru in acid electrolyte 1-x Zr x O 2 (0<x<1) The optimized catalyst shows excellent activity in the oxidation reaction of acidic water, and the activity is 10mA/cm 2 The required overpotential at current density is only 170mV. Catalyst Ru 1-x Zr x O 2 (0<x<1) The advantageous cost advantage is maintained, since ruthenium (Ru) and pick (Zr) are significantly more cost-effective than iridium (Ir). Ru (Ru) 1-x Zr x O 2 (0<x<1) The XRD pattern of (c) confirms the tetragonal structure, and the nanoparticles exhibit uniform nanoscale diameters and excellent dispersibility. In addition, the catalyst promotes the orderly conduction of electrons. The preparation process is simple, requires mild conditions, has strong repeatability, and shows excellent catalytic performance in an acidic environment.
The invention synthesizes a brand new high-efficiency low-cost electrocatalyst Ru by adopting a hydrothermal method 1-x Zr x O 2 (0<x<1). The adoption of low-cost materials significantly enhances the affordability and accessibility of oxygen evolution reactions that carry out water decomposition under acidic conditions, making it a subverted technology in this field. The invention has revolutionary potential and can solve the key challenges related to activity and low cost, thereby changing the appearance of hydrogen production by water electrolysis.
The invention provides a feasible way for synthesizing the novel catalyst with good activity, thereby accelerating the development of the novel low-cost, stable and efficient acid OER electrocatalyst.
Second, OER activity: ru (Ru) 1-x Zr x O 2 (0<x<1) A new electrochemical catalyst, especially for Oxygen Evolution Reactions (OER) in acidic environments, which represents an innovative development in the field of water splitting, is based on ruthenium (Ru). Notably, the catalyst exhibited excellent performance at 10mA/cm 2 The required overpotential at current density is only 170mV. This enhanced activity is due to the significant presence of zirconium (Zr) and ruthenium (Ru), which synergistically enhance Ru 1-x Zr x O 2 (0<x<1) OER performance of (c). In addition, the catalyst also exhibits excellent electrical conductivity and high electrochemical catalytic capability for OER.
Cost effective materials: ru (Ru) 1-x Zr x O 2 (0<x<1) Catalysts have significant cost advantages in several respects.
First, ruthenium (Ru) is significantly more economical than iridium (Ir) compared to its counterpart. This cost difference allows the catalysts of the present invention to maintain a competitive advantage in terms of price. In addition, the choice of zirconium (Zr) as the catalyst component contributes to its cost effectiveness. Zirconium is not only easy to obtain in the market, but also has reasonable price. The availability and cost effectiveness of zirconium makes it a practical economic choice for the catalyst composition.
The combination of cost-effective ruthenium and readily available zirconium in the catalyst of the present invention ensures that it not only exhibits excellent electrochemical performance, but is still a cost-effective solution in a variety of applications.
Thirdly, the expected benefits and commercial value after the technical scheme of the invention is converted are as follows: according to the prediction of the China's hydrogen energy alliance, the production value of the China's hydrogen energy industry reaches 1 trillion yuan in 2020 to 2025, the production value reaches 5 trillion yuan in 2026 to 2035, and the hydrogen production yield of China's renewable energy sources reaches 1 hundred million tons in 2060. Therefore, the development of the acid electrolyzed water oxidation catalyst with high efficiency, stability and low cost has wide application market.
Fourth, the nanometer Ru provided by the invention 1-x Zr x O 2 (0<x<1) Preparation method of water oxidation catalyst and application of water oxidation catalyst to proton exchange membrane electrolytic cellThe technical progress is that:
1) High performance catalytic activity: the catalyst showed high activity under acidic conditions, in particular low overpotential (170 mV at 10mA/cm 2 ) Indicating that it has remarkable catalytic efficiency on water oxidation reaction. Such performance appears to provide a highly efficient electrocatalyst for proton exchange membrane electrolyzers, which helps to increase the overall energy efficiency of hydrogen production by electrolysis of water.
2) The simple synthesis method comprises the following steps: the hydrothermal method is adopted for catalyst synthesis, so that the production process is simplified, and the catalyst can be produced in large scale without complex equipment. This method is cost-effective for industrial applications and easily scalable.
3) Low-cost raw materials: zirconium nitrate, zirconium sulfate, zirconium acetate and disodium ethylenediamine tetraacetate are used as raw materials, which are relatively easily available and inexpensive chemicals. This helps to reduce overall catalyst costs compared to other precious metal materials.
4) Environmental protection: due to the hydrothermal method, the synthesis process is more environment-friendly, and the use of harmful solvents and the generation of dangerous wastes are reduced.
5) Controllable synthesis: the nanostructure and the composition of the catalyst can be precisely controlled by adjusting the reaction temperature and the reaction time, thereby realizing the customization of the optimal catalytic activity.
6) Stability is improved: the addition of Zr helps to improve the structural stability of the Ru-based catalyst, thus maintaining catalytic performance in high oxidation environments, which is critical to improving the lifetime of the electrolyzer.
7) Application prospect: due to its excellent performance and low cost, this catalyst can find application not only in proton exchange membrane cells, but also in other types of cells such as alkaline cells and solid oxide cells, contributing to the development of clean energy technology.
Through the advantages, the application of the catalyst in the aspect of hydrogen production by water electrolysis of the proton exchange membrane not only improves the energy conversion efficiency, but also has potential to reduce the cost of the related technology, and has important significance for promoting the sustainable development of hydrogen energy as renewable energy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for synthesizing a proton exchange membrane water electrolysis catalyst provided by an embodiment of the invention;
FIG. 2 is a diagram of Ru provided by an embodiment of the invention 1-x Zr x O 2 (0<x<1) SEM images of (a);
FIG. 3 is a Scanning Electron Microscope (SEM) image of Ru0.90Zr0.10O2 provided by an embodiment of the invention;
FIG. 4 shows Ru according to an embodiment of the present invention 1-x Zr x O 2 (0<x<1) OER activity profile of (a).
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides two specific embodiments and preparation methods thereof:
example 1: hydrothermal synthesis of Ru 1-x Zr x O 2 (0<x<1) Catalyst
1. Preparing a precursor solution: the chemicals containing Ru and Zr are dissolved in a predetermined ratio in a proper amount of water.
2. Mixing evenly: the solution was stirred using a magnetic stirrer to ensure uniform distribution of Ru and Zr.
3. Loading into a reaction kettle: transferring the mixed solution into a high-pressure resistant hydrothermal reaction kettle.
4. Heating and maintaining: the reaction vessel is placed in a heating furnace, heated at a set temperature (e.g., 180 ℃) and maintained for a certain period of time (e.g., 24 hours) to complete the hydrothermal synthesis.
5. Collecting and washing: after the reaction is finished, naturally cooling to room temperature, opening the reaction kettle to take out the product, and alternately washing the product with deionized water and ethanol for several times.
6. And (3) drying: the washed product is placed in an oven and dried at a certain temperature (e.g., 60 ℃) for 12 hours.
7. Calcining: calcining the dried product in air (500 ℃ for example), and adjusting the calcining time according to the requirement to obtain Ru 1-x Zr x O 2 (0<x<1) A catalyst.
Example 2: ru (Ru) 1-x Zr x O 2 (0<x<1) Performance test of catalyst
1. Preparing a test electrode: to be synthesized of Ru 1-x Zr x O 2 (0<x<1) The catalyst is coated on an electrode (e.g., a gas diffusion electrode).
2. Assembling an electrolytic cell: the catalyst coated electrode was placed in a proton exchange membrane water electrolysis device to ensure good contact of the electrode with the membrane.
3. Adjusting experimental conditions: an electrolyte (such as dilute sulfuric acid) is provided to ensure that the water electrolysis device is in an acidic condition.
4. Performance test: linear Sweep Voltammetry (LSV) test using electrochemical workstation, recorded at 10mA/cm 2 Overpotential at current density.
5. Data analysis: analyzing the obtained data to determine Ru 1-x Zr x O 2 (0<x<1) Activity of the catalyst.
The above two embodiments cover Ru 1-x Zr x O 2 (0<x<1) The synthesis and performance test of the catalyst are two key steps. Through these steps, researchers can evaluate Ru 1-x Zr x O 2 (0<x<1) The catalyst has practical application performance in proton exchange membrane water electrolysis system.
Aiming at the problems existing in the prior art, the invention provides a proton exchange membrane water electrolysis catalyst and a synthesis method thereof.
The invention providesThe proton exchange membrane water electrolysis catalyst is Ru 0.90 Zr 0.10 O 2 ；Ru 0.90 Zr 0.10 O 2 The catalyst showed high activity under acidic conditions, requiring only 170mV overpotential to reach 10mA/cm 2 Is used for the current density of the battery. Ru (Ru) 0.90 Zr 0.10 O 2 A Scanning Electron Microscope (SEM) image of (a) is shown in fig. 3. Ru (Ru) 0.90 Zr 0.10 O 2 The XRD pattern of (c) confirmed the tetragonal structure as shown in fig. 2.
Further, ru 1-x Zr x O 2 (0<x<1) The catalyst is synthesized by a hydrothermal method.
As shown in fig. 1, the synthesis method of the proton exchange membrane water electrolysis catalyst provided by the embodiment of the invention comprises the following steps:
s101, accurately weighing raw materials and mixing the raw materials;
s102, filling the mixture into a polytetrafluoroethylene-lined autoclave with 100 milliliters;
s103, after 2 hours of magnetic stirring, sealing the autoclave, keeping the autoclave at 140-200 ℃ for 2-72 hours, and then cooling the autoclave to room temperature;
s104, centrifugally collecting a product, washing the product with absolute ethyl alcohol and distilled water for multiple times, and finally drying the product at room temperature.
Further, the raw materials are zirconium nitrate, zirconium sulfate, zirconium acetate, ruthenium sulfate and disodium Edetate (EDTANA) 2 )。
Further, the raw material was 0.027 g of Zr (NO) 3 ) 4 . 5H 2 0. 0.14 g Cl 3 H 6 O 3 Ru and 0.1 g EDTANA 2 The method is used for preparing the catalyst with optimized performance.
By Ru in the invention 0.90 Zr 0.10 O 2 The catalyst is used as an anode electrolyzed water oxygen production catalytic material, and a commercial Pt/C material is used as a cathode electrolyzed water hydrogen production catalytic material to manufacture a small-area single-stack proton exchange membrane electrolytic tank. The electrolytic cell shows a higher performance at 80 ℃ and normal pressureHigh activity and stability.
The embodiment of the invention has a great advantage in the research and development or use process, and has the following description in combination with data, charts and the like of the test process.
Electrochemical testing
All electrochemical tests were performed using an electrochemical workstation (model CHI 760E). To prepare the working electrode, a mixture of 4 mg of catalyst, 1 mg of carbon, 0.5 ml of methanol, 0.49 ml of ethanol, 0.01 ml of 1% strength by mass Nafion and 0.01 ml of water was sonicated for 1 hour. Then, the ink was dropped on the carbon paper to obtain a mass density equivalent to z.
The electrocatalytic Oxygen Evolution Reaction (OER) activity of the prepared electrode was 0.5M H 2 SO 4 The solution was evaluated using a standard three electrode cell. All potentials of these samples were referenced to a Reversible Hydrogen Electrode (RHE). Hg/Hg 2 SO 4 Used as reference electrode, platinum foil was used as counter electrode, and each of the synthetic materials was used as working electrode. The potential uses formula E RHE ＝E 0 +0.059×ph+0.656 was converted to RHE scale, where pH was 0.3.
Novel catalyst Ru 1-x Zr x O 2 (0<x<1) An electrochemical catalyst as OER was synthesized by hydrothermal method. As shown in FIG. 4, the catalyst was optimized at 10mA/cm 2 The overpotential at the current density of (c) is 170 millivolts (mV). The composite chemical composition of zirconium and ruthenium not only helps to obtain excellent electrochemical activity compared to other electrode catalysts, but also enhances the resistance in acidic environments by metal doping. This in turn results in improved catalytic performance, reduced resistance, and an extended electrochemical operating range at higher voltages.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (8)
1. A proton exchange membrane water electrolysis catalyst is characterized in that the proton exchange membrane water electrolysis catalyst is Ru 1- x Zr x O 2 (0<x<1)。
2. The proton exchange membrane electrolyzed water catalyst of claim 1, wherein Ru 1-x Zr x O 2 (0<x<1) The catalyst shows high activity under acidic condition, and the catalyst Ru is optimized 0.90 Zr 0.10 O 2 At 10mA/cm 2 The overpotential at current density was 170mV.
3. The proton exchange membrane electrolyzed water catalyst of claim 1, wherein Ru 1-x Zr x O 2 (0<x<1) The catalyst is synthesized by a hydrothermal method.
4. A method for synthesizing the proton exchange membrane water electrolysis catalyst according to any one of claims 1 to 3, comprising the steps of:
firstly, accurately weighing raw materials and mixing the raw materials;
step two, filling the mixture into a polytetrafluoroethylene-lined autoclave with 100 milliliters;
step three, after 2 hours of magnetic stirring, sealing the autoclave, keeping the autoclave at 140-200 ℃ for 2-72 hours, and then cooling the autoclave to room temperature;
and step four, centrifugally collecting the product, washing the product with absolute ethyl alcohol and distilled water for multiple times, and finally drying the product at room temperature.
5. The method for synthesizing a proton exchange membrane water electrolysis catalyst according to claim 4, wherein the raw materials are zirconium nitrate, zirconium sulfate, zirconium acetate, ruthenium sulfate and disodium Edetate (EDTANA) 2 )。
6. The method for synthesizing a proton exchange membrane electrolyzed water catalyst according to claim 4, wherein said raw material is 0.027 g Zr (NO 3 ) 4 . 5H 2 0. 0.14 g Cl 3 H 6 O 3 Ru and 0.1 g EDTANA 2 Is used for preparing the catalyst with optimized performance.
7. Use of a proton exchange membrane electrolyzed water catalyst according to any of claims 1 to 3 in an oxygen evolution reaction.
8. Use of a proton exchange membrane water electrolysis catalyst according to any one of claims 1 to 3 in the field of water splitting.
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