CN113278988A - Preparation method of O-doped NiCoP high-efficiency hydrogen evolution electrode - Google Patents

Preparation method of O-doped NiCoP high-efficiency hydrogen evolution electrode Download PDF

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CN113278988A
CN113278988A CN202110564910.2A CN202110564910A CN113278988A CN 113278988 A CN113278988 A CN 113278988A CN 202110564910 A CN202110564910 A CN 202110564910A CN 113278988 A CN113278988 A CN 113278988A
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nickel
nicop
hydrogen evolution
doped
electrode
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齐晶瑶
文焱
李欣
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Harbin Institute of Technology
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    • 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
    • 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 discloses a preparation method of an O-doped NiCoP high-efficiency hydrogen evolution electrode, belongs to the field of hydrogen preparation, and aims to solve the problems of high reaction overpotential and low activity of the conventional electrocatalytic hydrogen evolution electrode. The preparation method comprises the following steps: firstly, ultrasonically cleaning and drying foamed nickel; secondly, placing the pretreated foam nickel and phosphorus sources at the air ports at two ends of the tubular furnace, heating in protective gas to carry out a phosphating reaction, and cleaning and drying to obtain an electrode material loaded with a nickel phosphide layer; thirdly, immersing the electrode material loaded with the nickel phosphide layer in a nickel-cobalt precursor solution for soaking treatment; fourthly, repeating the phosphating reaction process in the second step and the soaking treatment process in the third step for multiple times to obtain the O-doped NiCoP high-efficiency hydrogen evolution electrode. The invention uniformly mixes the O element into the catalyst layer to form the multi-layer composite structure catalytic electrode with uniform catalyst layer and high hydrogen evolution activity. The method has the advantages of simple operation, low production cost and stable electrode structure.

Description

Preparation method of O-doped NiCoP high-efficiency hydrogen evolution electrode
Technical Field
The invention belongs to the field of hydrogen preparation, and particularly relates to a preparation method of an efficient O-doped NiCoP hydrogen evolution electrode.
Background
The hydrogen energy is distinguished from a plurality of clean energy sources by the advantages of high combustion heat value, cleanness, no pollution, good cyclicity and the like, and is considered as the next generation clean renewable energy source with the most application potential. Since the proposal of "hydrogen economy" in 1970, hydrogen energy has attracted much attention. At present, a plurality of common hydrogen production technologies are available, and the technologies can be divided into the following raw materials: hydrogen production by fossil energy (hydrogen production by coal gasification, hydrogen production by natural gas reforming, and the like), hydrogen production by biomass (hydrogen production by biomass based chemical or biological methods), and hydrogen production by water. In long term, the hydrogen is prepared by decomposing water, so that the raw materials are rich, and the green cycle of mutual conversion of hydrogen energy and water can be realized, therefore, the hydrogen production by decomposing water is undoubtedly the most ideal hydrogen production mode which can be developed vigorously.
At present, the alkaline water electrolysis technology is mature in water decomposition technology, simple to operate and wide in application. The essence of water electrolysis is that electric energy is converted into chemical energy, and the higher overpotential (slow reaction kinetics) increases the energy consumption of the water electrolysis process and also hinders the water electrolysis industrialization process. The high and low overpotential of hydrogen evolution of the material and the strong and weak mechanical and chemical stability have great influence on the energy consumption and safe and stable operation of the system. Lowering the reaction overpotential is an effective strategy to achieve efficient and low-energy-consumption water electrolysis. In general, the external resistance can be reduced mainly by optimizing the design of the electrolytic cell, and the specific surface area of the material is increased by optimizing the preparation method and regulating the morphology in the preparation process of the electrode material, so that the overpotential of the reaction is reduced in a mode of exposing more catalytic active sites in the catalytic reaction process and the like. In order to further improve the electrocatalytic hydrogen evolution activity of the electrode material and reduce energy consumption, many scientific and technological researchers develop a plurality of novel hydrogen evolution electrode materials around how to enhance the intrinsic activity of the catalytic material active sites. The preparation of highly active electrodes is an important direction for improving the alkaline water electrolysis process.
Disclosure of Invention
The invention aims to solve the problems of high reaction overpotential and low activity of the conventional electrocatalytic hydrogen evolution electrode, and provides a preparation method of an O-doped NiCoP high-efficiency hydrogen evolution electrode.
The preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode is realized according to the following steps:
soaking foamed nickel in an acetone solvent, ultrasonically cleaning, then alternately cleaning with absolute ethyl alcohol and deionized water, drying to obtain pretreated foamed nickel, and keeping a surface oxide layer;
secondly, placing the pretreated foam nickel and phosphorus sources at the air ports at two ends of the tubular furnace, heating in protective gas to carry out a phosphating reaction, naturally cooling after the reaction, taking out reactants, and cleaning and drying to obtain the electrode material loaded with a phosphating nickel layer;
dissolving a cobalt source and a nickel source in deionized water, preparing to obtain a nickel-cobalt precursor solution, and then immersing the electrode material loaded with the nickel phosphide layer in the nickel-cobalt precursor solution for soaking treatment to obtain treated nickel foam;
fourthly, repeating the phosphating reaction process in the second step and the soaking treatment process in the third step for multiple times, and finally finishing the phosphating reaction to obtain the O-doped NiCoP high-efficiency hydrogen evolution electrode.
In the O-doped NiCoP high-efficiency hydrogen evolution electrode, foam nickel is used as a substrate, and a nickel phosphide layer is prepared by utilizing a surface oxidation layer of the foam nickel substrate through a low-temperature phosphating reaction; and then, soaking the pretreated foamed nickel into a nickel-cobalt precursor solution in a soaking mode, and then carrying out low-temperature phosphating. And repeating the immersion treatment and low-temperature phosphorization steps to grow a NiCoP nanoparticle catalyst layer on the surface of the substrate, and simultaneously uniformly doping O element into the catalyst layer to prepare the O-doped NiCoP-loaded high-efficiency hydrogen evolution electrode. Can be widely applied to the alkaline water electrolysis industry.
The O-doped NiCoP high-efficiency hydrogen evolution electrode and the preparation method thereof have the following beneficial effects:
1. the invention adopts the thermal decomposition of Ni/Co precursor into Ni/Co oxide/hydroxide, retains the surface oxidation layer when the foam nickel is pretreated, and utilizes the oxidation layer to carry out the subsequent phosphorization reaction, namely the reaction with sodium hypophosphitepH produced by pyrolysis3The gas is reacted and converted into NiCoP in situ. O atoms in the Ni/Co precursor or bound oxygen on the surface of the material are introduced into NiCoP through repeated immersion and low-temperature phosphating reactions. The high-efficiency hydrogen evolution electrode loaded with the O-doped NiCoP prepared by the invention has the advantages of simple preparation method, large specific surface area of the prepared electrode and high hydrogen evolution activity. The method forms an O-doped NiCoP layered composite structure in a manner of immersion and low-temperature phosphorization. The stacking of the layered NiCoP particles effectively increases the specific surface area of the electrode and provides more active sites for hydrogen evolution reaction. In addition, the electronic structure of the nickel-cobalt element is adjusted by doping O, so that the adsorption energy of a reaction intermediate is optimized, and the energy barrier of hydrogen evolution reaction is reduced, so that the catalytic hydrogen evolution activity of the electrode reaction is further improved.
2. The high-efficiency hydrogen evolution electrode loaded with the O-doped NiCoP prepared by the invention has good stability. The nickel phosphide interlayer prepared by utilizing the oxide layer of the foamed nickel has strong interface effect with the catalyst NiCoP, and the adhesion capability of the catalytic electrode material is enhanced. The phenomenon that the catalyst falls off in the hydrogen evolution reaction process of the catalyst layer is prevented, and the structural stability of the catalytic electrode is improved.
3. The O-doped NiCoP-loaded efficient hydrogen evolution electrode prepared by the invention has good conductivity. The introduction of the multilayer composite structure effectively reduces the transmission resistance in the electrode conduction process, thereby improving the conductivity of the electrode.
4. The invention has scientific and reasonable design, has the advantages of high catalytic hydrogen evolution activity, strong stability and good conductivity, and is a high-efficiency hydrogen evolution electrode loaded with O-doped NiCoP and a preparation method thereof.
Drawings
FIG. 1 is a scanning electron microscope image of an O-doped NiCoP-loaded high-efficiency hydrogen evolution electrode prepared in example 1 of the present invention;
FIG. 2 is an enlarged scanning electron microscope image of the O-doped NiCoP-loaded high-efficiency hydrogen evolution electrode prepared in example 1 of the present invention;
FIG. 3 is a polarization diagram of a high performance hydrogen evolution electrode loaded with O-doped NiCoP and a nickel foam electrode prepared in example 1 of the present invention, wherein the solid line represents the hydrogen evolution electrode of example 1 and the dotted line represents the nickel foam;
FIG. 4 is a graph of the chronopotentiometric curve of the O-doped NiCoP-loaded hydrogen evolution electrode prepared in example 1 of the present invention;
fig. 5 is an Electrochemical Impedance Spectroscopy (EIS) graph of an O-doped NiCoP-loaded hydrogen evolution electrode prepared in example 1 of the present invention.
Detailed Description
The first embodiment is as follows: the preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode is implemented according to the following steps:
soaking foamed nickel in an acetone solvent, ultrasonically cleaning, then alternately cleaning with absolute ethyl alcohol and deionized water, drying to obtain pretreated foamed nickel, and keeping a surface oxide layer;
secondly, placing the pretreated foam nickel and phosphorus sources at the air ports at two ends of the tubular furnace, heating in protective gas to carry out a phosphating reaction, naturally cooling after the reaction, taking out reactants, and cleaning and drying to obtain the electrode material loaded with a phosphating nickel layer;
dissolving a cobalt source and a nickel source in deionized water, preparing to obtain a nickel-cobalt precursor solution, and then immersing the electrode material loaded with the nickel phosphide layer in the nickel-cobalt precursor solution for soaking treatment to obtain treated nickel foam;
fourthly, repeating the phosphating reaction process in the second step and the soaking treatment process in the third step for multiple times, and finally finishing the phosphating reaction to obtain the O-doped NiCoP high-efficiency hydrogen evolution electrode.
The thickness of the foam nickel in the embodiment is 0.1-3 mm.
In the preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode according to the embodiment, the oxidation layer of the foam nickel is firstly phosphated, and then the catalyst layer is prepared by repeatedly immersing and phosphatizing.
The second embodiment is as follows: the difference between the first embodiment and the second embodiment is that in the first step, the frequency of ultrasonic cleaning is controlled to be 10-50 kHz, and the time of ultrasonic cleaning is 1-60 min.
The third concrete implementation mode: the difference between the second embodiment and the first or second embodiment is that the phosphorus source in the second embodiment is one or more of hypophosphite, red phosphorus, phosphate compounds and their hydrates.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is that the shielding gas in the second step is one or more of nitrogen, helium or argon.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is that the process of the phosphating reaction in the second step is as follows:
in protective gas at 1-10 deg.C for min-1The temperature is increased to 250-450 ℃ at the temperature rising rate, then the temperature is kept for 10-600 min, and the ventilation rate of the protective gas is as follows: 0.1-10L min-1。
The sixth specific implementation mode: the difference between this embodiment and one of the first to the fifth embodiments is that the cobalt source in step three is one or more of cobalt nitrate, cobalt nitrite, cobalt sulfate, cobalt carbonate and its hydrate, and cobalt halide.
The seventh embodiment: the difference between this embodiment and one of the first to the sixth embodiments is that the nickel source in step three is one or more of a mixture of nickel nitrate, nickel nitrite, nickel sulfate, nickel carbonate, nickel hydrate and nickel halide.
The specific implementation mode is eight: the difference between the present embodiment and one of the first to seventh embodiments is that the molar ratio of the nickel source to the cobalt source in the nickel-cobalt precursor solution in the step three is 1: 0.1 to 10.
The specific implementation method nine: the present embodiment is different from the first to eighth embodiments in that the phosphating reaction process of the second step and the soaking treatment process of the third step are sequentially repeated for 2 to 10 times in the fourth step.
The detailed implementation mode is ten: the difference between the first embodiment and the ninth embodiment is that the particle size of NiCoP particles in the O-doped NiCoP high-efficiency hydrogen evolution electrode obtained in the fourth step is 0.1-50 μm.
Example 1: the preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode is implemented according to the following steps:
firstly, cutting the foamed nickel with the thickness of 1.5mm into 1 multiplied by 1cm2Completely soaking a foamed nickel substrate serving as a substrate by using 100ml of acetone solvent, carrying out ultrasonic oscillation for 30min, wherein the ultrasonic cleaning frequency is 20kHz to remove residual oil stain on the surface of the foamed nickel, alternately cleaning the foamed nickel substrate by using absolute ethyl alcohol and deionized water for 5 times until the pH value is 7, then placing the foamed nickel substrate in a vacuum drying oven at 60 ℃ for drying for 6h to obtain pretreated foamed nickel, and keeping a surface oxidation layer;
secondly, putting 1g of pretreated foamed nickel and phosphorus source sodium hypophosphite into an upper tuyere and a lower tuyere of a tube furnace, and performing reaction at the temperature of 2 ℃ for min in nitrogen-1The temperature rise rate is increased to 300 ℃, the phosphating reaction is carried out for 180min at constant temperature, the reaction is naturally cooled, and the nitrogen aeration rate is as follows: 1L min-1Taking out the reactant, repeatedly washing with deionized water and ethanol for 5 times, and drying in a vacuum drying oven at 60 ℃ for 6h to obtain the electrode material loaded with the nickel phosphide layer;
thirdly, mixing the raw materials in a molar mass ratio of 1: 2, dissolving cobalt nitrate hexahydrate and nickel nitrate hexahydrate in deionized water to prepare 30ml of nickel-cobalt precursor solution, then immersing the electrode material loaded with the nickel phosphide layer in the nickel-cobalt precursor solution for soaking treatment, putting the electrode material into a vacuum drying oven at 60 ℃ for drying for 6 hours, and drying to obtain treated foamed nickel;
and fourthly, sequentially carrying out a phosphorization reaction process, a soaking treatment process and a phosphorization reaction process to obtain the O-doped NiCoP high-efficiency hydrogen evolution electrode.
The appearance of the O-doped NiCoP-loaded high-efficiency hydrogen evolution electrode is as follows:
the morphology of the prepared O-doped NiCoP electrode is observed by using a scanning electron microscope, and the obtained Scanning Electron Microscope (SEM) picture is shown in figures 1 and 2.
And (3) testing the hydrogen evolution performance of the O-doped NiCoP-loaded efficient hydrogen evolution electrode:
and (3) performing performance test on the foamed nickel and the prepared O-doped NiCoP electrode by adopting a linear potential scanning method. Adopts a three-electrode system, the prepared electrode is a working electrode, the Hg/HgO electrode is a reference electrode, and the platinum sheet electrode is a platinum sheet electrodeA counter electrode. The electrolyte is 1M KOH solution, and the scanning speed is 2mV s-1The sweep range was-0.9V to-1.3V vs. Hg/HgO. The hydrogen evolution performance of Chenhua CHI660E electrochemical workstation (manufactured by Chenhua corporation, Shanghai, China) was tested, and the test results correspond to FIG. 3. FIG. 3 reflects the electrocatalytic hydrogen evolution performance of O-doped NiCoP high efficiency hydrogen evolution electrodes. The lower the hydrogen evolution overpotential of the material is, the better the catalytic performance is at the same current density. The O-doped NiCoP high-efficiency hydrogen evolution electrode prepared by the embodiment is 10mA cm-2The hydrogen evolution overpotential is about 42mV vs. RHE under the current density.
And (3) testing the stability of the O-doped NiCoP-loaded high-efficiency hydrogen evolution electrode:
a three-electrode system is adopted, the prepared electrode is a working electrode, the Hg/HgO electrode is a reference electrode, and the platinum sheet electrode is a counter electrode. The electrolyte was 1M KOH solution, which was tested at 10mA cm on Chenghua CHI660E electrochemical workstation (manufactured by Chenghua, Inc., Shanghai, China)-2The stability of the current density was tested by plotting the timing potential against the current density, the test results corresponding to fig. 4. It can be seen from fig. 4 that the voltage of the electrode material remains substantially constant at a certain current density, indicating that it has good electrocatalytic stability.
Conductivity test of the O-doped NiCoP loaded high efficiency hydrogen evolution electrode:
a three-electrode system is adopted, the prepared electrode is a working electrode, the Hg/HgO electrode is a reference electrode, and the platinum sheet electrode is a counter electrode. Electrolyte is 1M KOH solution, and is tested at 10mA cm on Chenghua CHI660E electrochemical workstation (manufactured by Chenghua, Inc. of Shanghai, China)-2Electrochemical Impedance Spectroscopy (EIS) at current density corresponding to overpotential and test frequency of 106～10-1Hz, used to characterize its conductivity, and the test results correspond to fig. 5. FIG. 5 reflects the catalyst at 10mA cm-2Electrical resistance at current density during catalytic reaction. The smaller the semi-ring, the smaller the transfer resistance and the easier the catalytic reaction. The transmission resistance fitting value of the O-doped NiCoP high-efficiency hydrogen evolution electrode prepared by the embodiment is 4.8 omega.
Example 2: the difference between this embodiment and embodiment 1 is that the phosphorus source in step two is red phosphorus.
Example 3: this example differs from example 1 in that step four is not performed.
Example 4: the present example differs from example 1 in that the molar mass ratio of 1: 1, dissolving cobalt nitrate hexahydrate and nickel nitrate hexahydrate in deionized water to prepare 30ml of nickel-cobalt precursor solution, and then immersing the electrode material loaded with the nickel phosphide layer in the nickel-cobalt precursor solution for soaking treatment.
The high-efficiency hydrogen evolution electrode loaded with the O-doped NiCoP prepared by the invention utilizes a surface oxidation layer of a foam nickel substrate to prepare a phosphating nickel layer by pre-phosphating. And then immersing the electrode into a nickel-cobalt precursor solution in an immersion mode, and then carrying out low-temperature phosphating to uniformly dope an O element into the catalyst layer. The strategy for preparing the O-doped NiCoP catalytic electrode by immersing and low-temperature phosphating after the pre-phosphating effectively increases the specific surface area of the electrode, improves the conductivity of the electrode, provides more active sites for hydrogen evolution reaction, optimizes the adsorption energy of a reaction intermediate, reduces the energy barrier of the hydrogen evolution reaction, enhances the structural stability of the electrode, ensures that the formed electrode has excellent hydrogen evolution performance and is stable within the electrolysis time of more than 24 hours.

Claims (10)

  1. A preparation method of an O-doped NiCoP high-efficiency hydrogen evolution electrode is characterized by comprising the following steps:
    soaking foamed nickel in an acetone solvent, ultrasonically cleaning, then alternately cleaning with absolute ethyl alcohol and deionized water, drying to obtain pretreated foamed nickel, and keeping a surface oxide layer;
    secondly, placing the pretreated foam nickel and phosphorus sources at the air ports at two ends of the tubular furnace, heating in protective gas to carry out a phosphating reaction, naturally cooling after the reaction, taking out reactants, and cleaning and drying to obtain the electrode material loaded with a phosphating nickel layer;
    dissolving a cobalt source and a nickel source in deionized water, preparing to obtain a nickel-cobalt precursor solution, and then immersing the electrode material loaded with the nickel phosphide layer in the nickel-cobalt precursor solution for soaking treatment to obtain treated nickel foam;
    fourthly, repeating the phosphating reaction process in the second step and the soaking treatment process in the third step for multiple times, and finally finishing the phosphating reaction to obtain the O-doped NiCoP high-efficiency hydrogen evolution electrode.
  2. 2. The preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein in the step one, the ultrasonic cleaning frequency is controlled to be 10-50 kHz, and the ultrasonic cleaning time is 1-60 min.
  3. 3. The method for preparing an O-doped NiCoP high efficiency hydrogen evolution electrode according to claim 1, wherein the phosphorus source in the second step is one or more of hypophosphite, red phosphorus, phosphate compounds and their hydrates.
  4. 4. The method for preparing an O-doped NiCoP high efficiency hydrogen evolution electrode according to claim 1, wherein the shielding gas in the second step is one or more of nitrogen, helium or argon.
  5. 5. The method for preparing an O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein the phosphating reaction in the second step is as follows:
    in a protective gas at 1-10 deg.C for one minute-1The temperature is increased to 250-450 ℃ at the temperature rising rate, then the temperature is kept for 10-600 min, and the ventilation rate of the protective gas is as follows: 0.1-10L min-1。
  6. 6. The method for preparing an O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein the cobalt source in the third step is one or more of cobalt nitrate, cobalt nitrite, cobalt sulfate, cobalt carbonate and its hydrate, and cobalt halide.
  7. 7. The method for preparing an O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein the nickel source in step three is one or more of a mixture of nickel nitrate, nickel nitrite, nickel sulfate, nickel carbonate, nickel hydrate and nickel halide.
  8. 8. The method for preparing an O-doped NiCoP high efficiency hydrogen evolution electrode according to claim 1, wherein the molar ratio of the nickel source to the cobalt source in the nickel-cobalt-nickel precursor solution is 1: 0.1 to 10.
  9. 9. The preparation method of the O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein the phosphating reaction process of the second step and the soaking treatment process of the third step are sequentially repeated for 2-10 times in the fourth step.
  10. 10. The method for preparing the O-doped NiCoP high-efficiency hydrogen evolution electrode according to claim 1, wherein the particle size of NiCoP particles in the O-doped NiCoP high-efficiency hydrogen evolution electrode obtained in the fourth step is 0.1-50 μm.
CN202110564910.2A 2021-05-24 2021-05-24 Preparation method of O-doped NiCoP high-efficiency hydrogen evolution electrode Pending CN113278988A (en)

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CN113699552A (en) * 2021-08-26 2021-11-26 中南大学 Cobalt phosphate-molybdenum trioxide composite nanorod array three-dimensional electrode material and preparation method and application thereof
CN115010220A (en) * 2022-06-17 2022-09-06 南通大学 Electrode with phosphide and hydroxide heterostructure and preparation method thereof
CN115466979A (en) * 2022-09-09 2022-12-13 上海科技大学 Preparation method of nickel-cobalt-phosphorus electrocatalyst for efficient water electrolysis hydrogen evolution

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113699552A (en) * 2021-08-26 2021-11-26 中南大学 Cobalt phosphate-molybdenum trioxide composite nanorod array three-dimensional electrode material and preparation method and application thereof
CN113699552B (en) * 2021-08-26 2022-07-29 中南大学 Cobalt phosphate-molybdenum trioxide composite nanorod array three-dimensional electrode material and preparation method and application thereof
CN115010220A (en) * 2022-06-17 2022-09-06 南通大学 Electrode with phosphide and hydroxide heterostructure and preparation method thereof
CN115010220B (en) * 2022-06-17 2023-12-01 南通大学 Electrode with phosphide synergistic hydroxide heterostructure and preparation method thereof
CN115466979A (en) * 2022-09-09 2022-12-13 上海科技大学 Preparation method of nickel-cobalt-phosphorus electrocatalyst for efficient water electrolysis hydrogen evolution
CN115466979B (en) * 2022-09-09 2024-04-12 上海科技大学 Preparation method of nickel-cobalt-phosphorus electrocatalyst for high-efficiency electrolysis of water to hydrogen

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Application publication date: 20210820