CN117265572A - Preparation method of cerium doped nickel sulfide catalyst and electrochemical application thereof - Google Patents
Preparation method of cerium doped nickel sulfide catalyst and electrochemical application thereof Download PDFInfo
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- CN117265572A CN117265572A CN202310062261.5A CN202310062261A CN117265572A CN 117265572 A CN117265572 A CN 117265572A CN 202310062261 A CN202310062261 A CN 202310062261A CN 117265572 A CN117265572 A CN 117265572A
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- doped nickel
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- sulfide catalyst
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- 239000003054 catalyst Substances 0.000 title claims abstract description 52
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 36
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004202 carbamide Substances 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 10
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims abstract description 6
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052799 carbon Inorganic materials 0.000 abstract description 18
- 239000004744 fabric Substances 0.000 abstract description 16
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- VREFGVBLTWBCJP-UHFFFAOYSA-N alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 239000010411 electrocatalyst Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052573 porcelain Inorganic materials 0.000 description 7
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002484 cyclic voltammetry Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- -1 rare earth metal ions Chemical class 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000012018 catalyst precursor Substances 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- 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
-
- 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
Abstract
The invention prepares cerium doped nickel sulfide catalyst with carbon cloth as substrate and researches the application of the catalyst in oxygen evolution and urea oxidation reaction. Firstly, synthesizing a cerium-doped nickel hydroxide precursor on carbon cloth by taking nickel nitrate, cerium nitrate, urea and ammonium fluoride as raw materials through a hydrothermal method, and then doping sulfur element by utilizing a high-temperature controllable heat treatment method to synthesize the efficient and stable cerium-doped nickel sulfide electrocatalyst. The catalyst has excellent electrochemical performance, low operating voltage of oxygen evolution and urea oxidation reaction, small Tafil slope and oxygen evolution reaction of 10 mA/cm only with 1.40. 1.40V 2 The tafel slope was 40.2 mV/dec; the urea oxidation reaction can reach 10 mA/cm only by 1.28 and 1.28V 2 The tafel slope was 58.3 mV/dec. The catalyst can be repeatedly used for thousands of times, and the performance of the catalyst is still stable, which shows that the catalyst has good long-term stability, thus the catalyst has good electrochemical related fieldsIs a popularization and application prospect.
Description
Technical Field
The invention belongs to the field of electrocatalytic nano materials, and particularly relates to a preparation method of a cerium-doped nickel sulfide electrocatalytic material and application of the cerium-doped nickel sulfide electrocatalytic material in electrolytic water and urea electrooxidation reaction.
Background
Electrocatalytic Oxygen Evolution Reactions (OER) play a considerable role in many renewable energy conversion and storage devices, such as direct fuel cells, hydrogen plants, metal air cells, and the like. However, the efficiency of these energy conversion devices is greatly limited by the slow kinetic steps of OER. In contrast to the high thermodynamic potential of OER (1.23V), urea oxidation (UOR, CO (NH) 2 ) 2 + 6OH - → N 2 + 5 H 2 O + CO 2 + 6e - ) Has extremely low thermodynamic potential barrier (0.37V), is ideal reverse for replacing OERShould be used as an anode reaction in the novel energy conversion device. However, the smooth operation of UOR requires additional energy to overcome the reaction barrier caused by its multiple electron transfer pathways and complex reaction intermediate formation/desorption processes. Therefore, the reaction rate is improved, the activation energy of the intermediate is reduced, and the design of the OER and UOR electrocatalyst with excellent synthesis performance has important practical significance by optimizing a synthesis strategy.
Currently, transition metal nickel-based materials, including hydroxides, oxides and sulfides, are considered to be a class of excellent catalysts for OER and UOR. Sulfide has high conductivity and rich oxidation-reduction chemical property, has various structures, is expected to become an ideal substitute for noble metal catalysts, and has important significance in developing novel sulfide materials for OER and UOR. Research shows that the heteroatom doping can effectively regulate the electronic structure of the active site and improve the activation capability of the reactant. In recent years, rare Earth (RE) elements have received attention because of their flexible vacancy-generating capability and unique chemical, electronic properties of the 4 f-sub-shell orbitals. The rare earth metal ions as dopants can generate more vacancies in the host material, improving the catalytic activity. Meanwhile, rare earth metals have multiple valence electron orbitals, so that the rare earth metals have variable coordination numbers and geometric configurations. Therefore, the electronic structure and the vacancy of the transition metal sulfide are regulated and controlled through rare earth ion doping, and a feasible scheme is provided for designing and synthesizing the high-activity OER and UOR catalysts.
Disclosure of Invention
The invention aims to provide a preparation method of a cerium doped nickel sulfide catalyst and application of the cerium doped nickel sulfide catalyst in electrolytic water and urea oxidation, and application research results show that the catalyst has excellent oxygen evolution, urea oxidation electrocatalytic activity and good chemical stability. The material is a cerium doped nickel sulfide composite material synthesized by a simple hydrothermal method and a high-temperature vulcanization method. The invention aims at realizing the following technical scheme:
firstly, respectively weighing a certain amount of nickel nitrate, cerium nitrate, urea and ammonium fluoride according to a certain raw material ratio, respectively placing the nickel nitrate, the cerium nitrate, the urea and the ammonium fluoride in four beakers, respectively weighing a certain amount of deionized water, respectively adding the deionized water into the four beakersStirring for 30 minutes to fully dissolve the materials, pouring the solution in the four beakers into another beaker for mixing, stirring for 30 minutes to fully mix the solution, then placing the treated carbon cloth and the dissolved mixed solution into a high-pressure reaction kettle, sealing the high-pressure reaction kettle, placing the high-pressure reaction kettle into a baking oven, reacting at 120 ℃ for 12 h to obtain a cerium-doped nickel hydroxide precursor loaded on the carbon cloth, taking out the reacted carbon cloth, washing the carbon cloth with deionized water and absolute ethyl alcohol for three times respectively, and drying the carbon cloth. Then, the cerium doped nickel hydroxide precursor loaded by carbon cloth is placed at the position of the tail end of a porcelain boat, sulfur powder is weighed and placed at the position of the front end of the same porcelain boat, and the porcelain boat is placed in a tube furnace to react at 350 ℃ in a nitrogen atmosphere for 2 h, so that the cerium doped nickel sulfide catalyst is obtained. The catalyst can reach 10 mA/cm only by 1.40. 1.40V when in anodic electrolysis in 1M KOH solution 2 The tafel slope was 40.2 mV/dec; when the anode is electrolyzed in a mixed solution of 1M KOH and 0.5. 0.5M urea, the anode can reach 10 mA/cm only by 1.28. 1.28V 2 The tafel slope was 58.3 mV/dec. Meanwhile, polarization curves can be basically overlapped after 1000 CV cycles, and the catalyst can still keep stable performance after 80 h is used in the two solutions. The test result shows that the catalyst of the invention is expected to be used in electrocatalytic oxygen evolution and urea oxidation reactions.
The invention has the advantages that:
the cerium-doped nickel sulfide catalyst prepared by the method has high-efficiency OER and UOR performances, and is an efficient oxygen evolution and urea oxidation reaction catalyst.
Drawings
FIG. 1 is an X-ray diffraction pattern of a cerium doped nickel sulfide catalyst precursor and a cerium doped nickel sulfide catalyst;
FIG. 2 is a scanning electron microscope image of a cerium doped nickel sulfide catalyst;
FIG. 3 is an energy dispersive X-ray spectrometer imaging diagram of a cerium doped nickel sulfide catalyst;
FIG. 4 is a graph of OER polarization for a cerium doped nickel sulfide catalyst;
FIG. 5 is a graph of the UOR polarization curve for a cerium doped nickel sulfide catalyst;
FIG. 6 is an OER Taphill slope plot for a cerium doped nickel sulfide catalyst;
FIG. 7 is a UOR tafel slope plot of a cerium doped nickel sulfide catalyst;
FIG. 8 is a graph of polarization of a cerium doped nickel sulfide catalyst before and after 1000 cycles of OER;
FIG. 9 is a graph of polarization of a cerium doped nickel sulfide catalyst before and after 1000 cycles of UOR;
FIG. 10 is a graph of OER i-t stability test for cerium doped nickel sulfide catalysts;
FIG. 11 is a graph of UOR i-t stability test for cerium doped nickel sulfide catalysts.
Description of the embodiments
Examples
Pretreatment of a base Carbon Cloth (CC): placing 20 mm multiplied by 20 multiplied by mm multiplied by 0.36 mm carbon in a high-pressure reaction kettle containing 16 mol/L concentrated nitric acid, soaking 12 h at 120 ℃ to clean impurities on the surface of the carbon cloth, taking out, sequentially carrying out ultrasonic treatment in deionized water and absolute ethyl alcohol solution for three times, wherein the ultrasonic treatment time is 15 min each time, and drying 3 h in a 60 ℃ oven to obtain the treated base carbon cloth.
Respectively weighing 0.2908 g nickel nitrate, 0.0868 g cerium nitrate, 0.3 g urea and 0.18 g ammonium fluoride, respectively adding 5 mL deionized water into the four beakers, respectively, placing the magnetons into the beakers at room temperature, magnetically stirring and dissolving for 30 min, pouring the solution in the four beakers into another beakers for mixing, placing the magnetons into the beakers at room temperature, magnetically stirring for 30 min to obtain a mixed solution;
transferring the mixed solution into a high-pressure reaction kettle, simultaneously placing the treated carbon cloth into the kettle, sealing the high-pressure reaction kettle, placing the high-pressure reaction kettle into an oven, heating from room temperature at a heating rate of 3 ℃/min, and performing hydrothermal reaction for a reaction time of 12 h after the reaction temperature reaches 120 ℃ to obtain a crude product of the cerium-doped nickel hydroxide precursor loaded by the carbon cloth;
washing the obtained crude product of the carbon cloth-loaded cerium-doped nickel hydroxide precursor with deionized water for three times, washing with absolute ethyl alcohol for three times, and drying 3 h in a 60 ℃ oven to obtain a dried carbon cloth-loaded cerium-doped nickel hydroxide precursor;
cutting the obtained carbon cloth-loaded cerium-doped nickel hydroxide precursor into a sheet shape with the size of 10 mm multiplied by 20 multiplied by mm multiplied by 0.36 mm, placing the sheet shape at the tail end of a porcelain boat, simultaneously weighing 0.5 sulfur powder g, placing the porcelain boat at the front end of the porcelain boat, placing the porcelain boat into a tubular furnace, introducing nitrogen gas from the upstream position for 20 min, heating from room temperature, wherein the heating rate is 3 ℃/min, after the reaction temperature of the tubular furnace reaches 350 ℃, the heat preservation time is 2 h, performing high-temperature vulcanization reaction, and keeping the reaction process in the nitrogen atmosphere all the time, thus obtaining the cerium-doped nickel sulfide catalyst.
The invention also provides a method for using the cerium doped nickel sulfide catalyst in the oxidation reaction of electrolyzed water and urea.
The performance of oxygen evolution reaction and urea oxidation reaction of the cerium doped nickel sulfide catalyst is tested by using an electrochemical workstation and adopting a standard three-electrode system, and the specific testing method is as follows:
polarization curve (LSV), cyclic Voltammogram (CV) and stability test curve (i-t) were tested in a mixed solution of 1M KOH, 1M KOH and 0.5. 0.5M urea using a CHI 760E electrochemical workstation, respectively, with the carbon rod as counter electrode and Hg/HgO as reference electrode, and in order to eliminate interference, nitrogen was introduced into the electrolyte for 30 min before each experiment to remove dissolved oxygen in the electrolyte, and the sweep rate was set at 5 mV/s. The results are shown in FIG. 4, FIG. 5, and FIGS. 8-11.
The electrocatalytic kinetics of the catalyst was evaluated by tafel slope by plotting the overpotential (η) versus log (j) to give tafel curve. The results are shown in FIG. 6 and FIG. 7.
According to the X-ray diffraction test method, the analysis in FIG. 1 shows that the cerium doped nickel sulfide catalyst precursor obtained by the invention is Ce-Ni (OH) 2 The main phase of the cerium doped nickel sulfide catalyst is Ce-NiS 2 . Scanning electron micrographs (as shown in FIG. 2) show that the morphology of the catalyst is a flower-like lamellar structure. Energy dispersive X-ray lightThe spectrometer imaging (EDX-mapping, as in FIG. 3) shows that Ni, ce and S are uniformly distributed, and the doping amount of Ce element is very small.
FIGS. 4 and 5 are linear sweep voltammetric polarization curves of the product obtained in the examples as catalysts in 1M KOH, 1M KOH and 0.5. 0.5M urea solution, respectively. The graph shows that the cerium doped nickel sulfide catalyst has good electrocatalytic activity, and the catalyst can reach 10 mA/cm only by 1.40V when in anodic electrolysis in 1M KOH solution 2 Is only 1.28V to 10 mA/cm in the case of anodic electrolysis in a mixed solution of 1M KOH and 0.5. 0.5M urea 2 Is used for the current density of the battery. FIGS. 6 and 7 are graphs of the Tafil slope of the products obtained in the examples, showing that the cerium doped nickel sulfide catalyst of the present invention has a lower Tafil slope. Figures 8 and 9 show that the polarization curves before and after 1000 cycles in the two solutions substantially coincide, demonstrating that the catalyst has high electrocatalytic performance and is stable for a long period of time. FIGS. 10 and 11 illustrate the constant current density of the product obtained according to the invention (10 mA/cm) 2 ) Performance stability can be maintained after continuous testing 80 h.
Claims (5)
1. A preparation method and electrochemical application of cerium doped nickel sulfide catalyst are characterized in that: the mass ratio of reactants in the preparation method of the precursor of the cerium doped nickel sulfide catalyst is that nickel nitrate: cerium nitrate: urea: ammonium fluoride=1:0.299:1.032:0.619.
2. A preparation method and electrochemical application of cerium doped nickel sulfide catalyst are characterized in that: the solvent in the preparation method of the precursor of the cerium doped nickel sulfide catalyst is deionized water, the water consumption for dissolving 0.2908 g nickel nitrate is 5 mL, the water consumption for dissolving 0.0868 g cerium nitrate is 5 mL, the water consumption for dissolving 0.3 g urea is 5 mL, and the water consumption for dissolving 0.18 g ammonium fluoride is 5 mL.
3. A preparation method and electrochemical application of cerium doped nickel sulfide catalyst are characterized in that: the reaction conditions in the preparation method of the precursor of the cerium doped nickel sulfide catalyst are as follows: the reaction temperature was 120℃and the reaction time was 12 h.
4. A preparation method and electrochemical application of cerium doped nickel sulfide catalyst are characterized in that: the cerium doped nickel sulfide catalyst prepared by the invention is applied to oxygen evolution reaction of water under the electrocatalytic condition, and can reach 10 mA/cm only by 1.40V when in anodic electrolysis in 1M KOH solution 2 Is used for the current density of the battery.
5. A preparation method and electrochemical application of cerium doped nickel sulfide catalyst are characterized in that: the cerium doped nickel sulfide catalyst prepared by the invention is applied to urea oxidation reaction under the electrocatalytic condition, and can reach 10 mA/cm only by 1.28V when being anodized in a mixed solution of 1M KOH and 0.5M urea 2 Is used for the current density of the battery.
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| CN202310062261.5A CN117265572A (en) | 2023-01-18 | 2023-01-18 | Preparation method of cerium doped nickel sulfide catalyst and electrochemical application thereof |
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