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Preparation method and application of nickel selenide/molybdenum selenide composite nano electrocatalyst

An electrocatalyst, molybdenum selenide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor conductivity, poor performance, difficult preparation of electrocatalytic materials, etc., to reduce energy. , The distribution of components is uniform, which is beneficial to the effect of ion transmission

Active Publication Date: 2020-12-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes traditional single component NiSe, MoSe 2 For the problems of difficult preparation, poor performance and poor conductivity of electrocatalytic materials, a preparation method of nickel selenide / molybdenum selenide composite nano-electrocatalyst with uniform size, stable structure and high conductivity is provided

Method used

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  • Preparation method and application of nickel selenide/molybdenum selenide composite nano electrocatalyst
  • Preparation method and application of nickel selenide/molybdenum selenide composite nano electrocatalyst
  • Preparation method and application of nickel selenide/molybdenum selenide composite nano electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take a clean beaker, add 50ml deionized water, weigh 0.42g Na 2 MoO 4 2H 2 O, and 0.3g Ni(NO 3 ) 2 ·6H 2 O was poured into deionized water, weighed 0.475g 2-methylimidazole and 0.99g Na 2 SO 4 Pour into the mixed solution of metal salts and ultrasonically dissolve. Pour it into a 100ml reaction kettle, place it in an oven and heat it to 120°C, react for 8 hours, and cool down to room temperature naturally after the reaction stops. Take out the solution after the reaction, centrifuge, and centrifuge and wash the lower part of the precipitate with deionized water for 3 times, and vacuum-dry at 60°C for 12 hours to obtain the precursor;

[0032] (2) Put the precursor obtained in step (1) in N 2 Under the atmosphere, the temperature was raised to 700°C at a rate of 10°C / min, kept for 2 hours, and then cooled to 500°C at a rate of 10°C / min, and the gas was switched to H 2 / Ar 2 Mixed gas (H 2 and Ar 2 The volume ratio is 1:9), and then push the crucible conta...

Embodiment 2

[0045] 1) Take a clean beaker, add 50ml deionized water, weigh 0.42g Na 2 MoO 4 2H 2 O, and 0.15g Ni(NO 3 ) 2 ·6H 2 Pour O into deionized water, weigh 0.3g 2-methylimidazole and 0.99g Na 2 SO 4 Pour into the mixed solution of metal salts and ultrasonically dissolve. Pour it into a 100ml reaction kettle, place it in an oven and heat it to 180°C, react for 6 hours, and cool down to room temperature naturally after the reaction stops. Take out the solution after the reaction, centrifuge, and centrifuge and wash the lower part of the precipitate with deionized water for 3 times, and vacuum-dry at 60°C for 12 hours to obtain the precursor;

[0046] (2) Put the precursor obtained in step (1) in N 2 Under the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min, kept for 4 hours, and then cooled to 300°C at a rate of 1°C / min, and the gas was switched to H 2 / Ar 2 Mixed gas (H 2 and Ar 2 The volume ratio is 1:9), and then push the crucible containing 100mg ...

Embodiment 3

[0049] 1) Take a clean beaker, add 50ml deionized water, weigh 0.38g Na 2 MoO 4 2H 2 O, and 0.2g Ni(NO 3 ) 2 ·6H 2 O was poured into deionized water, weighed 0.3g 2-methylimidazole and 0.8g Na 2 SO 4 Pour into the metal salt mixed solution, ultrasonically dissolve, pour into a 100ml reaction kettle, place in an oven and heat to 80°C, react for 12h, and naturally cool down to room temperature after the reaction stops. Take out the solution after the reaction, centrifuge, and centrifuge and wash the lower part of the precipitate with deionized water for 3 times, and vacuum-dry at 60°C for 12 hours to obtain the precursor;

[0050] (2) Put the precursor obtained in step (1) in N 2 Under the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min, kept for 4 hours, and then cooled to 300°C at a rate of 1°C / min, and the gas was switched to H 2 / Ar 2 Mixed gas (H 2 and Ar 2 The volume ratio is 1:9), and then push the crucible containing 150mg selenium powder ...

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Abstract

The invention belongs to the technical field of nano materials, in particular to a preparation method and application of a nickel selenide / molybdenum selenide composite nano electrocatalyst. The preparation method comprises the following steps that: 1, molybdenum salt, nickel salt, 2-methylimidazole and sodium sulfate are dissolved in deionized water to obtain a mixed solution, and a precursor isobtained after hydrothermal reaction, cooling, washing and drying are performed; and (2) calcining the precursor in a nitrogen atmosphere, and carrying out selenylation treatment in H2 / Ar2 mixed gas to obtain the nickel selenide / molybdenum selenide composite nano electrocatalyst. The NiSe / MoSe2 multilevel structure nano-particles prepared by the method are uniform in size, stable in structure anduniform in component distribution; the material is endowed with better electrocatalytic performance and stability; the catalytic material is of a nano-particle structure assembled by two-dimensional nanosheets, and the structure is more beneficial to ion transmission, and the conductivity of the material is improved.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a preparation method and application of a nickel selenide / molybdenum selenide composite nano electrocatalyst. Background technique [0002] As a clean secondary energy source, hydrogen energy is widely used in various fields such as fuel cell vehicles, power generation, and energy storage. The characteristics of large-scale storage allow it to partially replace oil and natural gas, and play a certain role in combating climate change and ensuring energy security. In recent years, hydrogen energy has gradually become the darling of the energy field and has been widely studied. [0003] Hydrogen production by electrolysis of water, as a hydrogen production method with broad application prospects, has received extensive research and attention in recent years. Electrolyzed water consists of two half-reactions of oxygen evolution reaction (OER) and hydrogen evolution reac...

Claims

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Application Information

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IPC IPC(8): B01J27/057C25B1/04C25B11/06
CPCB01J27/0573C25B1/04B01J35/33B01J35/23Y02E60/36
Inventor 曹澥宏俞林海刘文贤尹瑞连
Owner ZHEJIANG UNIV OF TECH
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