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Preparation method of NiMo hydrogen evolution electrocatalyst

An electrocatalyst and hydrogen evolution technology, which is applied in the field of electrocatalysis hydrogen evolution, can solve the problems of high equipment requirements and large environmental impact, and achieve the effect of reducing costs and good catalytic hydrogen evolution activity

Active Publication Date: 2019-09-13
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of the above-mentioned NiMo materials often requires the use of strong reducing agents or at high temperatures, which has a great impact on the environment and requires high requirements for equipment.

Method used

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  • Preparation method of NiMo hydrogen evolution electrocatalyst
  • Preparation method of NiMo hydrogen evolution electrocatalyst
  • Preparation method of NiMo hydrogen evolution electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of NiMo hydrogen evolution electrocatalyst of the present embodiment, comprises the following steps:

[0025] (1) 290.8mg nickel nitrate hexahydrate and 241.9mg sodium molybdate dihydrate are added to 40ml deionized water respectively, and the two are completely dissolved by stirring. The molar concentration is 25mmol / L, and the mass concentrations of nickel nitrate hexahydrate and sodium molybdate dihydrate in the deionized water are 7.27mg / ml and 6.05mg / ml respectively;

[0026] (2) Transfer the solution prepared in step (1) to the reaction kettle, add nickel foam, and conduct a hydrothermal reaction at 160° C. for 5 hours to obtain a nickel molybdate precursor material;

[0027] (3) The sample prepared in step (2) is placed in a tube furnace, and heat-treated under a nitrogen atmosphere, the heat-treatment temperature is 350° C., and the heat-treatment time is 1 hour to obtain nickel molybdate;

[0028] (4) The sample prepared in step (3...

Embodiment 2

[0035] A kind of preparation method of NiMo hydrogen evolution electrocatalyst of the present embodiment, comprises the following steps:

[0036] (1) 320mg nickel nitrate hexahydrate and 266.4mg sodium molybdate dihydrate are added to 40ml deionized water respectively, and the two are completely dissolved by stirring. The concentrations are all 27.5mmol / L, and the mass concentrations of nickel nitrate hexahydrate and sodium molybdate dihydrate in the deionized water are 8.0mg / ml and 6.66mg / ml respectively;

[0037] (2) Transfer the solution prepared in step (1) to the reaction kettle, add nickel foam, and conduct a hydrothermal reaction at 160° C. for 6 hours to obtain a nickel molybdate precursor material;

[0038] (3) the sample prepared by step (2) is placed in a tube furnace, and heat-treated under a nitrogen atmosphere, the heat-treatment temperature is room temperature, and the heat-treatment time is 2 hours to obtain nickel molybdate;

[0039] (4) The sample prepared i...

Embodiment 3

[0042] A kind of preparation method of NiMo hydrogen evolution electrocatalyst of the present embodiment, comprises the following steps:

[0043] (1) 280mg nickel nitrate hexahydrate and 233.2mg sodium molybdate dihydrate are added to 40ml deionized water respectively, stir to make the two dissolve completely, the molar amount of nickel nitrate hexahydrate and sodium molybdate dihydrate in the deionized water The concentrations are all 24.1mmol / L, and the mass concentrations of nickel nitrate hexahydrate and sodium molybdate dihydrate in the deionized water are 7.0mg / ml and 5.83mg / ml respectively;

[0044] (2) Transfer the solution prepared in step (1) to the reaction kettle, add nickel foam, and conduct a hydrothermal reaction at 160° C. for 5.5 hours to obtain a nickel molybdate precursor material;

[0045] (3) The sample prepared in step (2) is placed in a tube furnace, and heat-treated under a nitrogen atmosphere, the heat-treatment temperature is 200° C., and the heat-tre...

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Abstract

Belonging to the field of electrocatalytic hydrogen evolution, the invention discloses a preparation method of a NiMo hydrogen evolution electrocatalyst. The method includes: firstly preparing nickelnitrate hexahydrate and sodium molybdate dehydrate respectively into solutions; then transferring the two solutions into a reaction kettle, adding foamed nickel into the solutions, and carrying out hydrothermal reaction to obtain a nickel molybdate precursor material; then placing the prepared nickel molybdate precursor in a tubular furnace, and performing heat treatment in nitrogen atmosphere toobtain nickel molybdate; and finally, adopting nickel molybdate as the working electrode, taking a lithium sheet or sodium sheet as the counter electrode, using lithium hexafluorophosphate or sodium hexafluorophosphate as the electrolyte, conducting assembling to obtain a lithium battery or sodium battery, standing the battery for a set period of time, and then discharging the battery, thus obtaining the NiMo hydrogen evolution electrocatalyst. The method provided by the invention has no need for high temperature and strong reductant, has relatively mild process, and can precisely control thematerial composition.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic hydrogen evolution, and more specifically relates to a preparation method of a NiMo hydrogen evolution electrocatalyst. Background technique [0002] The hydrogen evolution reaction is a half-reaction of electrolytic water splitting, and is one of the important ways to convert renewable energy such as solar energy, wind energy, and tidal energy into chemical energy. Although platinum-based catalysts have the best hydrogen evolution performance, their commercialization is limited by the scarcity and high price of platinum. Therefore, the development and design of non-precious metal hydrogen evolution electrocatalysts with platinum-like activity and low price is of great significance to promote the large-scale application of electrolytic water splitting (see the literature Guoqiang Zhao, KunRui, Shi Xue Dou, Wenping Sun, Heterostructures for electrochemical hydrogenevolution reaction: a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C25B11/06C25B1/04
CPCB01J23/883C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 黄德康李淑汪圣尧陈浩
Owner HUAZHONG AGRI UNIV
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