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Preparation method of porous nickel-molybdenum-based nanosheet difunctional electrocatalyst

An electrocatalyst and nanosheet technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of HER performance degradation, unreasonable pore structure, and less free electrons on the surface.

Inactive Publication Date: 2020-04-24
TAIYUAN UNIV OF TECH
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Problems solved by technology

At present, there are still some performance deficiencies for this kind of transition metal-based catalysts, especially for HER-type reactions, due to the unreasonable pore structure of the formed transition metal-based catalysts and the lack of free electrons on the surface, resulting in a decline in HER performance

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  • Preparation method of porous nickel-molybdenum-based nanosheet difunctional electrocatalyst

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Embodiment Construction

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail in combination with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The technical solutions of the present invention will be described in detail below in conjunction with the embodiments and drawings, but the scope of protection is not limited thereto.

[0027] A method for preparing a porous nickel-molybdenum-based nanosheet bifunctional electrocatalyst and its OER / HER by using a foamed nickel as a substrate, using a hydrothermal method and subsequent heat treatment, comprising the following steps:

[0028] (1) Preparation of NiMo-precursor

[0029] First prepare the solution, add nickel nitrate hexahydrate and sodium molybdate to the mi...

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Abstract

The invention relates to a preparation method of a porous nickel-molybdenum-based nanosheet difunctional electrocatalyst, and belongs to the technical field of electrochemical electrode materials. Specifically, foamed nickel is used as a matrix, a hydrothermal method and subsequent heat treatment and phosphorus doping are utilized to prepare the porous nickel-molybdenum-based nanosheet difunctional electrocatalyst material, the reaction temperature is 300-360 DEG C, the reaction time is 1.5-2.5 h, and the heating rate is 1.5-2.5 DEG C / min; the phosphorus-doped porous NiMoO4 nanosheet is obtained; the electrode is directly used as a working electrode, and the working electrode has excellent difunctional electrocatalytic performance; improvement of OER catalytic activity can be attributed toformation of a porous structure, and improvement of HER catalytic activity can be attributed to optimization of an electronic structure caused by P doping and the porous structure.

Description

technical field [0001] The invention belongs to the technical field of electrochemical electrode materials, and relates to a preparation method of a two-dimensional electrode material, in particular to a preparation method of a porous nickel-molybdenum-based nanosheet bifunctional electrocatalyst. Background technique [0002] In recent years, with the aggravation of energy crisis and environmental degradation, people are motivated to seek clean and sustainable power generation technologies and the production of energy carriers such as hydrogen and oxygen. Water splitting, including oxygen splitting reaction (OER) and hydrogen splitting reaction (HER), has been widely recognized as an efficient and sustainable method to generate clean and pollution-free hydrogen fuel from water. In general, noble metals (such as Ir or Ru oxides, Pt / C) have excellent catalytic properties and are often used as benchmark materials for OER and HER, but high cost, low durability and limited resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J37/08B01J35/10C25B1/04
CPCB01J27/19B01J37/088C25B1/04B01J35/33B01J35/50B01J35/60B01J35/40Y02E60/36
Inventor 李美芬宋艳慧许并社郭俊杰
Owner TAIYUAN UNIV OF TECH
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