Non-noble metal oxygen evolution catalyst CuNiS2 with controllable shape

A catalyst and oxygen evolution technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low catalytic efficiency and high catalyst cost, and achieve low resistance and good oxygen evolution catalytic performance , the effect of increasing conductivity

Inactive Publication Date: 2015-12-16
LANZHOU UNIVERSITY
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Problems solved by technology

[0003] In order to solve the problems of high catalyst cost and low catalytic efficiency in the prior art

Method used

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  • Non-noble metal oxygen evolution catalyst CuNiS2 with controllable shape
  • Non-noble metal oxygen evolution catalyst CuNiS2 with controllable shape
  • Non-noble metal oxygen evolution catalyst CuNiS2 with controllable shape

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Experimental program
Comparison scheme
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Embodiment

[0025] The water used in the experiment was ultrapure water with a conductivity of 18.25MΩ, and the reagents used in the experiment were all analytically pure.

[0026] Instruments and reagents used:

[0027] CHI660E electrochemical workstation (Shanghai Chenhua Instrument Co., Ltd.) was used for cyclic voltammetry experiments; the ultrapure water device (Chengdu Ultrapure Technology Co., Ltd.) of Youput Laboratory was used to prepare ultrapure water; the electronic balance (Shanghai Bole Electromechanical Co., Ltd.) Equipment Co., Ltd.) for weighing drugs; D / max-2400 (Japan Rigaku, Rigaku) ​​for X-ray diffraction characterization; JSM-6701F cold field emission scanning electron microscope (Japan Electronics Co., Ltd.) for morphology characterization of hydrogen evolution catalysis ; micro laser Raman spectrometer (Jobin-Yvon, France) is used for the characterization of hydrogen evolution catalyst; vacuum drying oven (Shanghai Yiheng Scientific Instrument Co., Ltd.); KQ5200 ul...

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Abstract

The invention discloses a non-noble metal oxygen evolution catalyst CuNiS2 with high activity, high stability and controllable shape, and discloses a preparation method and application thereof. The catalyst is prepared by a method for high-temperature thermal injection, the operation is simple, and the aim of controllable synthesis of the shapes of nano particles is fulfilled. According to the preparation method, on the basis of a synthesized CuS nano hexagon, a nickel source is added into the system, so that a nano sheet CuNiS2 with an irregular edge structure is synthesized; therefore, the relative specific surface area of the catalyst system is enlarged; due to the special irregular edge structure, the oxygen evolution material has a large quantity of active sites, and metal nickel is extremely high in conductivity, so that the conductivity of the whole system is improved, the kinetic rate of electronic transmission is increased, and the activity of the material is enhanced.

Description

technical field [0001] The invention relates to a chemical oxygen evolution catalyst and a preparation method thereof, in particular to a non-precious metal CuNiS 2 . Background technique [0002] The rapid economic development has inspired people to explore reversible energy conversion and storage systems, such as zinc-air batteries and renewable fuel cells, which have been extensively studied. At present, the working voltage of domestic industrial water electrolyzers is generally between 2.1 and 2.4V, and the cell voltage of some new foreign electrolyzers is also between 1.9 and 2.1V, which is much higher than the theoretical decomposition voltage of water, which is 1.229V. very low. According to calculations, if the tank voltage of the water electrolyzer currently in use in China can be reduced by about 0.2V, the value of electric energy that can be saved exceeds 1 billion yuan per year. Based on the above reasons, people have been exploring a catalyst that can reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043
Inventor 席聘贤安丽殷杰
Owner LANZHOU UNIVERSITY
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