Non-noble metal oxygen evolution reaction catalyst and preparation method thereof

An oxygen evolution reaction, non-precious metal technology, used in oxygen preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor stability and high cost, improve kinetic process, reduce energy barrier and enhance the effect of electron transfer

Inactive Publication Date: 2018-04-20
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional oxygen evolution reaction catalysts are mostly noble metals (Ir and Ru) or co

Method used

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  • Non-noble metal oxygen evolution reaction catalyst and preparation method thereof
  • Non-noble metal oxygen evolution reaction catalyst and preparation method thereof
  • Non-noble metal oxygen evolution reaction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a non-noble metal oxygen evolution reaction catalyst, that is, cobalt-doped Cu 7 S 4 , the doping amount of cobalt is 7% of the total molar weight of Cu and Co in this catalyst (catalyst is recorded as Co-Cu 7 S 4 -0.07);

[0023] Concrete preparation method comprises the following steps:

[0024] (a) 193.14mg of cuprous thiocyanate and 40.7mg of cobalt acetylacetonate are mixed and poured into a 250ml flask;

[0025] (b) Add 100ml of oleic acid to the flask and stir evenly, then continuously feed argon into the flask for 20 minutes, first raise the temperature to 140°C, and continue for 30 minutes; continue to heat up to 240°C, and react for 30 minutes;

[0026] (c) Transfer the flask into ice water to cool down quickly, take out the reaction product and add it to alcohol for centrifugal cleaning; then transfer it to the refrigerator and freeze it into a solid state, which can be obtained after freeze-drying, and its appearance is as follow...

Embodiment 2

[0028] This embodiment provides a non-noble metal oxygen evolution reaction catalyst (the catalyst is denoted as Co-Cu 7 S 4 -0.035), Cu 7 S 4 Cobalt is doped in the crystal, and the doping amount of cobalt is 3.5% of the total molar weight of Cu and Co in this catalyst; Its preparation method is basically the same as that in Example 1, and difference is: in step (a), will 193.14mg of cuprous thiocyanate and 20.4mg of cobalt acetylacetonate were mixed and poured into a 250ml flask.

Embodiment 3

[0030] This embodiment provides a non-noble metal oxygen evolution reaction catalyst (the catalyst is denoted as Co-Cu 7 S 4 -0.14), Cu 7 S 4 Cobalt is doped in the crystal, and the doping amount of cobalt is 14% of the total molar weight of Cu and Co in this catalyst, and its preparation method is basically the same as that in Example 1, and difference is: in step (a), will 193.14mg of cuprous thiocyanate and 81.4mg of cobalt acetylacetonate were mixed and poured into a 250ml flask.

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PUM

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Abstract

The invention relates to a non-noble metal oxygen evolution reaction catalyst and a preparation method thereof. The non-noble metal oxygen evolution reaction catalyst is cobalt-doped Cu7S4 nanosheet;cobalt is doped into Cu7S4 nanosheet crystal, and the doping amount is 3.5-14% of the total molar amount of Cu and Co in the non-noble metal oxygen evolution reaction catalyst. Because of doping of acertain amount of cobalt on the basis of the Cu7S4 crystal, an electrochemically catalyzed active center structure is regulated and electron transfer between Cu and Co active sites is enhanced, so that an energy barrier for conversion of the catalyst to an intermediate product thereof is reduced; namely, a phase transition caused by Co doping reduces energy required for electron escape, the kinetic process of Cu7S4 in an oxygen evolution reaction is improved, and the purpose of improving the catalytic performance is achieved.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to an oxygen evolution reaction catalyst, in particular to a non-noble metal oxygen evolution reaction catalyst and a preparation method thereof. Background technique [0002] Due to global warming and the gradual depletion of fossil energy, the development and research of clean energy has received more and more attention. Such as hydrogen-oxygen fuel cells, metal-air batteries, electrolyzed water, etc., are potential substitutes for fossil energy. These devices are still in the research and development stage. To achieve breakthrough development, it is necessary to start with its electrochemical reaction process . The oxygen evolution reaction between the cathode and the anode is one of the key reactions, but due to its extremely slow kinetic process, a catalyst for promoting the reaction is particularly necessary. Traditional oxygen evolution reaction catalysts are mostly noble metals (Ir ...

Claims

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Application Information

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IPC IPC(8): B01J27/043C01B13/02
CPCB01J27/043C01B13/02
Inventor 王显福李群晏成林
Owner SUZHOU UNIV
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