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Preparation method of oxygen evolution reaction electrocatalyst with loading Co3O4 on BCNO nano-sheet

A technology of oxygen evolution reaction and electrocatalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problems of poor electrocatalytic performance of oxygen evolution reaction, complex composite method of carbon-based materials, and poor stability. Achieve good electrocatalytic water oxidation performance, low preparation equipment requirements, and good electrical conductivity

Active Publication Date: 2018-11-23
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to aim at pure phase Co 3 o 4 The electrocatalytic performance of the oxygen evolution reaction is poor, and the compounding method with carbon-based materials is complicated and the stability is poor. It provides a simple, feasible and one-step method for the large-scale preparation of BCNO nanosheets loaded with Co 3 o 4 Synthesis of electrocatalysts for the oxygen evolution reaction to enhance their performance as catalysts

Method used

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  • Preparation method of oxygen evolution reaction electrocatalyst with loading Co3O4 on BCNO nano-sheet
  • Preparation method of oxygen evolution reaction electrocatalyst with loading Co3O4 on BCNO nano-sheet
  • Preparation method of oxygen evolution reaction electrocatalyst with loading Co3O4 on BCNO nano-sheet

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Experimental program
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Embodiment 1

[0029] Step 1: Add 0.2 mmol of cobalt acetate to 25 mL of ethylene glycol and heat and stir at 25°C for 30 minutes;

[0030] Step 2: Add the weighed 2mmol boric acid and 4mmol melamine into the cobalt acetate solution in step 1, heat and stir at 110°C, stop stirring after the boric acid and melamine are completely dissolved, and then heat at 110°C for 4 hours until the Wherein ethylene glycol is evaporated to dryness, obtains the BCNO nano sheet precursor of loading cobalt acetate;

[0031] Step 3: Sinter the cobalt acetate / BCNO nanosheet precursor prepared in step 2 at 500°C, the heating rate is 5°C per minute, and the sintering time is 5 hours. Get Co in minutes 3 o 4 / BCNO nanosheet composite catalyst powder;

[0032] Step 4: Add 5mg of Co 3 o 4 / BCNO nanosheet composite catalyst powder was added to a mixed solution of 750 μL deionized water and 250 μL isopropanol, and after ultrasonication for 30 minutes, 30 μL of 5% perfluorosulfonic acid solution was added to contin...

Embodiment 2

[0034] Other steps are with embodiment 1, and difference is that the cobalt acetate in step 1 is changed into 0.4mmol by 0.2mmol;

Embodiment 3

[0036] Other steps are with embodiment 1, and difference is that the cobalt acetate in step 1 is changed into 0.6mmol by 0.2mmol;

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Abstract

The invention discloses a preparation method of an oxygen evolution reaction electrocatalyst with loading Co3O4 on a BCNO nano-sheet. The preparation method comprises the following steps of by adopting ethylene glycol as a solvent and utilizing boric acid, melamine and cobalt acetate as raw material, performing condensation on boric acid and melamine in ethylene glycol to form a BCNO nano-sheet precursor, and performing one-time sintering in a muffle furnace without a protective atmosphere to synthesize a Co3O4 / BCNO nano-sheet composite catalyst. The Co3O4 / BCNO nano-sheet composite catalyst has relatively high electro-catalytic property and electrochemical stability and can be used in the field of development of zinc-air batteries and clean energy and the like as the oxygen evolution reaction electrocatalyst.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, more specifically, it is a method of loading Co on BCNO nanosheets by solid phase sintering. 3 o 4 Preparation and application as electrocatalyst for oxygen evolution reaction. Background technique [0002] The current oxygen evolution reaction electrocatalysts are based on noble metal oxides such as iridium dioxide (IrO 2 ) or ruthenium dioxide (RuO 2 ) mainly, although they have high catalytic performance, they are expensive, scarce resources, high synthesis cost, poor stability in the catalytic process, and easy to dissolve under acidic or alkaline reaction conditions. Therefore, the development and application of non-noble metal oxides, especially transition metal oxides, as electrocatalysts for the oxygen evolution reaction has attracted extensive attention and research by researchers. co 3 o 4 (Cobalt tetroxide) is an electrocatalytic material with great application p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCC25B1/04B01J27/24C25B11/077C25B11/057B01J35/33Y02E60/36
Inventor 张兴华冀雪峰贾小波卢遵铭李兰兰杨晓婧刘辉
Owner HEBEI UNIV OF TECH
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