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Preparation method of electrocatalyst for oxygen evolution reaction

A technology of electrocatalyst and oxygen evolution reaction, which is applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of poor electrical conductivity, limited Pt reserves, high catalyst cost, etc., and achieve low cost, simple preparation process, and improved catalytic activity Effect

Inactive Publication Date: 2019-03-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional platinum (Pt)-based catalysts and ruthenium oxide catalysts are considered to be catalysts with excellent performance, but Pt reserves are limited and the cost of catalysts is high; non-noble metals also have good catalytic activity, and the research is also extensive, but the application is mainly limited less conductive

Method used

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  • Preparation method of electrocatalyst for oxygen evolution reaction
  • Preparation method of electrocatalyst for oxygen evolution reaction
  • Preparation method of electrocatalyst for oxygen evolution reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1) Ventilate and dry 200g of goat blood purchased on the market at 90°C for 6 hours, grind and pulverize it for 10 minutes, weigh 1.011g of the powder and put it in a porcelain boat;

[0025] 2) Place the porcelain boat in a tube furnace, fill it with nitrogen atmosphere, set the heating rate at 5°C / min, and keep it at the target temperature of 600°C for 2 hours to obtain the precursor;

[0026] 3) Take 29ml of deionized water, weigh 0.144g of cobalt acetate tetrahydrate and put it in. The precursor in step 2) is ground and put in together. After mixing, ultrasonically oscillate for 20 minutes, magnetically stir for 20 minutes, and then ultrasonically oscillate for 20 minutes ;

[0027] 4) Transfer the mixed solution in step 3) to a hydrothermal kettle, add 1ml of ammonia water, keep the hydrothermal kettle at 150°C for 2 hours, take it out, wash it with deionized water after cooling, and ventilate and dry at 60°C for 24 hours , to obtain the finished electrocatalyst Y...

Embodiment 2

[0030] 1) 230g of goat blood purchased in the market was ventilated and dried at 80°C for 5 hours, ground and pulverized for 15 minutes, and 1.004g of the powder was weighed and placed in a porcelain boat;

[0031] 2) Place the porcelain boat in a tube furnace, fill it with nitrogen atmosphere, set the heating rate at 6°C / min, and keep it at the target temperature of 650°C for 2.5h to obtain the precursor;

[0032] 3) Take 28ml of deionized water, weigh 0.299g of cobalt acetate tetrahydrate and put it in. The precursor in step 2) is ground and put in together. After mixing, ultrasonically oscillate for 25 minutes, magnetically stir for 25 minutes, and then ultrasonically oscillate for 20 minutes ;

[0033] 4) Transfer the mixture in step 3) to a hydrothermal kettle, add 2ml of ammonia water, keep the hydrothermal kettle at 160°C for 2.5h, take it out, wash it with deionized water after cooling, and place it at 65°C to ventilate and dry After 24 hours, the finished electrocata...

Embodiment 3

[0036] 1) Ventilate and dry 250g of goat blood purchased on the market at 95°C for 7 hours, grind and pulverize it for 20 minutes, weigh 1.000g of the powder and put it in a porcelain boat;

[0037] 2) Place the porcelain boat in a tube furnace, fill it with nitrogen atmosphere, set the heating rate at 8°C / min, and keep it at the target temperature of 700°C for 3 hours to obtain the precursor;

[0038] 3) Take 27ml of deionized water, weigh 0.434g of cobalt acetate tetrahydrate and put it in. The precursor in step 2) is ground and put in together. After mixing, ultrasonically oscillate for 15 minutes, magnetically stir for 15 minutes, and then ultrasonically oscillate for 25 minutes ;

[0039] 4) Transfer the mixed solution in step 3) to a hydrothermal kettle, add 3ml of ammonia water, keep the hydrothermal kettle at 170°C for 2 hours, take it out, wash it with deionized water after cooling, and place it at 55°C to ventilate and dry for 24 hours , to obtain the finished elect...

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Abstract

The invention discloses a preparation method of an electrocatalyst for oxygen evolution reaction, which comprises the following steps: (1) ventilating and drying 200-250g of goat blood at 80-95 DEG Cfor 5-7h, and grinding and crushing the dried goat blood; (2) carbonizing the powder obtained in step (1) to obtain a precursor; (3) mixing the precursor obtained in step (2) with 28-32ml of cobalt acetate solution or nickel acetate solution, and carrying out hydrothermal reaction for 2-3h; and (4) washing the product obtained in step (3) with de-ionized water and drying the product to obtain an electrocatalyst. The raw materials come from a variety of sources, are easily available, and cost low. The preparation process is simple. The preparation method can be used in large-scale production. The finished product has good catalytic performance. A catalyst with oxygen evolution reaction over-potential of 400-420 mV and TAFEL slope of 83-110mV / dec can be obtained. The performance is greatly improved compared with the existing common Pt / C catalyst.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to a preparation method of an electrocatalyst for oxygen evolution reaction. Background technique [0002] At present, the world's traditional energy sources such as oil and coal are becoming increasingly depleted, and the pollution produced is becoming more and more serious. Therefore, it is very important to find a more efficient and environmentally friendly energy source. Fuel cells are one of the solutions, and the CO contained in them 2 Catalysis, water electrolysis and oxygen evolution and hydrogen evolution reactions have become the focus of research. [0003] Oxygen evolution reaction in electrochemistry is a crucial reaction, a good catalyst for OER reaction can effectively improve energy conversion efficiency, reduce cost and prolong service life. Traditional platinum (Pt)-based catalysts and ruthenium oxide catalysts are considered to be catalysts w...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9016H01M4/9083Y02E60/50
Inventor 刘毅程远杨俊杰岑艾珈杨梦雅
Owner ZHEJIANG UNIV
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