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Preparation method of VN@Co electrocatalyst

An electrocatalyst, cobalt chloride hexahydrate technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problem of reducing electrochemical specific surface area and catalytic effect, unsuitable for large-scale industrial production, nitrogen The catalytic activity of vanadium is not high, and the effect of long service life, long life and small overpotential is achieved.

Inactive Publication Date: 2019-12-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since vanadium nitride is prone to spontaneous agglomeration during the synthesis process, the electrochemical specific surface area and catalytic effect will be reduced, and the vanadium nitride synthesized in the prior art has poor crystallinity and fewer active sites, and the overall vanadium nitride The catalytic activity is not high, and the process for preparing vanadium nitride in the prior art is also relatively complicated, which is not suitable for large-scale industrial production

Method used

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  • Preparation method of VN@Co electrocatalyst
  • Preparation method of VN@Co electrocatalyst
  • Preparation method of VN@Co electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) The raw materials of urea, ammonium metavanadate, cobalt chloride hexahydrate, and sodium hypophosphite are batched according to the following mass composition ratio: CH 4 N 2 O: NH 4 VO 3 :CoCl 2 *6H 2 O:NaH 2 PO 2 =8:1:1:6;

[0024] 2) After mixing the urea, ammonium metavanadate and cobalt chloride hexahydrate after step 1 proportioning, the grinding time is 20min, after grinding, the mixture is passed through a 60-mesh sieve, and the mixture with larger particle size is screened out. Put the ground mixture into a small porcelain boat, place the small porcelain boat at one end of the large porcelain boat, add the sodium hypophosphite after step 1 ratio to the other end of the large porcelain boat, and place the large porcelain boat in a tubular atmosphere In the furnace, connect one end of the tubular atmosphere furnace containing sodium hypophosphite to the air inlet, and add two furnace plugs at both ends of the tubular atmosphere furnace;

[0025] 3) Pa...

Embodiment 2

[0028] 1) The raw materials of urea, ammonium metavanadate, cobalt chloride hexahydrate, and sodium hypophosphite are batched according to the following mass composition ratio: CH 4 N 2 O: NH 4 VO 3 :CoCl 2 *6H 2 O:NaH 2 PO 2 =9:2:2:7;

[0029] 2) After mixing the urea, ammonium metavanadate, and cobalt chloride hexahydrate after the proportioning of step 1, grind the mixture for 25 minutes, then pass the mixture through a 60-mesh sieve after grinding, and sieve out the mixture with larger particle size. Put the ground mixture into a small porcelain boat, place the small porcelain boat at one end of the large porcelain boat, add the sodium hypophosphite after step 1 ratio to the other end of the large porcelain boat, and place the large porcelain boat in a tubular atmosphere In the furnace, connect one end of the tubular atmosphere furnace containing sodium hypophosphite to the air inlet, and add two furnace plugs at both ends of the tubular atmosphere furnace;

[0030...

Embodiment 3

[0033] 1) The raw materials of urea, ammonium metavanadate, cobalt chloride hexahydrate, and sodium hypophosphite are batched according to the following mass composition ratio: CH 4 N 2 O: NH 4 VO 3 :CoCl 2 *6H 2 O:NaH 2 PO 2 =10:3:3:8;

[0034] 2) After mixing the urea, ammonium metavanadate, and cobalt chloride hexahydrate after the proportioning of step 1, grind the mixture for 28 minutes, and then pass the mixture through a 60-mesh sieve after grinding, and sieve out the mixture with larger particle size. Put the ground mixture into a small porcelain boat, place the small porcelain boat at one end of the large porcelain boat, add the sodium hypophosphite after the ratio in step 1 to the other end of the large porcelain boat, and place the large porcelain boat in a tubular atmosphere In the furnace, connect one end of the tubular atmosphere furnace containing sodium hypophosphite to the air inlet, and add two furnace plugs at both ends of the tubular atmosphere furna...

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Abstract

The invention provides a preparation method of a VN@Co electrocatalyst. The preparation method includes the steps of: (1) proportioning urea, ammonium metavanadate, cobalt chloride hexahydrate and sodium hypophosphite in mass ratio to obtain raw materials; 2) grinding the raw materials, and then putting the ground raw materials into a tubular atmosphere furnace; 3) heating the tubular atmosphere furnace in an inert atmosphere and performing heat preservation; and 4) grinding the reaction product to obtain the VN@Co electrocatalyst. The method provided by the invention has simple process, the obtained VN@Co electrocatalyst has the characteristics of excellent electrocatalytic activity, little additional energy consumption during electrolysis, long service life, and high electrocatalytic activity.

Description

technical field [0001] The invention relates to electrocatalytic electrolysis of water, in particular to a preparation method of a VN@Co electrocatalyst. Background technique [0002] Fossil fuels are widely used in daily life, but due to lack of sustainability and serious impact on the environment, fossil fuels have aroused widespread doubts from energy experts and environmentalists. Hydrogen, as a new generation of sustainable and clean energy, can maintain the cleanliness of the environment, has potential renewable capabilities, and has high energy density. It is considered to be an almost perfect energy source and energy carrier. Although hydrogen energy is the most attractive and environmentally friendly energy source, the technology for producing hydrogen is not yet mature, and the processes and materials currently used to produce hydrogen have become the focus of exploration. Due to production cost issues, more than 96% of hydrogen energy comes from fossil fuels, how...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04C25B11/06
CPCB01J27/24C25B1/04C25B11/091B01J35/23B01J35/33Y02E60/36
Inventor 黄剑锋李帅楠冯亮亮曹丽云冯永强陈俊生
Owner SHAANXI UNIV OF SCI & TECH
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