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Copper-doped cobalt phosphide bifunctional water electrolysis catalytic material in hollow nanotube structure

A catalytic material, copper-doped technology, applied in physical/chemical process catalysts, electrolysis processes, electrolysis components, etc., can solve the problems of OER catalyst scarcity and cost, achieve large electrochemical surface area and electrochemical active sites, stability The effect of strong, huge industrial and commercial value

Active Publication Date: 2020-11-17
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of scarcity and high cost of Pt group metal-based HER catalysts and Ir / Ru compound-based OER catalysts, and provides a copper-doped cobalt phosphide bifunctional water electrolysis catalytic material with a hollow nanotube structure. It is a special hollow nanotube array structure with high HER and OER catalytic activity, and it also shows outstanding catalytic activity and long-term stability

Method used

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  • Copper-doped cobalt phosphide bifunctional water electrolysis catalytic material in hollow nanotube structure
  • Copper-doped cobalt phosphide bifunctional water electrolysis catalytic material in hollow nanotube structure
  • Copper-doped cobalt phosphide bifunctional water electrolysis catalytic material in hollow nanotube structure

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Experimental program
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Effect test

Embodiment 1

[0038] Step 1. Preparation of copper-doped cobalt oxide and cobalt hydroxide precursors grown on carbon cloth by hydrothermal process:

[0039] Weigh 0.2 mM C 4 h 6 CuO 4 ·H 2 O (copper acetate monohydrate), 2 mM Co(NO 3 ) 2 ·6H 2 O (cobalt nitrate hexahydrate), 6 mM H 4 FN (ammonium fluoride), 10 mM CH 4 N 2 O (urea), it was added to 30mL deionized water, and magnetically stirred for 20 min to ensure that the salt solution was evenly mixed. Add the precursor mixed solution and a piece of pretreated 1cm×4cm carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, and then transfer it to an electric blast drying oven, set the hydrothermal temperature to 120°C , water heating time 6h. After the hydrothermal treatment, the surface of the carbon cloth was cleaned with deionized water and then dried at 60°C for 6 hours.

[0040] Step two, phosphating:

[0041] The phosphating process is carried out in a CVD tube furnace. 5mM sodium hypophosphite is pl...

Embodiment 2

[0043] Step 1. Preparation of copper-doped cobalt oxide and cobalt hydroxide precursors grown on carbon cloth by hydrothermal process:

[0044] Weigh 0.3 mM C 4 h 6 CuO 4 ·H 2 O (copper acetate monohydrate), 3 mM Co(NO 3 ) 2 ·6H 2 O (cobalt nitrate hexahydrate), 9 mM H 4 FN (ammonium fluoride), 15 mM CH 4 N 2 O (urea), it was added to 30mL deionized water, and magnetically stirred for 20 min to ensure that the salt solution was evenly mixed. Add the precursor mixed solution and a piece of pretreated 1cm×4cm carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, and then transfer it to an electric blast drying oven, set the hydrothermal temperature to 120°C , water heating time 6h. After the hydrothermal treatment, the surface of the carbon cloth was cleaned with deionized water and then dried at 60°C for 6 hours.

[0045] Step two, phosphating:

[0046] The phosphating process is carried out in a CVD tube furnace. 5mM sodium hypophosphite is pl...

Embodiment 3

[0048] Step 1. Preparation of copper-doped cobalt oxide and cobalt hydroxide precursor grown on carbon cloth by hydrothermal process:

[0049] Weigh 0.2 mM C 4 h 6 CuO 4 ·H 2 O (copper acetate monohydrate), 2 mM Co(NO 3 ) 2 ·6H 2 O (cobalt nitrate hexahydrate), 6 mM H 4 FN (ammonium fluoride), 10 mM CH 4 N 2 O (urea), it was added to 30mL deionized water, and magnetically stirred for 20 min to ensure that the salt solution was evenly mixed. Add the precursor mixed solution and a piece of pretreated 1cm×4cm carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, and then transfer it to an electric blast drying oven, set the hydrothermal temperature to 120°C , water heating time 6h. After the hydrothermal treatment, the surface of the carbon cloth was cleaned with deionized water and then dried at 60°C for 6 hours.

[0050] Step 2, phosphating process to prepare the final copper-doped cobalt phosphide bifunctional water electrolysis catalytic mater...

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Abstract

The invention discloses a copper-doped cobalt phosphide bifunctional water electrolysis catalytic material in a hollow nanotube structure. The copper-doped cobalt phosphide bifunctional water electrolysis catalytic material comprises two steps of hydrothermal treatment and phosphatization. The copper-doped cobalt phosphide bifunctional water electrolysis catalytic material with the hollow nanotubestructure is of a special hollow nanotube array structure and has very high HER and OER catalytic activity; in addition, in an alkaline medium, the catalyst can be used as an anode material and a cathode material at the same time to be used for a full-water-splitting catalytic reaction, and excellent catalytic activity and long-term stability are also shown.

Description

technical field [0001] The invention relates to the technical field of production of water electrolysis catalytic materials, in particular to a copper-doped cobalt phosphide bifunctional water electrolysis catalytic material with a hollow nanotube structure. Background technique [0002] Renewable electrocatalytic water splitting technology for hydrogen production has been considered as the most promising way to support energy security and protect the environment. Clean and pollution-free hydrogen energy is considered to be a perfect alternative energy source to fossil energy. At present, the production of hydrogen energy mainly relies on the steam reforming of fossil fuels, but its raw material fossil energy is being increasingly exhausted, and it is urgent to find another hydrogen production technology. As we all know, water electrolysis is an advanced energy conversion technology, and the products are hydrogen and oxygen, which has attracted the attention of researchers....

Claims

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Application Information

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IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCB01J27/1853C25B1/04B01J35/33Y02E60/36
Inventor 张明杜相桓刘远建
Owner ZHEJIANG SCI-TECH UNIV
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