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Vanadium-doped cobalt phosphide nano-thorn catalytic material used for overall water-splitting reaction

A catalytic material, cobalt phosphide technology, applied in physical/chemical process catalysts, electrolysis processes, electrolysis components, etc., can solve the problems of expensive platinum-based precious metal water electrolysis catalysts and poor performance of non-precious metal water electrolysis catalysts, and achieve high performance. , good stability and repeatability, and the effect of high current density

Inactive Publication Date: 2020-03-31
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that platinum-based precious metal electrolytic water catalysts are expensive and non-noble metal electrolytic water catalysts have poor performance, and provide a vanadium-doped cobalt phosphide nanothorn catalytic material for total water splitting reaction, which is a heterogeneous It has a high OER and HER catalytic activity, and it performs well in the total water splitting reaction in alkaline media.

Method used

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  • Vanadium-doped cobalt phosphide nano-thorn catalytic material used for overall water-splitting reaction
  • Vanadium-doped cobalt phosphide nano-thorn catalytic material used for overall water-splitting reaction
  • Vanadium-doped cobalt phosphide nano-thorn catalytic material used for overall water-splitting reaction

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Experimental program
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Effect test

Embodiment 1

[0034] Step 1. Hydrothermal synthesis of vanadium-doped cobalt oxide cobalt hydroxide precursor grown on carbon cloth:

[0035] Cut the carbon cloth into a size of 1cm×4cm, take 30ml of concentrated nitric acid (68%) and put the cut carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, transfer it to an electric blast drying oven, set The temperature is 90°C, and the holding time is 3 hours. After the waiting is over, the pretreatment of the carbon cloth is completed by ultrasonic cleaning with ethanol and deionization for 5 minutes respectively. Next is hydrothermal treatment, weigh 0.1mM VCl 3 (vanadium trichloride), 2mMCo(NO 3 ) 2 (cobalt nitrate hexahydrate), 6mMH 4 FN (ammonium fluoride), 10mMCH 4 N 2 O (urea) was sequentially added to 30 mL of deionized water, and magnetically stirred for 30 min to ensure that the raw materials were evenly mixed. After the precursor mixed solution is stirred evenly, add it and a piece of pretreated carbon clot...

Embodiment 2

[0039] Step 1. Hydrothermal synthesis of vanadium-doped cobalt oxide cobalt hydroxide precursor grown on carbon cloth:

[0040] Cut the carbon cloth into a size of 1cm×4cm, take 30ml of concentrated nitric acid and the cut carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, transfer it to an electric blast drying oven, set the temperature at 90°C , the holding time is 3 hours, after the waiting is over, further ultrasonic cleaning with ethanol and deionization is performed, and the pretreatment of the carbon cloth is completed. Next is hydrothermal treatment, weigh 0.15mM VCl 3 (vanadium(III) chloride), 3mMCo(NO 3 ) 2 (cobalt nitrate hexahydrate), 9mMH 4 FN (ammonium fluoride), 15mMCH 4 N 2 O (urea) was sequentially added to 30 mL of deionized water, and magnetically stirred for 30 min to ensure that the raw materials were evenly mixed. After the precursor mixed solution is stirred evenly, add it and a piece of pretreated carbon cloth with a size ...

Embodiment 3

[0044] Step 1. Hydrothermal synthesis of vanadium-doped cobalt oxide cobalt hydroxide precursor grown on carbon cloth:

[0045] Cut the carbon cloth into a size of 1cm×4cm, take 30ml of concentrated nitric acid and the cut carbon cloth into a stainless steel autoclave with polytetrafluoroethylene, transfer it to an electric blast drying oven, set the temperature at 90°C , the holding time is 3 hours, after the waiting is over, further ultrasonic cleaning with ethanol and deionization is performed, and the pretreatment of the carbon cloth is completed. Next is hydrothermal treatment, weigh 0.1mM VCl 3 (vanadium(III) chloride), 2mMCo(NO 3 ) 2 (cobalt nitrate hexahydrate), 6mMH 4 FN (ammonium fluoride), 10mMCH 4 N 2 O (urea) was sequentially added to 30 mL of deionized water, and magnetically stirred for 30 min to ensure that the raw materials were evenly mixed. After the precursor mixed solution is stirred evenly, add it and a piece of pretreated carbon cloth with a size o...

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Abstract

The invention discloses a vanadium-doped cobalt phosphide nano-thorn catalytic material used for overall water-splitting reaction. A method includes: (1) performing hydrothermal synthesis to obtain avanadium-doped cobalt oxide / cobalt hydroxide growing on carbon fabric; (2) performing phosphorization to prepare the vanadium-doped cobalt phosphide nano-thorn catalytic material growing on the carbonfabric. The catalytic material not only has great overall water-splitting catalytic activity, is simple in preparation process, has great stability and repeatability, and shows certain industrial andcommercial values.

Description

technical field [0001] The invention relates to the technical field of total water splitting catalyst production, in particular to a vanadium-doped cobalt phosphide nano-thorn catalytic material for total water splitting reaction. Background technique [0002] The problems of global warming and shortage of fossil energy have not been fundamentally resolved. In recent years, hydrogen energy has been sought after by more and more researchers because of its perfect characteristics of no pollution, high calorific value, and recyclability. However, the production efficiency and cost of hydrogen energy limit its widespread development. Electrocatalytic water splitting is considered to be a very promising approach for sustainable hydrogen, including anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER). [0003] The development of a high-performance and low-cost catalytic material for total water splitting is crucial for the electrolysis of water to...

Claims

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Application Information

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IPC IPC(8): B01J27/198C25B1/04C25B11/06
CPCB01J27/198C25B1/04C25B11/051C25B11/091B01J35/33Y02E60/36
Inventor 张明杜相恒管继彪
Owner ZHEJIANG SCI-TECH UNIV
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