Preparation method of multi-element metal phosphorus-doped electrocatalyst based on binary LDH derivation

An electrocatalyst, multi-metal technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited research, high overpotential, limited non-precious metal-based materials, etc. Excellent performance, good electrical conductivity, the effect of improving material performance

Inactive Publication Date: 2020-05-08
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current reports on non-noble metal-based materials as OER catalysts are still very limited, and their application in the OER reaction process is still limited by the high overpotential.

Method used

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  • Preparation method of multi-element metal phosphorus-doped electrocatalyst based on binary LDH derivation
  • Preparation method of multi-element metal phosphorus-doped electrocatalyst based on binary LDH derivation
  • Preparation method of multi-element metal phosphorus-doped electrocatalyst based on binary LDH derivation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of CoMo-LDH-CF:

[0026] (a) Mix 20 mL of ethylene glycol and 5 mL of deionized water to obtain a mixed solvent;

[0027] (b) 40mg CoCl 2 ·6H 2 O, 20mg MoCl 2 Dissolve 120mg urea in the mixed solvent of step (a) and stir evenly to obtain solution A;

[0028] (c) Pour solution A into the reaction kettle, then add 1cm*4cm hydrophilic carbon cloth, and react in an oven at 180℃ for 15h to obtain CoMo-LDH-CF-1;

[0029] (2) Preparation of CoMo-P-CF:

[0030] Place the CoMo-LDH-CF-1 material obtained in step (1) in a tube furnace, and place a magnetic boat containing 100 mg of sodium hydrogen hypophosphite upstream of it, and set it at a temperature of 6°C / min in a nitrogen atmosphere. The temperature rise rate is to raise the reactant to 400° C. and keep it for 3 hours, and then cool to room temperature to obtain the metal phosphorus-doped electrocatalyst CoMo-P-CF-1 derived from the binary LDH containing Co and Mo bimetal.

[0031] Combine figure 1 , 2 It can be seen ...

Embodiment 2

[0034] (1) Preparation of CoMo-LDH-CF:

[0035] (a) Mix 20 mL of ethylene glycol and 5 mL of deionized water to obtain a mixed solvent;

[0036] (b) Add 60mg CoCl 2 ·6H 2 O, 20mg MoCl 2 Dissolve 120mg urea in the mixed solvent of step (a) and stir evenly to obtain solution A;

[0037] (c) Pour solution A into the reaction kettle, then add 1cm*4cm hydrophilic carbon cloth, and react in an oven at 120°C for 15h to obtain CoMo-LDH-CF-2;

[0038] (2) Preparation of CoMo-P-CF:

[0039] Place the CoMo-LDH-CF-2 material obtained in step (1) in a tube furnace, and place a magnetic boat containing 100 mg of sodium hydrogen hypophosphite upstream of it, and place it in a nitrogen atmosphere at 6°C / min The temperature rise rate is to increase the temperature of the reactant to 400° C. and keep it for 3 hours, and then cool to room temperature to obtain a metal phosphorus-doped electrocatalyst CoMo-P-CF-2 derived from a binary LDH containing Co and Mo bimetal.

[0040] The CoMo-LDH-CF-2 material is...

Embodiment 3

[0042] (1) Preparation of CoMo-LDH-CF:

[0043] (a) Mix 20 mL of ethylene glycol and 5 mL of deionized water to obtain a mixed solvent;

[0044] (b) Add 80mg CoCl 2 ·6H 2 O, 20mg MoCl 2 Dissolve 120mg urea in the mixed solvent of step (a) and stir evenly to obtain solution A;

[0045] (c) Pour solution A into the reaction kettle, then add 1cm*4cm hydrophilic carbon cloth, and react in an oven at 180°C for 15h to obtain CoMo-LDH-CF-3;

[0046] (2) Preparation of CoMo-P-CF:

[0047] Place the CoMo-LDH-CF-3 material obtained in step (1) in a tube furnace, and place a magnetic boat containing 100 mg of sodium hydrogen hypophosphite upstream of it, and place it in a nitrogen atmosphere at 6°C / min The temperature increase rate is to increase the temperature of the reactant to 400° C. and keep it for 3 hours, and then cool to room temperature to obtain a metal phosphorus-doped electrocatalyst CoMo-P-CF-3 derived from a binary LDH containing Co and Mo bimetal.

[0048] The CoMo-LDH-CF-3 materia...

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Abstract

The invention discloses a multi-element metal phosphorus-doped electrocatalyst based on binary LDH derivation. A preparation method for the multi-element metal phosphorus-doped electrocatalyst comprises the following steps: 1) mixing ethylene glycol and deionized water to obtain a mixed solvent; 2) dissolving a cobalt salt, a molybdenum salt and urea in the mixed solvent, and carrying out uniformstirring to obtain a solution A; 3) adding hydrophilic carbon cloth into the solution A, and carrying out a reaction to obtain CoMo-LDH-CF; and 4) placing the CoMo-LDH-CF material in a tubular furnace, placing a magnetic boat filled with sodium hydrogen hypophosphite at the upper stream of the tubular furnace, raising a temperature in an inert atmosphere, keeping the temperature, and carrying outcooling to room temperature to obtain the binary LDH-derived metal phosphorus-doped electrocatalyst CoMo-P-CF containing double metals, i.e., Co and Mo. After the cobalt-molybdenum bimetallic LDH material growing on the carbon cloth is synthesized by a hydrothermal method, the cobalt-molybdenum bimetallic LDH material is subjected to high-temperature heat treatment and reacts with sodium hydrogenhypophosphite to obtain a Co-and-Mo-containing bimetallic binary phosphorus-doped electrocatalytic material with a large specific surface area and a regular structure, and the material has the advantages of accurate and controllable composition and favorable conductivity.

Description

Technical field [0001] The invention belongs to the field of material chemistry, and particularly relates to a preparation method of a multi-element metal phosphorus-doped electrocatalyst derived from binary LDH. Background technique [0002] With the rapid development of social economy, energy and environment have become increasingly concerned issues, and the proportion of renewable energy such as solar and wind energy in the total energy consumption of human society has gradually increased. However, due to the intermittent and volatility of electric energy in the conversion and use of this kind of renewable energy, electrochemical energy storage and conversion technologies such as rechargeable batteries, electrochemical capacitors, electrolytic cells, and fuel cells are achieving high efficiency. And sustainable energy use will play a key role. Although their working principles are different, these electrochemical devices are composed of similar key functional components, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J35/10
CPCB01J27/19B01J35/0033B01J35/1004
Inventor 刘毅杨梦雅赵蓉王欢
Owner ZHEJIANG UNIV
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