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

An electrocatalyst and multi-metal technology, applied in the field of material chemistry, can solve the problems of limited research, limited non-precious metal-based materials, high overpotential, etc., and achieve the effect of improving performance, precise and controllable composition, and good electrical conductivity.

Inactive Publication Date: 2020-04-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0026] (a) Combine 24mL ethylene glycol, 4mL deionized water and 10uL NH 4 F mix to obtain a mixed solvent;

[0027] (b) 70mg NiCl 2 ·6H 2 O, 10mg FeCl 3 ·6H 2 O, 20mg MoCl 2 Dissolve 120mgurea and 120mgurea in the mixed solvent of step (a), 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 200°C for 20h to obtain NiFeMo-LDH-CF-1;

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

[0030] Place the NiFeMo-LDH-CF-1 material obtained in step 1) in a tube furnace, and place a magnetic boat containing 100mg of sodium hydrogen hypophosphite upstream of it in a nitrogen atmosphere at a heating rate of 10°C / min The reactant was heated to 500° C. and kept for 1 hour, and then cooled to room temperature to obtain a ternary LDH-derived metal phosphorus-doped electrocatalyst NiFeMo-P-CF-1.

[0031] Combine figure 1 , 2 It can be seen that the NiFeMo-LDH-CF-1 m...

Embodiment 2

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

[0035] (a) Combine 24mL ethylene glycol, 4mL deionized water and 50uL NH 4 F mix to obtain a mixed solvent;

[0036] (b) 70mg NiCl 2 ·6H 2 O, 20mg FeCl 3 ·6H 2 O, 20mg MoCl 2 Dissolve 120mgurea and 120mgurea in the mixed solvent of step (a), 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 180°C for 20h to obtain NiFeMo-LDH-CF-2;

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

[0039] Place the NiFeMo-LDH-CF-2 material obtained in step 1) in a tube furnace, and place a magnetic boat containing 100mg of sodium hydrogen hypophosphite upstream of it in a nitrogen atmosphere at a heating rate of 10°C / min The reactant was heated to 500° C. and kept for 1 hour, and then cooled to room temperature to obtain a metal phosphorus-doped electrocatalyst NiFeMo-P-CF-2 derived from ternary LDH.

[0040] Obtained NiFeMo-LDH-CF-2 material uniformly grown on the ...

Embodiment 3

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

[0043] (a) Combine 24mL ethylene glycol, 4mL deionized water and 10uL NH 4 F mix to obtain a mixed solvent;

[0044] (b) 70mg NiCl 2 ·6H 2 O, 40mg FeCl 3 ·6H 2 O, 20mg MoCl 2 Dissolve 120mgurea and 120mgurea in the mixed solvent of step (a), 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 200°C for 20h to obtain NiFeMo-LDH-CF-3;

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

[0047] Place the NiFeMo-LDH-CF-3 material obtained in step 1) in a tube furnace, and place a magnetic boat containing 80mg of sodium hydrogen hypophosphite upstream of it in a nitrogen atmosphere at a heating rate of 10°C / min The reactant was heated to 500° C. and kept for 1 hour, and then cooled to room temperature to obtain a metal phosphorus-doped electrocatalyst NiFeMo-P-CF-3 derived from ternary LDH.

[0048] Obtained NiFeMo-LDH-CF-3 material uniformly grown on the c...

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Abstract

The invention discloses a multi-element metal phosphorus-phosphorus doped electrocatalyst based on ternary LDH derivation. The preparation method of the multi-element metal phosphorus-doped electrocatalyst comprises the following steps: 1) mixing ethylene glycol, deionized water and ammonium fluoride to obtain a mixed solvent; 2) dissolving iron salt, nickel salt, molybdenum salt and urea in the mixed solvent, and uniformly stirring to obtain a solution A; 3) adding hydrophilic carbon cloth into the solution A, and carrying out a reaction to obtain NiFeMo-LDH-CF; and (4) putting the NiFeMo-LDH-CF material into a tubular furnace, putting a magnetic boat of sodium hypohydrophosphite monohydrate at the upstream of the tubular furnace, heating in an inert atmosphere, keeping the temperature, and cooling to room temperature to obtain the Ni-Fe-Mo three-metal-containing ternary LDH-derived metal phosphorus-doped electrocatalyst NiFeMo-P-CF. The Ni-Fe-Mo three-metal LDH material grown on thecarbon cloth is synthesized by a hydrothermal method, and then is subjected to high-temperature heat treatment to react with the sodium hypohydrophosphite monohydrate to obtain the Ni-Fe-Mo three-metal-containing ternary phosphorus-doped electro-catalytic material with large specific surface area and 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 ternary 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): B01J23/883B01J35/00B01J37/08B01J37/10B01J37/28
CPCB01J23/883B01J37/10B01J37/28B01J37/08B01J35/33
Inventor 刘毅杨梦雅赵蓉王欢
Owner ZHEJIANG UNIV
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