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Preparation method of hollow Ni2P/Co2P/Fe2P nano-composite electrocatalyst

A technology of nanocomposite and nanocomposite materials, which is applied in the field of preparation of hollow Ni2P/Co2P/Fe2P nanocomposite electrocatalysts, which can solve the problems of general electrocatalytic oxygen evolution performance, complex synthesis process and low output, and achieve high electrocatalytic performance As well as stability, simple synthesis process, and the effect of reducing transfer internal resistance

Active Publication Date: 2019-10-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its synthesis process is complicated, the yield is low, and its electrocatalytic oxygen evolution performance is general.

Method used

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  • Preparation method of hollow Ni2P/Co2P/Fe2P nano-composite electrocatalyst
  • Preparation method of hollow Ni2P/Co2P/Fe2P nano-composite electrocatalyst
  • Preparation method of hollow Ni2P/Co2P/Fe2P nano-composite electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 0.86g nickel acetate (Ni(CH 3 COO) 2 4H 2 O), 0.43g cobalt acetate (Co(CH 3 COO) 2 4H 2 (0) and 3g of polyvinylpyrrolidone (PVP), dissolved in 200ml of ethanol, ultrasonically dispersed to form a uniform solution, and then stirred for 30 minutes, then the above mixed solution was transferred to a round-bottomed flask, reflux reaction by condensation, through 85 ℃ , and reacted for 4 hours. After naturally cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and the precipitate was dried to obtain nickel precursor nano-squares.

[0024] (2) Dissolve the nickel-cobalt precursor of 40mg in the ethanol of 5ml and disperse the ultrasound, then take 30mg of potassium ferricyanide (K 3 [Fe(CN) 6 ]) dissolved in 20ml ethanol and 20ml water, after ultrasonic dispersion will contain K 3 [Fe(CN) 6 ] The solution is poured into the nickel-cobalt precursor. React at room temperature for 10 minutes, wash the sample with deio...

Embodiment 2

[0031] (1) Weigh 0.86g nickel acetate (Ni(CH 3 COO) 2 4H 2 O), 0.43g cobalt acetate (Co(CH 3 COO) 2 4H 2 (0) and 3g of polyvinylpyrrolidone (PVP), dissolved in 200ml of ethanol, ultrasonically dispersed to form a uniform solution, and then stirred for 30 minutes, then the above mixed solution was transferred to a round-bottomed flask, reflux reaction by condensation, through 85 ℃ , and reacted for 4 hours. After naturally cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and the precipitate was dried to obtain nickel precursor nano-squares.

[0032] (2) Dissolve the nickel-cobalt precursor of 40mg in the ethanol of 5ml and disperse the ultrasound, then take 40mg of potassium ferricyanide (K 3 [Fe(CN) 6 ]) dissolved in 20ml ethanol and 20ml water, after ultrasonic dispersion will contain K 3 [Fe(CN) 6 ] The solution is poured into the nickel-cobalt precursor. React at room temperature for 10 minutes, wash the sample with deio...

Embodiment 3

[0040] (1) Weigh 0.86g nickel acetate (Ni(CH 3 COO) 2 4H 2 O), 0.43g cobalt acetate (Co(CH 3 COO) 2 4H 2 (0) and 3g of polyvinylpyrrolidone (PVP), dissolved in 200ml of ethanol, ultrasonically dispersed to form a uniform solution, and then stirred for 30 minutes, then the above mixed solution was transferred to a round-bottomed flask, reflux reaction by condensation, through 85 ℃ , and reacted for 4 hours. After naturally cooling to room temperature, the sample was washed with deionized water and absolute ethanol, and the precipitate was dried to obtain nickel precursor nano-squares.

[0041] (2) Dissolve the nickel-cobalt precursor of 40mg in the ethanol of 5ml and disperse the ultrasound, then take 50mg of potassium ferricyanide (K 3 [Fe(CN) 6 ]) dissolved in 20ml ethanol and 20ml water, after ultrasonic dispersion will contain K 3 [Fe(CN) 6 ] The solution is poured into the nickel-cobalt precursor. React at room temperature for 10 minutes, wash the sample with deio...

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Abstract

The invention discloses a preparation method of a hollow Ni2P / Co2P / Fe2P nano-composite electrocatalyst. The method comprises the following steps: preparing a nickel-cobalt precursor, used as a template, by using nickel acetate, cobalt acetate and polyvinylpyrrolidone as reaction materials and ethanol as a reaction solvent, adding potassium ferricyanide, and preparing a hollow Prussian blue analogthrough room temperature stirring by using ethanol and water as reaction solvents; and phosphating PBA in a tubular furnace at a low temperature with sodium hypophosphite as a phosphorus source to prepare the hollow Ni2P / Co2P / Fe2P nano-composite material. The hollow Ni2P / Co2P / Fe2P nano-composite electrocatalyst prepared in the invention has the advantages of high repeatability, simple and high preparation process, and superior catalytic activity and stability in electrocatalytic oxygen evolution reactions.

Description

technical field [0001] The invention belongs to the field of preparation technology and application of nanometer materials and electrocatalysts, specifically a hollow Ni 2 P / Co 2 P / Fe 2 Preparation method of P nanocomposite electrocatalyst. Background technique [0002] Electrocatalytic oxygen evolution reaction (Oxygen evolution reaction, OER) plays an important role in energy conversion and storage. The biggest bottleneck for OER reaction is its slow kinetic process, and noble metals Ru-based and Ir-based are often used as catalysts. However, the scarcity, high cost, and low selectivity of noble metal-based catalysts greatly limit their wide application. Therefore, developing an electrocatalyst to replace noble metals is a research focus in this field. In order to find an ideal OER catalyst with low cost, high chemical stability and excellent performance that can replace traditional noble metal catalysts, transition metal nitrides, sulfides, oxides, phosphides and othe...

Claims

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Application Information

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IPC IPC(8): B01J27/185C25B11/06C25B1/04
CPCB01J27/1853C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 郝青丽何斌雷武夏锡锋丹尼尔·曼德勒
Owner NANJING UNIV OF SCI & TECH
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