Nickel-cobalt bimetallic phosphide electrocatalyst as well as synthesis method and application thereof

A phosphide electro-synthesis method technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of cost limitation and high scarcity, and achieve convenient operation, simple steps, and increased ratio The effect of surface area

Inactive Publication Date: 2019-07-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metals such as Ir and Ru and their oxides have excellent catalytic activity for electrocatalytic oxygen generation, but their scarcity and high cost limit their wide application.

Method used

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  • Nickel-cobalt bimetallic phosphide electrocatalyst as well as synthesis method and application thereof
  • Nickel-cobalt bimetallic phosphide electrocatalyst as well as synthesis method and application thereof
  • Nickel-cobalt bimetallic phosphide electrocatalyst as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of nickel cobalt phosphorus double metal phosphide:

[0029] (1) Weigh 0.1330g of potassium cobaltcyanide and dissolve in 20mL of deionized water until a clear solution A is formed. Weigh 0.1426g of nickel chloride hexahydrate and 0.2353g of trisodium citrate and dissolve in 20mL of deionized water to form a clear solution B. Pour solution A into solution B, stir well and leave to age for 5 days. Wash with ethanol and deionized water by centrifugation three times, and then dry in a vacuum oven. A gray-blue sample NiCo-PBA was obtained.

[0030] (2) Weigh 20 mg of the above-prepared NiCo-PBA precursor and add it to 10 mL of ethanol and stir evenly. Measure 2.5 mL of ammonia water and add 20 mL of deionized water, and slowly add it dropwise to the ethanol containing NiCo-PBA, stir for 60 min, and centrifuge Wash with water and alcohol, and dry to obtain hollow NiCo-PBA-60.

[0031] (3) Weigh 0.6gNaH 2 PO 2 Place it upstream of the semi-c...

Embodiment 2

[0033] A kind of preparation method of nickel cobalt phosphorus double metal phosphide:

[0034] The preparation method of the electrocatalytic material is basically the same as that of Example 1, except that the amount of ammonia water is 5 mL.

Embodiment 3

[0036] A kind of preparation method of nickel cobalt phosphorus double metal phosphide:

[0037] (1) Weigh 0.1330g of potassium cobaltcyanide and dissolve in 20mL of deionized water until a clear solution A is formed. Weigh 0.1764g of nickel nitrate hexahydrate and 0.2647g of trisodium citrate and dissolve in 20mL of deionized water to form a clear solution B. Pour solution A into solution B, stir well and leave to age for 3 days. Wash with ethanol and deionized water by centrifugation three times, and then dry in a vacuum oven. A gray-blue sample NiCo-PBA was obtained.

[0038](2) Weigh 20 mg of the above-prepared NiCo-PBA precursor and add it to 10 mL of ethanol and stir evenly. Measure 2.5 mL of ammonia water and add 20 mL of deionized water, and slowly add it dropwise to the ethanol containing NiCo-PBA, stir for 90 min, and centrifuge Wash with water and alcohol, and dry to obtain hollow NiCo-PBA-90.

[0039] (3) Weigh 0.6gNaH 2 PO 2 Placed upstream of the semi-close...

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Abstract

The invention belongs to the field of nanomaterials, and discloses a nickel-cobalt bimetallic phosphide electrocatalyst as well as a synthesis method and an application thereof. The Prussian blue analogue precursor synthesized through simple aging reaction is further subjected to low-temperature phosphating reaction, and a NiCoP multi-hollow porous nanocube electrocatalyst is obtained. The seriesof bimetallic phosphides have lower charge transfer resistance and reaction barrier for oxygen evolution reaction, and have superior performance in electrocatalytic oxygen evolution reaction. Besides,the catalyst is low in cost and convenient to operate, adopts a simple process and has superior catalytic performance, and basic application research is provided for the materials in the field of electrocatalysis.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to the field of electrocatalyst and its preparation. More specifically, it relates to a synthesis method and application of a hollow bimetallic phosphide electrocatalyst for electrochemically splitting water to generate oxygen with high performance. Background technique [0002] Green energy is regarded as the most ideal energy carrier and energy storage method due to its advantages of cleanness, pollution-free, high efficiency, storage and transportation. Hydrogen production (HER) and oxygen production (OER) by electrolysis of water have great application prospects in the development of chemical energy storage technology due to their high efficiency, environmental friendliness, high gas purity, and strong adaptability to energy fluctuations. The half-reaction is the bottleneck to achieve water splitting. Noble metals such as Ir and Ru and their oxides have excellent catalytic act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/08C25B1/04C25B11/06
CPCB01J27/1853B01J35/0033B01J37/086C25B1/04C25B11/075Y02E60/36
Inventor 姜德立马婉霞李娣权彪鞠立新姚颖洁
Owner JIANGSU UNIV
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