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Multi-level metal phosphide as well as preparation method and application thereof

A metal phosphide, multi-level technology, applied in the field of electrocatalytic materials, can solve the problem of expensive precious metals, achieve high repeatability, improve catalytic performance, and reduce overpotential effects

Active Publication Date: 2020-12-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the high price of precious metals in the prior art, the defect or deficiency of the lack of alternative bifunctional electrocatalysts with good catalytic activity, and provide a multi-level metal phosphide

Method used

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  • Multi-level metal phosphide as well as preparation method and application thereof
  • Multi-level metal phosphide as well as preparation method and application thereof
  • Multi-level metal phosphide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This example provides a multi-level metal phosphide with a special "woven bag" structure (Fe:Co=0:10, molar ratio, the same below), and its preparation process is as follows:

[0057] Nickel foam (with an average pore size of 250 microns) was ultrasonically cleaned with 1 mol / L hydrochloric acid, deionized water, and ethanol for 10 minutes respectively. Then prepare 30mL of a mixed solution of 0.1mol / L nickel chloride and 2mol / L ammonium chloride as the electrolyte, the nickel sheet as the counter electrode and reference electrode, the cleaned nickel foam as the working electrode, and submerge the nickel foam into the electrolyte 1cm 2 , in two-electrode mode with -1A cm -2 The constant current program was used for 500 seconds, and the resulting nickel foam was washed with deionized water and dried in a vacuum oven. Then soak the above 4 pieces of dried nickel foam in 25mL of an aqueous solution prepared by dissolving 1mmol of cobalt nitrate hexahydrate, 2.5mmol of am...

Embodiment 2

[0059] This example provides a multi-level iron-cobalt bimetallic phosphide (Fe:Co=1:9) with a special "woven bag" structure, and its preparation process is as follows:

[0060] Nickel foam (with an average pore size of 250 microns) was ultrasonically cleaned with 1 mol / L hydrochloric acid, deionized water, and ethanol for 10 minutes respectively. Then prepare 30mL of a mixed solution of 0.1mol / L nickel chloride and 2mol / L ammonium chloride as the electrolyte, the nickel sheet as the counter electrode and reference electrode, the cleaned nickel foam as the working electrode, and submerge the nickel foam into the electrolyte 1cm 2 , in two-electrode mode with -1A cm -2 The constant current program was used for 500 seconds, and the resulting nickel foam was washed with deionized water and dried in a vacuum oven. Then soak the above 4 pieces of dried nickel foam in 25mL of an aqueous solution prepared by dissolving 0.1mmol ferric nitrate nonahydrate, 0.9mmol cobalt nitrate hexa...

Embodiment 3

[0062] This example provides a multi-level iron-cobalt bimetallic phosphide (Fe:Co=3:7) with a special "woven bag" structure, and its preparation process is as follows:

[0063] Nickel foam (with an average pore size of 250 microns) was ultrasonically cleaned with 1 mol / L hydrochloric acid, deionized water, and ethanol for 10 minutes respectively. Then prepare 30mL of a mixed solution of 0.1mol / L nickel chloride and 2mol / L ammonium chloride as the electrolyte, the nickel sheet as the counter electrode and reference electrode, the cleaned nickel foam as the working electrode, and submerge the nickel foam into the electrolyte 1cm 2 , in two-electrode mode with -1A cm -2 The constant current program was used for 500 seconds, and the resulting nickel foam was washed with deionized water and dried in a vacuum oven. Then soak the above 4 pieces of dried nickel foam in 25mL of an aqueous solution prepared by dissolving 0.3mmol ferric nitrate nonahydrate, 0.7mmol cobalt nitrate hexa...

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Abstract

The invention relates to a multi-level metal phosphide as well as a preparation method and application thereof. The multi-level metal phosphide comprises metal foam framework and metal phosphide covering the surface of the metal foam framework. Through macropores with the average pore diameter of 50-500 microns are distributed among the metal foam framework, and macropores with the average pore diameter of 10-100 microns are distributed on the surface of the metal foam framework; the metal phosphide is cobalt phosphide or iron-cobalt bi-metal phosphide; the metal phosphide is of a sheet line structure similar to a woven bag. The multi-level metal phosphide provided by the invention has excellent performance of catalyzing hydrogen evolution reaction and oxygen evolution reaction at the sametime under an alkaline condition, so that the multi-level metal phosphide can be used as a bifunctional electrocatalyst and can also be used as a cathode and an anode to catalyze electrochemical water decomposition reaction; good stability is shown on hydrogen evolution reaction, oxygen evolution reaction and electrochemical water decomposition.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a multi-level metal phosphide and its preparation method and application. [0002] technical background [0003] In the past century, the massive consumption of energy has brought a lot of wealth to human beings and promoted the development of population. 80% of the energy comes from traditional fossil energy (such as coal, oil, natural gas, etc.). Wait). Therefore, finding clean, renewable and sustainable new energy to replace traditional fossil energy has become a challenge that all mankind must face together. Hydrogen energy is an important clean energy with development prospects, and it is one of the most concerned new energy among the currently developed clean energy (such as: solar energy, wind energy, tidal energy, etc.). Hydrogen energy has the advantages of abundant reserves, wide sources, high energy density, and non-polluting combustion...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J37/34B01J37/10C25B11/06C25B11/03C25B1/04
CPCB01J27/1853B01J37/348B01J37/10C25B1/04B01J35/33Y02E60/36
Inventor 张京涛张珍曾冬妮陈颖
Owner GUANGDONG UNIV OF TECH
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