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Nickel phosphide compound with multi-level pore structure and preparation method and application thereof

A technology of nickel phosphide and composites, which is applied in the field of electrocatalytic materials, can solve the problems of high cost and scarcity of platinum-based precious metals, and achieve the effects of high repeatability, cheap and easy raw materials, and suitable for mass production

Active Publication Date: 2020-08-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects or deficiencies of scarcity and high cost of platinum-based noble metals in the prior art as hydrogen evolution electrocatalysts, and provide a nickel phosphide composite with a multi-level pore structure

Method used

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  • Nickel phosphide compound with multi-level pore structure and preparation method and application thereof
  • Nickel phosphide compound with multi-level pore structure and preparation method and application thereof
  • Nickel phosphide compound with multi-level pore structure and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a nickel phosphide composite with a multi-level hole structure. Its preparation process is as follows.

[0051] 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 30mL of an aqueous solution prepared by dissolving 1mmol nickel nitrate hexahydrate and 6mmol hexamethylenetetramine in deionized water, and transf...

Embodiment 2

[0053] 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 30mL of an aqueous solution prepared by dissolving 1mmol nickel nitrate hexahydrate and 6mmol hexamethylenetetramine in deionized water, and transfer it to the liner containing polytetrafluoroethylene Packaged in a hydrothermal kettle, hydrothermally reacted at 100°C for 10 hours, coo...

Embodiment 3

[0055] 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 30mL of an aqueous solution prepared by dissolving 1mmol nickel nitrate hexahydrate and 6mmol hexamethylenetetramine in deionized water, and transfer it to the liner containing polytetrafluoroethylene Packaged in a hydrothermal kettle, hydrothermally reacted at 120°C for 6 hours, cool...

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Abstract

The invention relates to a nickel phosphide compound with a multi-level pore structure and a preparation method and application thereof. The nickel phosphide compound comprises a metal foam frameworkand a nickel phosphide compound micron sheet covering the surface of the metal foam framework, through macropores with the average pore diameter of 50-500 microns are distributed among the metal foamframeworks, and macropores with the average pore diameter of 10-100 microns are distributed on the surfaces of the metal foam frameworks; and nano-pores are distributed in the nickel phosphide compound micron sheet. The nickel phosphide compound has a multi-level pore structure, the through macropores are beneficial to electrolyte transfer and gas diffusion, and the macropores and the nano-pores are beneficial to exposing more active sites and increasing the contact with an electrolyte so that the reaction rate is increased. The nickel phosphide compound can be used as a working electrode forelectrochemical decomposition of water to produce hydrogen, shows excellent hydrogen evolution performance under full pH, and has the advantages of low cost, excellent electro-catalytic hydrogen evolution performance and strong stability.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a nickel phosphide composite with a multi-level hole structure and a preparation method and application thereof. [0002] technical background [0003] With the progress of human society, the demand for energy is increasing day by day. At present, traditional fossil energy such as oil, coal, and natural gas is still the main source of energy on which human survival depends. Due to extensive use, these fossil energy sources are not only facing increasing depletion, but also bring serious environmental pollution, which has become a bottleneck restricting the sustainable development of human society. The development of green renewable energy that can replace traditional fossil energy has become the key to solving the dual challenges of energy and environmental issues and promoting the sustainable development of human society. [0004] Hydrogen energy ...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/03C25B11/06B01J27/185B01J35/10B01J37/10
CPCC25B1/04B01J27/1853B01J37/10C25B11/031C25B11/091B01J35/695Y02E60/36
Inventor 张京涛张珍陈颖
Owner GUANGDONG UNIV OF TECH
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