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Preparation method of integrated nickel-based porous nickel phosphide hydrogen evolution electrode

A technology of nickel phosphide and porous nickel, applied in the direction of electrode, electrode shape/type, electrolysis process, etc., can solve the problems of less active sites for hydrogen evolution and insufficient stability, and achieve good stability, simple and easy method, catalytic The effect of high hydrogen evolution activity

Active Publication Date: 2018-08-17
CHONGQING TECH & BUSINESS UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method for an integrated nickel-based porous nickel phosphide hydrogen evolution electrode, and its purpose is to solve the problem that the existing phosphide hydrogen evolution catalyst has few hydrogen evolution active sites and the stability is not good enough

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  • Preparation method of integrated nickel-based porous nickel phosphide hydrogen evolution electrode
  • Preparation method of integrated nickel-based porous nickel phosphide hydrogen evolution electrode
  • Preparation method of integrated nickel-based porous nickel phosphide hydrogen evolution electrode

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Embodiment 1

[0024] Embodiment 1: the preparation method of integrated nickel-based porous nickel phosphide hydrogen evolution electrode,

[0025] Step 1, put the nickel foam substrate into a 3mol / L dilute hydrochloric acid solution for 20 minutes and ultrasonically wash it with deionized water, then place it in ethanol for 30 minutes of ultrasonic treatment to obtain a clean nickel foam substrate;

[0026] Step 2, preparation molar concentration is the hydrofluoric acid aqueous solution of 0.01mol / L;

[0027] Step 3, adding the foamed nickel substrate prepared in step 1 to the hydrofluoric acid aqueous solution prepared in step 2; then etching and reacting at 100°C for 5 hours to form a nickel-based porous nickel precursor;

[0028] Step 4, taking out the nickel-based porous nickel precursor obtained after the treatment in step 3, washing with deionized water and drying;

[0029] Step 5, the nickel-based porous nickel precursor and sodium hypophosphite were heated at 400 °C in 4% H 2 -A...

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Abstract

The invention relates to the technical field of electrolytic hydrogen production, in particular to a preparation method of an integrated nickel-based porous nickel phosphide hydrogen evolution electrode. The preparation method of the integrated nickel-based porous nickel phosphide hydrogen evolution electrode comprises the specific steps that firstly, deionized water is prepared, specifically, a mixed solution with the mass ratio of organic alcohols being 1:(0-100) is prepared; secondly, weak acid is added into the mixed solution obtained in the first step, so that a weak acid solution with the weak acid concentration being 0.01-2 mol / L is prepared; thirdly, a foamed nickel substrate is added into the weak acid solution prepared in the second step, and then the etching reaction is conducted at the temperature of 10-100 DEG C for 1-10 hours, so that a nickel-based porous nickel precursor is obtained; fourthly, the nickel-based porous nickel precursor is taken out, washed with the deionized water and then dried; and fifthly, the nickel-based porous nickel precursor treated in the fourth step and sodium hypophosphite are placed in the hydrogen and inert gas mixed atmosphere for phosphating treatment at the temperature of 250-400 DEG C, and thus the integrated nickel-based porous nickel phosphide electrode is obtained. By adoption of the solution, the problems that an existing phosphide hydrogen evolution catalyst has few hydrogen evolution active sites and is poor in stability are solved.

Description

technical field [0001] The invention belongs to the technical field of electrolytic hydrogen production, and in particular relates to a preparation method of an integrated nickel-based porous nickel phosphide hydrogen evolution electrode. Background technique [0002] As a kind of "green energy" with abundant resources, high energy and no secondary pollution, hydrogen energy is considered to be one of the ideal energy sources to solve the energy and environmental crisis in the post-petroleum era. There are many ways to produce hydrogen, among which electrolysis of water produces hydrogen, using non-storable renewable resources (solar energy, wind energy, tidal energy, etc.) For the chemical energy to be utilized, the sustainable utilization of resources is realized. [0003] Although the hydrogen evolution reaction in water electrolysis has a history of nearly a hundred years, existing studies have shown that, except for Pt noble metals, the overpotential of the hydrogen ev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/03C25B11/04C25B11/06C23F1/28C23C22/07C25B1/04
CPCC23C22/07C23F1/28C25B1/04C25B11/031C25B11/051C25B11/057C25B11/075Y02E60/36
Inventor 熊昆晋佩文周桂林高媛邓仁浩
Owner CHONGQING TECH & BUSINESS UNIV
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