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Foam transition-metal solid (gas) phosphated self-support hydrogen evolution electrode and preparation method thereof

A foam metal, transition metal technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the preparation process and assembly steps that hinder the large-scale production and practical application of phosphide hydrogen evolution electrodes, high toxicity and flammability, etc. problems, to achieve the effect of strong designability, variety, and adjustable components

Active Publication Date: 2015-05-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The latest research shows that metal phosphide is a very promising electrocatalytic hydrogen evolution material with a low hydrogen evolution overpotential comparable to that of Pt. However, at present, transition metal phosphide nanoparticles are first prepared by methods such as hydrothermal synthesis. Then use a binder to bond it to a support such as a titanium sheet or a carbon mesh and use it as an electrode; the transition metal source for preparing phosphide nanoparticles mostly comes from the corresponding compound salts, and the phosphating process mostly involves organic phosphorus compounds as a phosphorus source , has high toxicity and flammability, and its complicated preparation process and assembly steps have greatly hindered the large-scale production and practical application of phosphide hydrogen evolution electrodes. Therefore, it is urgent to find a raw material with abundant sources and simple preparation process. Phosphide hydrogen evolution electrode with low risk and toxicity, easy to handle and large-scale preparation and method thereof

Method used

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  • Foam transition-metal solid (gas) phosphated self-support hydrogen evolution electrode and preparation method thereof
  • Foam transition-metal solid (gas) phosphated self-support hydrogen evolution electrode and preparation method thereof
  • Foam transition-metal solid (gas) phosphated self-support hydrogen evolution electrode and preparation method thereof

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Effect test

Embodiment 1

[0029] A solid (gas) state phosphating self-supporting hydrogen evolution electrode after electrochemically depositing a metal nickel-molybdenum alloy layer on the surface of foamed copper and a preparation method thereof, according to the following steps:

[0030] a. Foam copper (100ppi, see attached figure 1 ) soaked in 20wt.% hydrochloric acid solution and ultrasonically cleaned for 5 minutes to remove the surface oxide layer to expose the fresh metal surface, and then cleaned to neutral with ultrapure water;

[0031] b. Use the copper foam treated in step a as the cathode, and put nickel sulfate (5.26 g / L), sodium molybdate (6.18 g / L), trisodium citrate (29.41 g / L), ammonium citrate (22.61 g / L) and thiourea (7.61 g / L) mixed plating solution, with carbon rod as the anode, the current density is 2mA / cm 2 , the electrodeposition time is 60min, and an electrodeposited nickel-molybdenum alloy layer is obtained on the surface of the copper foam cathode;

[0032] c. Clean the f...

Embodiment 2

[0037] A foamed copper solid (gas) state phosphating self-supporting hydrogen evolution electrode and its preparation method are carried out according to the following steps,

[0038] a. Soak foam copper (100ppi) in 20wt.% hydrochloric acid solution and ultrasonically clean it for 5 minutes to remove the surface oxide layer to expose the fresh metal surface, and then clean it with ultrapure water until neutral;

[0039] b. Suspend the copper foam processed in step a in the ceramic boat, and sprinkle the red phosphorus powder on the bottom of the ceramic boat as the phosphorus source, and the mass ratio of the phosphorus source to the metal source is 0.7;

[0040] c. Put the ceramic boat in which the copper foam sample and red phosphorus are placed in step b into the middle of the tubular atmosphere furnace cavity, feed argon as a protective atmosphere, and ventilate for 30 minutes to remove the residual air;

[0041] d. To set the phosphating process parameters, first raise th...

Embodiment 3

[0043] A self-supporting hydrogen evolution electrode after nickel foam solid (gas) state phosphating and its preparation method are carried out according to the following steps,

[0044] a. Soak nickel foam (120ppi) in 20wt.% hydrochloric acid solution and ultrasonically clean it for 5 minutes to remove the surface oxide layer to expose the fresh metal surface, and then clean it with ultrapure water until neutral;

[0045] b. Suspend the nickel foam processed in step a in the ceramic boat, and sprinkle the red phosphorus powder on the bottom of the ceramic boat as the phosphorus source, and the mass ratio of the phosphorus source to the metal source is 0.7;

[0046] c. Put the ceramic boat in which the nickel foam sample and red phosphorus are placed in the step b into the middle of the tubular atmosphere furnace cavity, feed argon as a protective atmosphere, and ventilate for 30 minutes to remove the residual air;

[0047] d. To set the phosphating process and parameters, fi...

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Abstract

The invention relates to a foam transition-metal solid (gas) phosphated self-support hydrogen evolution electrode and a preparation method thereof. By using solid red phosphorus powder as a phosphorus source, single / double-component foam metal or composite foam metal subjected to multielement surface modification performs phosphating reaction with red phosphorus or vapor thereof in an inert protective atmosphere to finally form the self-support three-dimensional porous transition-metal phosphide hydrogen evolution electrode. The hydrogen evolution electrode has the advantages of large specific area, high catalytic activity, stable chemical property and favorable adaptability, and has favorable hydrogen evolution activity in acidic, neutral and alkaline environments. The electrode preparation method has the advantages of simple technique, low cost, accessible raw materials, controllable production technique and high repeatability; and the obtained electrode has the advantages of multiple varieties and adjustable components.

Description

technical field [0001] The invention relates to a foam transition metal solid (gas) state phosphating self-supporting hydrogen evolution electrode and a preparation method thereof, belonging to the technical field of material science and technology and electrocatalytic hydrogen production. Background technique [0002] With the decrease of non-renewable fossil fuels such as coal and oil and the intensification of environmental pollution, hydrogen energy has attracted great attention due to its renewable, pollution-free, storable and other advantages. Common hydrogen production methods include electrolysis of water, photocatalysis, fossil fuels, and biological hydrogen. Photocatalytic hydrogen production and biological hydrogen production have high cost and low efficiency. Fossil fuel hydrogen production will produce greenhouse gases such as carbon dioxide, while electrolytic water hydrogen production is simple, efficient, and environmentally friendly, and the hydrogen produc...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/04C25B1/04
CPCY02E60/36
Inventor 王孝广马自在
Owner TAIYUAN UNIV OF TECH
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