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Method for preparing copper-silver alloy hydrogen evolution catalyst through friction stir processing

A copper-silver alloy and friction stir technology, which is applied in metal processing equipment, non-precious metal oxide coatings, manufacturing tools, etc., can solve the problems of low hydrogen evolution overpotential, improve hydrogen evolution performance, save the coating process, and facilitate The effect of control

Active Publication Date: 2022-04-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problem that the existing preparation process fails to obtain a stable and efficient copper-silver alloy catalyst, copper-silver alloy self-supporting materials are prepared by friction stir processing of copper plates, copper sheets and silver sheets, and a low hydrogen evolution overpotential is obtained by taking advantage of insoluble alloys Catalyst, its excellent performance does not decay for a long time

Method used

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  • Method for preparing copper-silver alloy hydrogen evolution catalyst through friction stir processing
  • Method for preparing copper-silver alloy hydrogen evolution catalyst through friction stir processing
  • Method for preparing copper-silver alloy hydrogen evolution catalyst through friction stir processing

Examples

Experimental program
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Effect test

example 1

[0043] (1) Take bulk metal copper plates, copper flakes and silver flakes as raw materials; clean the surface of the raw materials;

[0044] (2) Fix the metal copper plate and silver sheet on the workbench of the friction stir welding machine with a clamp, and sandwich a piece of silver (length 20mm × width 1mm × height 5mm) between the two copper plates;

[0045] (3) Use a stirring head with a shoulder; at the beginning of processing, the stirring head is aligned with the copper and silver sheet, adjust the stirring head to press down until the stirring needle is completely submerged in the processed metal, the distance between the shoulder and the surface of the copper plate is less than 2mm, and the processing parameters are set as 1800rpm--100mm / min, let the stirring head automatically rotate along one end of the copper-silver sheet and advance to the other end to mix once;

[0046] (4) Sampling: The stirring head still starts processing from the starting position of the l...

example 2

[0049] (1) Take bulk metal copper plates, copper flakes and silver flakes as raw materials; clean the surface of the raw materials;

[0050] (2) Fix the metal copper plate and silver sheet on the workbench of the friction stir welding machine with a clamp, and sandwich a piece of silver (length 20mm × width 1mm × height 5mm) between the two copper plates;

[0051] (3) Use a stirring head with a shoulder; at the beginning of processing, the stirring head is aligned with the copper and silver sheet, adjust the stirring head to press down until the stirring needle is completely submerged in the processed metal, the distance between the shoulder and the surface of the copper plate is less than 2mm, and the processing parameters are set as 1200rpm--30mm / min, let the stirring head automatically rotate along one end of the copper and silver sheet to the other end to mix once;

[0052] (4) Sampling: The stirring head still starts processing from the starting position of the last proce...

example 3

[0055] (1) Take bulk metal copper plates, copper flakes and silver flakes as raw materials; clean the surface of the raw materials;

[0056] (2) Fix the metal copper plate and silver sheet on the workbench of the friction stir welding machine with a clamp, and sandwich a piece of silver (length 20mm × width 1mm × height 5mm) between the two copper plates;

[0057] (3) Use a stirring head with a shoulder; at the beginning of processing, the stirring head is aligned with the copper and silver sheet, adjust the stirring head to press down until the stirring needle is completely submerged in the processed metal, the distance between the shoulder and the surface of the copper plate is less than 2mm, and the processing parameters are set as 1200rpm--200mm / min, let the stirring head automatically rotate along one end of the copper and silver sheet to the other end for mixing once;

[0058] (4) Sampling: The stirring head still starts processing from the starting position of the last ...

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Abstract

The invention relates to a method for preparing a copper-silver alloy hydrogen evolution catalyst through friction stir processing. A blocky metal copper plate, a copper sheet and a silver sheet are used as raw materials; the metal copper plates and the copper-silver sheets arranged in a staggered mode are fixed to a workbench of a friction stir welding machine through a clamp, the silver sheets and the copper sheets are clamped between the two copper plates in a staggered mode, and the overlapping width of the copper-silver sheets is smaller than the diameter of a stirring head; a stirring head with a shaft shoulder is used; when machining begins, the stirring head is aligned with the copper-silver sheet, the stirring head is adjusted to be pressed downwards until the stirring needle is completely immersed into machining metal, and the stirring head automatically rotates and advances to the other end along one end of the copper-silver sheet for mixing once; the surface copper-silver boundary disappears; a metal strip extruded by a cut stirring head is directly used as a catalyst. The problem that an existing non-solid-solution metal alloying method is not suitable for block materials is solved. Friction stir processing is applied to the field of electro-catalysis for the first time, the process is simple and convenient to operate, toxic reaction raw materials are not used, and the method is an environment-friendly green synthesis process.

Description

technical field [0001] The invention relates to the field of welding technology and the field of electrocatalysis, in particular to the friction stir processing technology and the hydrogen evolution performance of self-supporting materials. Background technique [0002] Insoluble metal alloying can adjust the electronic state of the metal as a whole, and insoluble alloys have very good application prospects in the field of electrocatalysis. Copper is used to catalyze the hydrogen evolution reaction due to its excellent electrical conductivity and abundant reserves. This reaction mainly includes two processes of adsorption and desorption. If the adsorption is strong, the desorption process is difficult to occur, and all available surface sites are available. Occupied, it is difficult to continue the reaction; and when it is easy to desorb, the adsorption is too weak, so it is necessary to find the balance point of adsorption and desorption. On the surface of an ideal catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/24C25B1/04C25B11/046
CPCY02E60/36
Inventor 杜希文胡心卓
Owner TIANJIN UNIV
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