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Method for rapidly preparing efficient porous silver electrocatalyst

An electrocatalyst, porous silver technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of expensive, complicated preparation process, high time cost, etc.

Pending Publication Date: 2021-09-21
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the preparation methods of nanomaterials that have appeared today are relatively expensive, time-consuming and complicated, such as electrochemical methods, photoreduction methods, sol-gel methods, chemical plating methods, laser ablation methods, and powder sintering methods. , vacuum evaporation, etc.

Method used

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  • Method for rapidly preparing efficient porous silver electrocatalyst
  • Method for rapidly preparing efficient porous silver electrocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) Protected by inert gas, 99.99wt.% high-purity copper and 99.97wt.% pure silver ingots are prepared into a binary alloy with a thickness of about 50-100μm and a width of about 1cm according to the designed atomic percentage by metal melt spinning technology thin ribbon.

[0027] b) Use a high-temperature box-type resistance furnace to modify the surface of the alloy strip to make the composition of the alloy strip evenly distributed and prepare for the preparation of an ultra-uniform porous structure;

[0028] c) The temperature of the high-temperature oxidation modification process is 650°C, and a suitable oxidation is selected for 1 min;

[0029] d) Place the alloy thin strip modified by high temperature oxidation in an acidic corrosion solution assisted by a strong oxidant, adjust the concentration and corrosion time of the acidic corrosion solution, and quickly prepare a connected three-dimensional bicontinuous high-efficiency porous silver electrode by chemical d...

Embodiment 2

[0036] a) Protected by inert gas, 99.99wt.% high-purity copper and 99.97wt.% pure silver ingots are prepared into a binary alloy with a thickness of about 50-100μm and a width of about 1cm according to the designed atomic percentage by metal melt spinning technology thin ribbon.

[0037] b) Use a high-temperature box-type resistance furnace to modify the surface of the alloy strip to make the composition of the alloy strip evenly distributed and prepare for the preparation of an ultra-uniform porous structure;

[0038] c) The temperature of the high-temperature oxidation modification process is 650°C, and a suitable oxidation is selected for 1 min;

[0039] d) Place the alloy thin strips modified by high temperature oxidation in an acidic corrosion solution assisted by a strong oxidant, adjust the concentration and corrosion time of the acidic corrosion solution, and quickly prepare a connected three-dimensional bicontinuous high-efficiency porous silver electrode by chemical ...

Embodiment 3

[0046]a) Protected by inert gas, 99.99wt.% high-purity copper and 99.97wt.% pure silver ingots are prepared into a binary alloy with a thickness of about 50-100μm and a width of about 1cm according to the designed atomic percentage by metal melt spinning technology thin ribbon.

[0047] b) Use a high-temperature box-type resistance furnace to modify the surface of the alloy strip to make the composition of the alloy strip evenly distributed and prepare for the preparation of an ultra-uniform porous structure;

[0048] c) The temperature of the high-temperature oxidation modification process is 650°C, and a suitable oxidation is selected for 1 min;

[0049] d) Place the alloy thin strip modified by high temperature oxidation in an acidic corrosion solution assisted by a strong oxidant, adjust the concentration and corrosion time of the acidic corrosion solution, and quickly prepare a connected three-dimensional bicontinuous high-efficiency porous silver electrode by chemical de...

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Abstract

The invention relates to a preparation method of a super-uniform nanoscale efficient porous silver electrocatalyst. Ultrahigh-purity metal Ag and metal copper Cu are adopted as raw materials to prepare binary alloy, the alloy atomic ratio is designed, and the Ag15Cu85 alloy thin strip is prepared through the metal melt spinning technology. A two-stage preparation method is adopted, the alloy thin strip is subjected to surface modification treatment through high-temperature oxidation, and then an HCl solution assisted by H2O2 is adopted as a solution dealloying medium to prepare the super-uniform nanoscale porous silver structure. Due to the existence of the high-temperature oxidation process and the H2O2 auxiliary solution, the corrosion process of active components in the alloy thin strip is greatly accelerated, the dealloying time is shortened, meanwhile, more catalytic active sites are provided for the prepared porous structure in the high-temperature oxidation process, and the catalytic efficiency of porous silver in the water electrolysis hydrogen production process is greatly improved.

Description

technical field [0001] The invention relates to a method for rapidly preparing a high-efficiency porous silver electrocatalyst, and is a novel functional nanometer material. This type of material has a special interface and a high specific surface area, and has a wide range of applications in catalysis, sensing, and fuel cells. It also shows great potential in energy storage, electrocatalysis, and other fields. As a new type of clean energy, hydrogen has a simple preparation process and will become a strong competitor to replace fossil energy in the future. [0002] At present, hydrogen is mainly produced by electrolysis of water. The addition of hydrogen evolution electrocatalyst can greatly accelerate the adsorption and desorption process of H atoms and improve the efficiency of hydrogen production. The process of energy preparation shines. Background technique [0003] Nanoporous metallic materials are a class of materials with connected nanoscale three-dimensional bico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/042C25B11/031C25B1/04C22C9/00C22C1/02B22D11/06C23F17/00C22F1/08C23F1/44C23F1/18
CPCC25B11/04C25B1/04C22C9/00C22C1/02B22D11/0602C23F17/00C22F1/08C23F1/44C23F1/18Y02E60/36
Inventor 王旭赵子君张智超刘馨忆于文峰王馨缘荆思文
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY