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Amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode and preparation method thereof

A technology of alloy thin film and methanol oxidation, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of easy poisoning, poor stability and durability of electrocatalysts, achieve good catalytic activity, best stability and durability, and improve The effect of stability and durability

Active Publication Date: 2022-02-15
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a Pt-supported methanol oxidation composite electrode and its preparation method on an amorphous CrCoNi alloy film, so as to solve the problem of easy poisoning, poor stability and durability of electrocatalysts in existing direct methanol fuel cells. The problem

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  • Amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode and preparation method thereof
  • Amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode and preparation method thereof
  • Amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode and preparation method thereof

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Embodiment 1

[0044] A method for preparing an amorphous CrCoNi alloy thin film loaded Pt methanol oxidation composite electrode, comprising the following steps:

[0045] (1) Base material preparation

[0046]Grind and polish a glassy carbon sheet with a size of 1 × 1cm on a polishing machine until it is clean and smooth to remove impurities on the glassy carbon sheet, and then manually polish the glassy carbon sheet with alumina polishing powder with an average particle size of 0.02 μm on a polishing cloth. Grinding and polishing until clean and smooth, then rinse the alumina polishing powder and other impurities on the surface of the glassy carbon sheet with deionized water, and then ultrasonically wash the glassy carbon sheet in acetone, ethanol, and deionized water for 7 minutes respectively to clean the surface of the glassy carbon sheet impurities such as organic matter and polishing materials, and then use a nitrogen gun to dry the deionized water stains on the surface of the glassy ...

Embodiment 2

[0054] A method for preparing an amorphous CrCoNi alloy thin film loaded Pt methanol oxidation composite electrode, comprising the following steps:

[0055] (1) Base material preparation

[0056] Grind and polish a glassy carbon sheet with a size of 1 × 1cm on a polishing machine until it is clean and smooth to remove impurities on the glassy carbon sheet, and then manually polish the glassy carbon sheet on a polishing cloth with alumina polishing powder with an average particle size of 0.01 μm Grinding and polishing until clean and smooth, then rinse the alumina polishing powder and other impurities on the surface of the glassy carbon sheet with deionized water, and then ultrasonically wash the glassy carbon sheet in acetone, ethanol, and deionized water for 5 minutes respectively to clean the surface of the glassy carbon sheet impurities such as organic matter and polishing materials, and then use a nitrogen gun to dry the deionized water stains on the surface of the glassy ...

Embodiment 3

[0064] A method for preparing an amorphous CrCoNi alloy thin film loaded Pt methanol oxidation composite electrode, comprising the following steps:

[0065] (1) Base material preparation

[0066] Grind and polish a glassy carbon sheet with a size of 1 × 1cm on a polishing machine until it is clean and smooth to remove impurities on the glassy carbon sheet, and then manually polish the glassy carbon sheet with alumina polishing powder with an average particle size of 0.03 μm on a polishing cloth. Grinding and polishing until clean and smooth, then rinse the alumina polishing powder and other impurities on the surface of the glassy carbon sheet with deionized water, and then ultrasonically wash the glassy carbon sheet in acetone, ethanol, and deionized water for 5-10 minutes respectively to clean the glassy carbon sheet Impurities such as organic matter and polishing materials on the surface of the sheet, and then use a nitrogen gun to dry the deionized water stains on the surfa...

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Abstract

The invention discloses an amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode and a preparation method thereof, and the preparation method comprises the following steps: carrying out mechanical polishing, washing and drying on a glassy carbon sheet to prepare a pretreated glassy carbon sheet, i.e., a substrate; respectively fixing a CrCoNi alloy target material and a Pt target material on a target holder of a pulse laser deposition instrument, fixing the target holder on a target disc of a vacuum deposition chamber, placing a substrate holder in the vacuum deposition chamber, and adjusting the distance between the target material and the substrate; vacuumizing the vacuum deposition chamber, then carrying out pre-sputtering, and then depositing CrCoNi alloy; subjecting the Pt target material to the position of the original CrCoNi alloy target material, carrying out pre-sputtering, and then depositing Pt; and after deposition is finished, adjusting the pressure of the vacuum deposition chamber to atmospheric pressure, taking the substrate out, and preparing the amorphous CrCoNi alloy film loaded Pt methanol oxidation composite electrode. The film catalyst of the composite electrode has better catalytic activity and better stability and durability.

Description

technical field [0001] The invention relates to the technical field of composite electrodes, in particular to a Pt-supported methanol oxidation composite electrode on an amorphous CrCoNi alloy film and a preparation method thereof. Background technique [0002] Fuel cell is a chemical device that directly converts chemical energy into electrical energy. Its high power generation efficiency, high specific energy and low pollution have made it known as the fourth generation power generation technology. Among them, direct methanol fuel cell (DMFC) has attracted the attention of many researchers because of its wide source of fuel (methanol), low price, high energy density, and convenient storage and transportation. However, the catalyst cost of direct methanol fuel cell is too high. High, catalyst poisoning and catalyst deactivation in the catalytic process still require the unremitting efforts of researchers. [0003] At present, Pt and Pt-based catalysts are considered to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/28C23C14/18C23C14/02C23C14/50H01M4/92
CPCC23C14/28C23C14/18C23C14/021C23C14/028C23C14/505H01M4/921Y02E60/50
Inventor 吴小强杨茂安旭光孔清泉姚卫棠张靖冯威王小炼李雪吴佳芮
Owner CHENGDU UNIV
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