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Direct methanol fuel cell anode catalyst Pt/ MnO2-RuO2/ CNTs and preparation method thereof

A methanol fuel cell, mno2-ruo2 technology, used in catalyst activation/preparation, battery electrodes, chemical instruments and methods, etc., can solve the problem of not involving MnO2 components, etc., to improve anti-poisoning ability, simple operation, and catalytic performance. boosted effect

Inactive Publication Date: 2011-02-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The RuO prepared in this patent 2 / CNTs are beneficial to the loading of Pt and improve the anti-poisoning ability of the catalyst, however, in RuO 2 During the loading process, it is necessary to add an oxidant to carry out the oxidation reaction, and it does not involve MnO 2 components

Method used

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  • Direct methanol fuel cell anode catalyst Pt/ MnO2-RuO2/ CNTs and preparation method thereof
  • Direct methanol fuel cell anode catalyst Pt/ MnO2-RuO2/ CNTs and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Ultrasonically disperse carbon nanotubes and ruthenium trichloride in water for 1 hour (ultrasonic power 100W), in which the ratio of carbon nanotubes to water is 1mg: 0.1mL; then use a drop rate of 5ml / h , 0.02M potassium permanganate solution was added dropwise to the system, wherein the mass ratio of carbon nanotubes: ruthenium trichloride: potassium permanganate was 1:0.1:0.1, and the mixture was refluxed at 60°C for 4 hours , then filtered, washed, and dried at 90°C to obtain a composite of manganese dioxide and ruthenium dioxide supported by carbon nanotubes, that is, MnO 2 -RuO 2 / CNTs;

[0027] (2) MnO prepared in step (1) 2 -RuO 2 / CNTs added to ethylene glycol, where MnO 2 -RuO 2 / CNTs: The ratio of ethylene glycol is 1mg: 0.3mL, stir for 10min, add chloroplatinic acid under stirring condition, in which MnO 2 -RuO 2 / CNTs: The mass ratio of chloroplatinic acid is 1:0.02, adjust the pH value to neutral with KOH solution, reflux at 120°C for 2 hours, ...

Embodiment 2

[0029] (1) Ultrasonically disperse carbon nanotubes and ruthenium trichloride in water for 1 hour (ultrasonic power 150W), in which the ratio of carbon nanotubes to water is 1mg: 0.1mL; then use a drop rate of 5ml / h , 0.02M potassium permanganate solution was added dropwise to the system, wherein the mass ratio of carbon nanotubes: ruthenium trichloride: potassium permanganate was 1:0.1:0.1, and the mixture was refluxed at 80°C for 6 hours , and then filtered, washed, and dried at 100 ° C to obtain a carbon nanotube-supported manganese dioxide and ruthenium dioxide composite, that is, MnO 2 -RuO 2 / CNTs;

[0030] (2) MnO prepared in step (1) 2 -RuO 2 / CNTs added to ethylene glycol, where MnO 2 -RuO 2 / CNTs: The ratio of ethylene glycol is 1mg: 0.5mL, stir for 15min, add chloroplatinic acid under stirring condition, in which MnO 2 -RuO 2 / CNTs: The mass ratio of chloroplatinic acid is 1:0.45, adjust the pH value to neutral with KOH solution, reflux at 150°C for 3 hours, ...

Embodiment 3

[0032] (1) Ultrasonically disperse carbon nanotubes and ruthenium trichloride in water for 1 hour (ultrasonic power 200W), in which the ratio of carbon nanotubes to water is 1mg: 0.1mL; then use a drop rate of 5ml / h , 0.02M potassium permanganate solution was added dropwise to the system, wherein the mass ratio of carbon nanotubes: ruthenium trichloride: potassium permanganate was 1:0.15:0.2, and the mixture was refluxed at 70°C for 5 hours , then filtered, washed, and dried at 90°C to obtain a composite of manganese dioxide and ruthenium dioxide supported by carbon nanotubes, that is, MnO 2 -RuO 2 / CNTs;

[0033] (2) MnO prepared in step (1) 2 -RuO 2 / CNTs added to ethylene glycol, where MnO 2 -RuO 2 / CNTs: The ratio of ethylene glycol is 1mg: 0.3mL, stir for 10min, add chloroplatinic acid under stirring condition, in which MnO 2 -RuO 2 / CNTs: The mass ratio of chloroplatinic acid is 1:0.06, the pH value is adjusted to neutral with KOH solution, refluxed at 130°C for 2...

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Abstract

The invention provides a direct methanol fuel cell anode catalyst Pt / MnO2-RuO2 / CNTs and a preparation method thereof. The preparation method comprises the following steps of: adding carbon nano tube and ruthenium trichloride into water, performing ultrasonic dispersion, slowly adding potassium permanganate solution into the solution at room temperature with intense stirring, performing heating reflux on the solution, and performing filtration, washing and drying after the reaction to obtain MnO2-RuO2 / CNTs; and dispersing the prepared MnO2-RuO2 / CNTs into ethylene glycol, adding chloroplatinic acid solution into the solution, adjusting the pH value of the solution, performing heating reflux to react the solution, and filtering, washing and drying the reaction product to obtain the Pt / MnO2-RuO2 / CNTs catalyst. The method has the advantages of simple process, mild operation conditions, low cost and easy expanded production; and the catalyst prepared by the method has high electro-catalysis and oxidation activity of methanol and excellent CO poisoning resistance.

Description

technical field [0001] The invention relates to the preparation technology of direct methanol fuel cell anode catalyst, in particular to a direct methanol fuel cell anode catalyst Pt / MnO 2 -RuO 2 / CNTs and its preparation method. Background technique [0002] As a clean, high-efficiency and stable power technology, fuel cell has been highly valued by countries all over the world, and the research on direct methanol fuel cell (DMFC) is more concerned. DMFC is a kind of proton exchange membrane fuel cell. It uses solid polymer membrane as electrolyte and directly uses methanol (liquid or gaseous) as fuel. It has abundant fuel sources, convenient storage, no intermediate reforming or conversion device, and light weight. , small size, high energy density, low environmental pollution, safe operation, simple and other advantages; they can be used in power supplies, as power supplies for mobile phones and laptop computers, and have the potential to be used by designated end users...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J37/00H01M4/90H01M4/88
CPCY02E60/50
Inventor 王红娟彭峰周春梅余皓杨剑
Owner SOUTH CHINA UNIV OF TECH
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