Method for producing direct methanol fuel cell positive pole catalysts

A methanol fuel cell and catalyst technology, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low electrocatalytic activity, battery performance degradation, catalyst poisoning, etc., and achieve uniform dispersion and electroactivity The effect of increased area and mild conditions

Inactive Publication Date: 2009-07-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anode catalysts used in proton exchange membrane fuel cells and methanol fuel cells have low electrocatalytic activity, and a small amount of CO produced in reformed gas or direct methanol electrocatalytic oxidation can poison the catalyst, thereby greatly reducing the performance of the battery.

Method used

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  • Method for producing direct methanol fuel cell positive pole catalysts
  • Method for producing direct methanol fuel cell positive pole catalysts
  • Method for producing direct methanol fuel cell positive pole catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Ultrasonically disperse carbon nanotubes in an aqueous solution of ruthenium trichloride, wherein the mass ratio of carbon nanotubes: ruthenium is 1:0.02, and the ultrasonic time is 0.5 hours, with a drop rate of 9ml / h, 1ml / mg Ru The amount of 30% hydrogen peroxide was added dropwise to the system, and the mixture was refluxed at 75°C for 3.5 hours, then filtered, washed, and dried at 80°C to obtain hydrated ruthenium dioxide-supported carbon nanotubes;

[0022] (2) Disperse the hydrated ruthenium dioxide-loaded carbon nanotubes prepared in step (1) in ethylene glycol, ultrasonically disperse, and add chloroplatinic acid, wherein the mass ratio of ruthenium: platinum: ethylene glycol is 1:0.5 : 200, the pH value was adjusted to 6.5, and the mixture was refluxed at 125°C for 1.5 hours, then filtered, washed, and vacuum-dried at 65°C to obtain a high-efficiency direct methanol fuel cell anode catalyst Pt / RuO 2 ·xH 2 O / CNTs.

[0023] Prepared Pt-RuO 2 ·xH 2 The tra...

Embodiment 2

[0025] (1) Ultrasonically disperse carbon nanotubes in an aqueous solution of ruthenium trichloride, wherein the mass ratio of carbon nanotubes: ruthenium is 1:0.04, the ultrasonic time is 1 hour, and at a dropping rate of 10ml / h, 1.5ml / h mg Ru The amount of 30% hydrogen peroxide was added dropwise to the system, and the mixture was refluxed at 80°C for 4 hours, then filtered, washed, and dried at 90°C to obtain hydrated ruthenium dioxide-supported carbon nanotubes;

[0026] (2) Disperse the hydrated ruthenium dioxide-loaded carbon nanotubes prepared in step (1) in ethylene glycol, ultrasonically disperse, and add chloroplatinic acid, wherein the mass ratio of ruthenium: platinum: ethylene glycol is 1:1 : 250, adjust the pH value to 7, reflux at 130°C for 2 hours, then filter, wash, and vacuum dry at 70°C to prepare the high-efficiency direct methanol fuel cell anode catalyst Pt / RuO 2 ·xH 2 O / CNTs.

[0027] Prepared Pt-RuO 2 ·xH 2 The electroactive area test results of O / ...

Embodiment 3

[0029] (1) Ultrasonic dispersion of carbon nanotubes in an aqueous solution of ruthenium trichloride, wherein the mass ratio of carbon nanotubes: ruthenium is 1:0.1, ultrasonic time is 2 hours, with a drop rate of 15ml / h, 1.7ml / h mg Ru The amount of 30% hydrogen peroxide was added dropwise to the system, and the mixture was refluxed at 78°C for 4.2 hours, then filtered, washed, and dried at 110°C to obtain hydrated ruthenium dioxide-supported carbon nanotubes;

[0030] (2) Disperse the hydrated ruthenium dioxide-supported carbon nanotubes prepared in step (1) in ethylene glycol, ultrasonically disperse, add chloroplatinic acid, wherein the mass ratio of ruthenium: platinum: ethylene glycol is 1:1.5 : 280, adjust the pH value to 6.8, reflux at 132°C for 2.2 hours, then filter, wash, and vacuum-dry at 68°C to prepare the high-efficiency direct methanol fuel cell anode catalyst Pt / RuO 2 ·xH 2 O / CNTs.

[0031] Prepared Pt-RuO 2 ·xH 2 The test results of electrocatalytic oxida...

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Abstract

The invention discloses a making method of anode catalyst for direct carbinol fuel battery, which comprises the following steps: adding carbon nanometer pipe in the solution of ruthenium trichloride to do ultrasonic vibration; using trace quantity of sampling pump to drip hydrogen dioxide solution slowly under indoor temperature; heating; refluxing to react; filtering; washing; drying; obtaining the hydrated ruthenium trichloride loaded by carbon nanometer pipe; dispersing the hydrated ruthenium trichloride loaded by carbon nanometer pipe into ethandiol; adding platinochloric acid solution to adjust pH value; heating; refluxing; filtering; washing; drying to obtain n-RuO2.xH2O / CNTs catalyst. The invention simplifies the technique with mild operating condition and cheap cost, which has superior CO toxicity resistance.

Description

technical field [0001] The invention relates to catalyst preparation technology, in particular to a direct methanol fuel cell anode catalyst Pt-RuO 2 ·xH 2 Preparation method of O / CNTs. Background technique [0002] As a clean, efficient and stable power supply technology, fuel cells have been highly valued by countries all over the world. Among them, the research on proton exchange membrane fuel cell (PEMFC) and direct methanol fuel cell (DMFC) is more concerned. They can be used in power supplies, as power supplies for mobile phones and laptops, and have future potential for specific end-user applications. However, the anode catalysts for proton exchange membrane fuel cells and methanol fuel cells have low electrocatalytic activity, and a small amount of CO produced in reformed gas or direct methanol electrocatalytic oxidation can poison the catalyst, thereby greatly reducing the performance of the battery. Therefore, improving the electrocatalytic activity of the cata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/42H01M4/92
CPCY02E60/50
Inventor 王红娟余皓彭峰傅小波周春梅
Owner SOUTH CHINA UNIV OF TECH
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