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Method of manufacturing wolfram carbine/platinum compound catalyze material for fuel batter with proton exchange film

A proton exchange membrane, fuel cell technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of metal particle loss, battery performance loss, etc. Achieve the effect of uniform distribution, simple preparation process and excellent antioxidant properties

Inactive Publication Date: 2008-01-23
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Metal particles may also be lost or aggregated as a result, and eventually lead to loss of battery performance

Method used

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  • Method of manufacturing wolfram carbine/platinum compound catalyze material for fuel batter with proton exchange film
  • Method of manufacturing wolfram carbine/platinum compound catalyze material for fuel batter with proton exchange film

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Step (1), weigh 1g Vulcan XC-72 carbon powder, put in 32% HNO 3 solution, heated to reflux for 1 hour, filtered, washed with deionized water until pH = 6, and dried at a constant temperature of 110°C;

[0022] Step (2), place the Vulcan XC-72 carbon powder processed in step (1) in a three-necked flask, add isopropanol and water, then add H 2 WO 4 The solution, the molar ratio of carbon and tungsten is 1:1, mix well in the ultrasonic wave, add hydrogen peroxide and ammonia water to adjust the pH=6, and let it stand for 5 hours;

[0023] Step (3), in N 2 Add excess NaBH dropwise under the conditions of protection and ultrasonic stirring 4 Solution, carry out reduction reaction; after the reaction is completed, carry out suction filtration, washing, and vacuum drying at 80°C for 4 hours;

[0024] Step (4) product is placed in tube furnace, under N 2 with H 2 Calcination is carried out under a mixed atmosphere, calcination at 800°C for 2 hours, and calcination at 1150...

Embodiment 2

[0029] Step (1), weigh 1g Vulcan XC-72 carbon powder, put in 32% HNO 3 solution, heated to reflux for 1 hour, filtered, washed with deionized water to pH = 6.5, and dried at a constant temperature of 110°C;

[0030] Step (2), place the Vulcan XC-72 carbon powder processed in step (1) in a three-necked flask, add isopropanol and water, then add H 2 WO 4 The solution, the molar ratio of carbon and tungsten is 1:1, fully mixed in the ultrasonic wave, adding hydrogen peroxide and ammonia water to adjust the pH = 6.5, and standing for 5 hours;

[0031] Step (3), in N 2 Add excess NaBH dropwise under the conditions of protection and ultrasonic stirring 4 Solution, carry out reduction reaction; after the reaction is completed, carry out suction filtration, washing, and vacuum drying at 80°C for 4 hours;

[0032] Step (4) product is placed in tube furnace, under N 2 with H 2 Calcination is carried out under a mixed atmosphere, calcination at 800°C for 2.5 hours, and calcination ...

Embodiment 3

[0037] Step (1), weigh 1g Vulcan XC-72 carbon powder, put in 32% HNO 3 solution, heated to reflux for 1 hour, filtered, washed with deionized water until pH = 7, and dried at a constant temperature of 110°C;

[0038] Step (2), place the Vulcan XC-72 carbon powder processed in step (1) in a three-necked flask, add isopropanol and water, then add H 2 WO 4 The solution, the molar ratio of carbon and tungsten is 1:1, mix well in ultrasonic wave, add hydrogen peroxide and ammonia water to adjust pH = 7, and let stand for 6 hours;

[0039] Step (3), in N 2 Add excess NaBH dropwise under the conditions of protection and ultrasonic stirring 4 Solution, carry out reduction reaction; after the reaction is completed, carry out suction filtration, washing, and vacuum drying at 80°C for 4 hours;

[0040] Step (4) product is placed in tube furnace, under N 2 with H 2 Carry out calcination under mixed atmosphere, calcine at 800°C for 3 hours, and calcine at 1150°C for 5 hours to obtain...

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Abstract

The invention relates to a novel compound catalyst for proton exchange film fuel battery and the preparation method, which is mainly composed of tungsten carbide and Pt and has the capability of higher oxidizing environment standing. The preparation method comprises: weigh out processed Vulcan XC-72 carbon powder in a three-openings flask, add isopropanol, water H2WO4 solution, stir fully by microwave and mix evenly; Under the protection of N2 and supersonic mixing, splash into excess NaBH4 solution to precede reduction reaction, proceed filtering, washing and drying after the reaction is ended, achieve tungsten carbide material after another procedure of reduction roasting; put the material in a beaker and make formaldehyde as reducer and H2PtC16 as Pt precursors, adopt root position reduction method to achieve tungsten carbide or Pt compound catalyst. The invention leads into the tungsten carbide material with stronger antioxidation performance in proton exchange film fuel battery, which can improve the whole oxidizing environment standing ability, and the preparation process is simple and doesn't need complicate equipment with potential in practical application.

Description

technical field [0001] The invention relates to a preparation method of a tungsten carbide / platinum composite catalytic material for a proton exchange membrane fuel cell, specifically preparing the tungsten carbide material by a reduction calcining method, supplemented by in-situ reduction of Pt, to obtain the tungsten carbide / Pt composite catalytic material. The tungsten carbide / platinum composite catalyst for the proton exchange membrane fuel cell can significantly improve the oxidative environment tolerance of the cell. It belongs to the technical field of catalysts. Background technique [0002] Most of the existing PEMFC technologies use carbon black as a carrier, and Pt particles are loaded on the surface of carbon black to obtain a supported Pt / C catalyst. The carbon carrier has a large specific surface area, which can greatly reduce the amount of precious metal Pt used and reduce the overall cost of the battery. However, the problem that it is prone to oxidation an...

Claims

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Application Information

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IPC IPC(8): B01J23/652H01M4/92
CPCY02E60/50
Inventor 朱红张生生
Owner BEIJING JIAOTONG UNIV
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