Fuel-cell catalyst Pt/WO3 and application thereof

A fuel cell and catalyst technology, applied in physical/chemical process catalysts, battery electrodes, metal/metal oxide/metal hydroxide catalysts, etc., to achieve high oxidation resistance, high electrochemical stability, and economical and reasonable effects

Inactive Publication Date: 2013-04-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no research reports on this kind of materials,

Method used

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  • Fuel-cell catalyst Pt/WO3 and application thereof
  • Fuel-cell catalyst Pt/WO3 and application thereof
  • Fuel-cell catalyst Pt/WO3 and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of Catalyst Pt / WO by Continuous Microwave Method 3 , the specific implementation method is:

[0046] Preparation of Mesoporous Metal Oxide WO Using SBA-15 as Template 3 , the specific implementation method is: 2g SBA-15 is fully dispersed in 40mL ethanol solution, 6g metal precursor silicotungstic acid is added, the solvent is evaporated after fully stirring, the obtained powder material is moved into a tube furnace, and roasted in air at 600°C for 4h , programmed heating rate 2°C min -1 . After cooling, use 15% HF to remove the silica template, centrifuge, wash with deionized water for 4 to 6 times, and dry at 40°C for 12 hours to obtain the nano-cluster structure of the mesoporous metal oxide WO 3 . Weigh 50mg mesoporous WO 3 Fully dispersed in 20mL ethanol solution, ultrasonic for 1h, stirred for 2h.

[0047] 1.7ml of chloroplatinic acid / ethylene glycol solution (3.7mg ml -1 ) and 30ml of ethylene glycol were stirred and mixed evenly, and 2M sodium...

Embodiment 2

[0049] Experiment with the same method as in Example 1, the difference from Example 1 is that ethylene glycol is used as a solvent to disperse mesoporous WO 3 Carrier, synthetic Pt / WO 3 catalyst. The presence of Pt can be detected from the EDX image (such as image 3 ).

Embodiment 3

[0051] Catalyst Pt / WO Prepared by Gap Microwave Method 3 , the specific implementation method is:

[0052] Weigh 50 mg of the mesoporous WO prepared in Example 1 3 , fully dispersed in 20mL ethanol solution. 1.7ml of chloroplatinic acid / ethylene glycol solution (3.7mg ml -1 ) and 30ml of ethylene glycol were stirred evenly, and sodium hydroxide / ethylene glycol solution was added dropwise to pH=10, and it was placed in a microwave oven for microwave heating, that is, heating for 10s, stopping for 10s, repeating 6 times, and cooling down to room temperature to obtain Pt / glycol solution. The above reduced Pt / ethylene glycol solution was poured dropwise onto the mesoporous WO 3 On the carrier, nitric acid solution was added dropwise to make the pH = 2, and after stirring for 36 hours, it was allowed to stand still. After centrifuging, washing and drying the obtained suspension, the final product Pt / WO 3 . The prepared catalyst has good electrochemical activity and electro...

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Abstract

The invention relates to a preparation method of a fuel-cell catalyst Pt/WO3. According to the preparation method of the fuel-cell catalyst Pt/WO3, a Pt/WO3 electro-catalyst is obtained through taking mesoporous WO3, which is prepared by taking a mesoporous silicon-oxide molecular sieve as a template, as a carrier, and pouring the reduced Pt/glycol liquid onto a WO3 carrier material. The preparation method has the advantages that the preparation conditions are mild, the operation is easy, Pt can be carried on a non-carbon carrier, and the application range of the preparation method is expanded. The Pt/WO3 has excellent electrochemical activity and stability when the Pt/WO3 serves as an anode catalyst of a proton exchange membrane fuel cell.

Description

technical field [0001] The invention relates to a fuel cell catalyst Pt / WO 3 The preparation method, specifically a non-carbon mesoporous material WO 3 As a carrier, Pt was successfully supported on a non-carbon carrier by casting method. Compared with the currently used electrocatalysts, the catalyst of the invention has high electrochemical activity and electrochemical stability, and can be widely used in the field of fuel cells. Background technique [0002] With the continuous development of industry and technology, the importance of clean energy has become increasingly prominent. This is not only a challenge to energy technology, but also a huge impetus to energy science. As a new type of energy device, proton exchange membrane fuel cell (PEMFC) has many advantages such as low working temperature, no pollution, high specific power, fast start-up, etc., and has become a research hotspot around the world. [0003] At present, most fuel cell catalysts are mainly Pt / C ca...

Claims

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Application Information

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IPC IPC(8): H01M4/92B01J23/652
CPCY02E60/50
Inventor 侯明窦美玲李光福邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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