Phosphorictungstenic Acid-Pt/C Cathodic Catalyst in Direct Methanol Fuel Cell

Phosphorictungstenic Acid-Pt/C Cathodic Catalyst in Direct Methanol Fuel Cell

Yanzhuo Lv Tianhong Lu Changpeng Liu Wei Xing

Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of Chinese Academy of Sciences, Changchun 130022, P. R. China

College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, P. R. China

Corresponding Author Email: 
xingwei@ ciac.jl.cn
Page: 
251-256
|
Received: 
15 October 2004
|
Accepted: 
17 November 2005
|
Published: 
31 October 2005
| Citation
Abstract: 

It was reported that the carbon supported Pt and phosphorictungstenic acid (PWA) (Pt-PWA/C) catalysts were prepared with mixing the carbon supported Pt (Pt/C) catalyst and PWA solution. It was found that because PWA covered on the Pt surface possesses the oxygen affinity and the ability for inhibiting the permeation of methanol the Pt-PWA/C catalyst can increase the electrocatalytic activity for the oxygen reduction reaction (ORR) and inhibit the electrooxidation of methanol comparing with the Pt/C catalyst. When the weight ratio of PWA and Pt/C in the PWA-Pt/C catalyst is 1, the composite catalyst showed the best performance. Comparing with the Pt/C catalyst, the reduction current of oxygen is increased by about 38% and the oxidation current of methanol is decreased by about 76% at the Pt-PWA/C electrode with the best weight ratio. Therefore, the Pt-PWA/C with the suitable weight ratio can be used as a cathodic catalyst in the direct methanol fuel cell (DMFC).

Keywords: 

oxygen reduction reaction, phosphorictungstenic acid, Pt, direct methanol fuel cell

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
Acknowledgements

The authors are grateful for the financial sponsors of “ 863” Project of Science and Technology Ministry of China (2003AA517060), the National Natural Science foundation of China (20373068, 20433060, 20573057), Fund of Department of Science and Technology of Jiangsu Province (BG200302), Fund of Education Department of Jiangsu Province (JH02-080, 05KJB150061) and National “211” Key project. 

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