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Acta Phys. -Chim. Sin.  2007, Vol. 23 Issue (07): 993-996    DOI: 10.3866/PKU.WHXB20070706
Article     
Methanol Oxidation on Pd-based Electrocatalysts
ZHENG Hai-Tao; LI Yong-Liang; LIANG Jian-Ying; SHEN Pei-Kang
Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China; State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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Abstract  

Pd nanoparticles were supported on different types of carbon materials including multiwalled carbon nanotubes (MWCNT) and carbon black prepared by the intermittent microwave heating (IMH) technique. The morphologies and electrochemical properties of the electrocatalysts were characterized. TEMand XRD measurements revealed that the Pd nanoparticles were uniformly dispersed on MWCNT with an average particle size of 4 nm. The cyclic voltammetric, chronopotentiometric, and electrochemical impedance spectroscopic (EIS) experiments indicated that Pd/MWCNT electrocatalyst showed a better performance for methanol oxidation than that of Pt/C in alkaline media. A negative shift over 100 mV of the onset potential for methanol oxidation was found on Pd/MWCNT compared to that on Pt/C. The results indicated that the enhancement in the activity for methanol oxidation on Pd/MWCNT was due to not only the increase in the active surface area but also the synergistic interaction between Pd and MWCNT.

Key words： Methanol oxidation      Carbon nanotube      Pd/MWCNT      Electrocatalyst      Fuel cell     
Received: 31 January 2007      Published: 27 April 2007
MSC2000:  O643  
  TM911.4  
Corresponding Authors: SHEN Pei-Kang     E-mail: stsspk@mail.sysu.edu.cn
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Cite this article:

ZHENG Hai-Tao; LI Yong-Liang; LIANG Jian-Ying; SHEN Pei-Kang. Methanol Oxidation on Pd-based Electrocatalysts. Acta Phys. -Chim. Sin., 2007, 23(07): 993-996.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20070706     OR     http://www.whxb.pku.edu.cn/Y2007/V23/I07/993

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