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Acta Phys. Chim. Sin.  2012, Vol. 28 Issue (04): 871-876    DOI: 10.3866/PKU.WHXB201202013
ELECTROCHEMISTRY AND NEW ENERGY     
Highly Active Pd-Co3O4/MWCNTs Catalysts for Methanol Electrocatalytic Oxidation
NIE Su-Lian, ZHAO Yan-Chun, FAN Jie-Wen, TIAN Jian-Niao, NING Zhen, LI Xiao-Xiao
Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi Province, P. R. China
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Abstract  Nano-flocculent-Co3O4 modified multi-walled carbon nanotubes supported Pd nanoparticles (Pd-Co3O4/MWCNTs) with uniform dimensions were prepared by a facile hydrothermal method using Co(NO3)3·6H2O as the cobalt source, polyethylene glycol (PEG) 20000 as a surface active agent, and H2PdCl4 as the Pd precursor. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, and X-ray powder diffraction. The Pd nanoparticles had a face-centered cubic crystal structure and were well dispersed on the external walls of the Co3O4/MWCNTs. The catalytic activity was studied by cyclic voltammetry and chronoamperometry toward methanol oxidation. The Pd-Co3O4/MWCNT catalysts had a large electrochemically active area, good electrocatalytic performance, and stability toward methanol oxidation in alkaline media. All the results suggest that Co3O4 will improve the electrocatalytic activity in direct methanol fuel cells.

Key wordsDirect methanol fuel cell      Co3O4      Hydrothermal method      Pd      Multi-walled carbon nanotubes      Electrocatalytic oxidation     
Received: 19 October 2011      Published: 01 February 2012
MSC2000:  O646  
  O643  
Fund:  

The project was supported by the Guangxi Natural Science Foundation, China (2010GXNSFF013001, 0728043) and National Natural Science Foundation of China (21163002).

Corresponding Authors: ZHAO Yan-Chun     E-mail: yanchunzh@yahoo.cn
Cite this article:

NIE Su-Lian, ZHAO Yan-Chun, FAN Jie-Wen, TIAN Jian-Niao, NING Zhen, LI Xiao-Xiao. Highly Active Pd-Co3O4/MWCNTs Catalysts for Methanol Electrocatalytic Oxidation. Acta Phys. Chim. Sin., 2012, 28(04): 871-876.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201202013     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2012/V28/I04/871

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