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Acta Physico-Chimica Sinica  2010, Vol. 26 Issue (05): 1207-1213    DOI: 10.3866/PKU.WHXB20100522
ELECTROCHEMISTRY     
Rare Earth Eu Doped PtRu/C Catalysts and Their Properties for Methanol Electrooxidation
AN Xiao-Sha, CHEN De-Jun, ZHOU Zhi-You, WANG Qiang, FAN You-Jun, SUN Shi-Gang
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 Zhuang Autonomous Region, P. R. China; State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
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Abstract  

Commercially available PtRu/C catalyst was doped with Eu by chemical reduction and sintering, resulting in PtRuEux/C catalysts with different Eu contents. The catalysts were characterized by transmission electron microscopy (TEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Results showed that Eu doping did not change the average size of the PtRu/C catalysts (ca 3 nm), and their surfaces were modified by both Eu metal and oxide. Cyclic voltammetry and chronoamperometry demonstrated that the activity of the PtRuEux/C catalysts was higher than that of commercial PtRu/C for methanol electrooxidation. Among the PtRuEux/C catalysts, PtRuEu0.3/C exhibited the best performance. The electrocatalytic oxidation of methanol on the catalyst was further investigated by in situ Fourier transforminfrared (FTIR) spectroscopy at molecular level. Results indicated that the adsorbed species derived from the dissociative adsorption of methanol on the catalysts were linear-bonded CO (COL). Eu doping decreased the oxidation potential of COL and thus significantly enhanced the activity of the catalysts and their tolerance to CO.



Key wordsDirect methanol fuel cell      Methanol electrooxidation      Anode catalyst      Rare earth doping      in situ FTIR spectroscopy     
Received: 28 September 2009      Published: 01 April 2010
MSC2000:  O643  
  O646  
Corresponding Authors: FAN You-Jun, SUN Shi-Gang     E-mail: youjunfan@mailbox.gxnu.edu.cn; sgsun@xmu.edu.cn
Cite this article:

AN Xiao-Sha, CHEN De-Jun, ZHOU Zhi-You, WANG Qiang, FAN You-Jun, SUN Shi-Gang. Rare Earth Eu Doped PtRu/C Catalysts and Their Properties for Methanol Electrooxidation. Acta Physico-Chimica Sinica, 2010, 26(05): 1207-1213.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20100522     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2010/V26/I05/1207

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