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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2009,Vol.25>> Issue(04)>> 767-772     doi: 10.3866/PKU.WHXB200904011         中文摘要
Promoting Methanol Electro-Oxidation through Fabricating Pore Structure in Pt/CNTs Catalyst Layer by Dissolving Away Premixed La2O3 Particles
WANG Jian-She, GUO Xun, SONG Cheng-Ying, WANG Liu-Cheng, ZHAO Jian-Hong, QIU Xin-Ping
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450000, P. R. China; Key Laboratory of Organic Optoelectronics and Molecular Engineering, Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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To gain insight into the effect of increasing porosity on methanol electro-oxidation, La2O3 particles prepared throughmolten salt method were introduced into a Pt/carbon nanotubes (CNTs) catalyst layer and then dissolved in HClO4, which increased the porosity in the Pt/CNTs catalyst layer. The existence of the as-formed pore structures was confirmed by scanning electronic microscopy (SEM). Cyclic voltammetry (CV) and chronoamperometry methods were used to investigate the effect of increasing porosity, which showed that the methanol electro-oxidizing current was enhanced by 57%. The reason for this result is ascribed to improved methanol access to the Pt surface in the porous catalyst layer. The results indicate that the fabrication of pores in catalyst layer by dissolving away premixed La2O3 particles is an effective method to promote catalyst layer performance.

Keywords: Methanol electro-oxidation   Catalyst layer   Pore-forming agent   La2O3 particles   Direct methanol fuel cell  
Received: 2008-11-20 Accepted: 2008-12-05 Publication Date (Web): 2008-12-23
Corresponding Authors: WANG Jian-She, QIU Xin-Ping Email: wangjs07@zzu.edu.cn;qiuxp@tsinghua.edu.cn


Cite this article: WANG Jian-She, GUO Xun, SONG Cheng-Ying, WANG Liu-Cheng, ZHAO Jian-Hong, QIU Xin-Ping. Promoting Methanol Electro-Oxidation through Fabricating Pore Structure in Pt/CNTs Catalyst Layer by Dissolving Away Premixed La2O3 Particles[J]. Acta Phys. -Chim. Sin., 2009,25 (04): 767-772.    doi: 10.3866/PKU.WHXB200904011
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