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http://dx.doi.org/10.7464/ksct.2012.18.4.432

Synthesis and Characterization of a Series of PtRu/C Catalysts for the Electrooxidation of CO  

Lee, Seonhwa (Department of Photonics and Applied Physics, Gwangju Institute of Science and Technology)
Choi, Sung Mook (School of Materials Science and Engineering, Gwangju Institute of Science and Technology)
Kim, Won Bae (School of Materials Science and Engineering, Gwangju Institute of Science and Technology)
Publication Information
Clean Technology / v.18, no.4, 2012 , pp. 432-439 More about this Journal
Abstract
The electrocatalytic oxidation of CO was studied using carbon-supported 20 wt% PtRu (PtRu/C) catalysts, which were prepared with different Pt : Ru atomic ratios from 7 : 3 to 3 : 7 using a colloidal method combined with a freeze-drying procedure. The bimetallic PtRu/C catalysts were characterized by various physicochemical analyses, including X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). CO stripping voltammetry measurements indicated that the addition of Ru with a Pt catalyst significantly improved the electrocatalytic activity for CO electrooxidation. Among the tested catalysts, the $Pt_5Ru_5/C$ catalyst had the lowest onset potential (vs.Ag/AgCl) and the largest CO EAS. Structural modification via lattice parameter change and electronic modification in the unfilled d band states for Pt atoms may facilitate the electrooxidation of CO.
Keywords
PEMFC; PtRu catalyst; Carbon monoxide; CO tolerant;
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