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Effect of SnO2 Deposition Sequence in SnO2-Modified PtRu/C Catalyst Preparation on Catalytic Activity for Methanol Electro-Oxidation

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Title: Effect of SnO2 Deposition Sequence in SnO2-Modified PtRu/C Catalyst Preparation on Catalytic Activity for Methanol Electro-Oxidation
Authors: Wang, Guoxiong Browse this author
Takeguchi, Tatsuya Browse this author
Zhang, Yi Browse this author
Muhamad, Ernee Noryana Browse this author
Sadakane, Masahiro Browse this author
Ye, Shen Browse this author →KAKEN DB
Ueda, Wataru Browse this author
Issue Date: 2009
Publisher: Electrochemical Society
Journal Title: Journal of The Electrochemical Society
Volume: 156
Issue: 7
Start Page: B862
End Page: B869
Publisher DOI: 10.1149/1.3133249
Abstract: SnO2-modified PtRu/C catalysts were prepared in a polyol process to investigate the effect of a SnO2 deposition sequence on the catalytic activity for methanol electro-oxidation. The structure, morphology, and chemical state of the prepared catalysts were characterized by X-ray diffraction, scanning transmission electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical activities were evaluated by cyclic voltammetry, linear sweep voltammetry, and chronoamperometry measurements in combination with in situ IR reflection-absorption spectroscopy (IRRAS). Compared with those in the PtRu/C catalyst, a simultaneous deposition of PtRu and SnO2 particles or a deposition of SnO2 prior to PtRu improved the metal dispersion and decreased the alloyed Ru fraction. The deposition sequence of SnO2 did not alter the chemical-state distribution of Pt and Ru but resulted in a different surface atomic ratio of Pt, Ru, and SnO2. Electrochemical and in situ IRRAS measurements indicated that the SnO2-modified PtRu/C catalyst prepared by the deposition of PtRu prior to SnO2 gave the best catalytic activity for COads and methanol electro-oxidation among the PtRu/C and SnO2-modified PtRu/C catalysts. The roles of SnO2 deposited with different sequences in the SnO2-modified PtRu/C catalysts were proposed.
Rights: © The Electrochemical Society, Inc. 2009. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc., Volume 156, Issue 7, pp. B862-B869 (2009).
Type: article
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 叶 深

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