Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 35, Issue 12, Pages 6399-6408Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.03.061
Keywords
Direct methanol fuel cell; CO oxidation; Methanol oxidation; Nb2O5; Pt catalyst
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Funding
- Brain Korea 21 Project
- MOST/KOSEF [R11-2002-102-00000-0]
- National Research Foundation of Korea [2002-0037327] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A Pt-Nb2O5/C electrocatalyst was synthesized by a two-step process as an anode material in direct methanol fuel cell (DMFC). The Pt-Nb2O5/C catalysts heat-treated at different temperatures (400 and 500 degrees C) in flowing N-2 were characterized by various methods such as inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, transmission electron microscopy, and X-ray photoemission spectroscopy (XPS). The heattreated Pt-Nb2O5/C catalyst at 400 degrees C showed the best electrochemical activity for CO and methanol oxidations among the prepared catalysts. The XPS results showed the electronic structure change of Pt, indicating a formation of interaction between Pt and Nb2O5. It is suggested that a synergistic effect between Pt and Nb2O5 enhances the electrocatalytic activity for CO and methanol oxidations. We believe that Nb2O5-promoted Pt/C catalyst may be regarded as one of the attractive candidates as an anode material in DMFC. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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