Journal
CARBON
Volume 66, Issue -, Pages 691-698Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.09.067
Keywords
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Funding
- Basic Science Research Program [NRF-20090081018, NRF-2011-0006268]
- Priority Research Center Program [NRF-2011-0006268]
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We report a novel, nanostructured Pt-graphene (Pt-G) hybrid, which is composed of Pt nanowires (NWs) grown directly on intrinsic graphene by using a mesoporous silica thin film as a nanotemplate. The direct junction between the Pt NWs and graphene, as well as the defect-free nature of the graphene grown via chemical vapor deposition, enables the charge transfer from graphene to Pt in Pt-G. The Raman, ultraviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) data on Pt-G show clear evidence for the charge transfer from graphene to Pt. Through the interaction, the Fermi level of Pt is raised by 0.3 eV. With the electronic structure altered, Pt-G shows an increased tolerance to CO-poisoning and, hence, enhanced methanol oxidation reaction (MOR) performance with increased I-f/I-b ratio and cycle stability. The present data demonstrate a novel way to exploit the unusual characteristics of graphene for useful applications. (C) 2013 Elsevier Ltd. All rights reserved.
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