期刊
ELECTROCHIMICA ACTA
卷 85, 期 -, 页码 84-89出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.08.086
关键词
Graphene; Pt nanoclusters; Direct methanol fuel cell; Electrooxidation
资金
- National Natural Science Foundation of China [51102085, 50972041]
- Program for New Century Excellent Talents in University, Ministry of Education of China [NCET-09-0135]
- Natural Science Foundation of Hubei Province [2011CDB057]
- Science Foundation from Hubei Provincial Department of Education [Q20111002]
- Wuhan Municipal Academic Leaders Program [200951830550]
The graphene supported platinum nanoclusters was synthesized by an efficient and clean method, in which graphene oxide and Pt ion precursor were reduced by ascorbic acid within one-step process. The obtained Pt nanoclusters attached graphene composite (PtNCs/graphene) was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS), which can directly show that Pt nanoclusters successfully formed on graphene and well distributed on the edges and wrinkles of graphene sheets. The further electrochemical characterizations including cyclic voltammograms (CV), current-time methods indicated that PtNCs/graphene has significantly higher electrocatalytic activity and stability for methanol electrooxidation compared to the normal Vulcan XC-72 and graphite supported Pt nanoclusters, which will lead a further application as a new electrode material in direct methanol fuel cell (DMFC). (C) 2012 Elsevier Ltd. All rights reserved.
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