期刊
ELECTROCHIMICA ACTA
卷 55, 期 8, 页码 2911-2917出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.01.017
关键词
Polyindoles; Composite catalyst; Platinum nanoparticles; Electrocatalytic oxidation; Formic acid
资金
- Ministry of Education, China [NSFC20933007, 50963002, 2007-207058]
- Natural Science Foundation of Jiangxi province [2007GZH1091]
- Jiangxi Provincial Department of Education [GJJ08369]
- Foundation of Jiangsu Province Education Committee [08KJD150020]
- Soochow University
Four novel composite catalysts have been developed by the electrodeposition of Pt onto glassy carbon electrode (GCE) modified with polyindoles: polyindole, poly(5-methoxyindole), poly(5-nitroindole) and poly(5-cyanoindole). As-formed composite catalysts are characterized by SEM. XRD and electrochemical analysis. Compared with Pt nanoparticles, respectively, deposited on the bare GCE and on the GCE modified with polypyrrole, the four newly developed composite catalysts exhibit higher catalytic activity towards formic acid electrooxidation by improving selectivity of the reaction via dehydrogenation pathway and thus mostly suppressing the generation of poisonous COads species. The enhanced performance is proposed to come from the synergetic effect between Pt and polyindoles and the increase of electrochemical active surface area (EASA) of Pt on polyindoles. (C) 2010 Elsevier Ltd. All rights reserved.
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