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Promoting effect of carbon functional groups in methanol oxidation on supported Pt catalyst

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2009
Authors
Stevanović, Sanja
Panić, Vladimir
Tripković, Dušan
Jovanović, Vladislava M.
Article (Published version)
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Abstract
The contribution of carbon functional groups (CFG) to methanol oxidation at carbon-supported Pt catalysts is studied in this work. Platinum black, attached in a form of a thin layer to electrochemically treated glassy carbon (GC), is investigated as a model system. Impedance measurements reveal significant changes in capacitive response of GC anodically polarized in H2SO4 solution in comparison to unoxidized state. XPS analyses show the increased fraction of oxygen-containing CFGs upon electrochemical treatment of GC. The activity of Pt black attached to oxidized GC for methanol oxidation is more than two times larger in comparison to the catalyst attached to unoxidized GC. Increased activity is most likely due to the promotion Of COads removal by increased content of CFGs.
Keywords:
Carbon functional groups / Electrochemical activation / Platinum catalyst / Methanol oxidation / EIS
Source:
Electrochemistry Communications, 2009, 11, 1, 18-21
Publisher:
  • Elsevier Science Inc, New York
Projects:
  • Novi materijali za primenu u gorivim spregovima sa polimernom membranom (RS-142056)

DOI: 10.1016/j.elecom.2008.10.021

ISSN: 1388-2481

WoS: 000263018200005

Scopus: 2-s2.0-57949098337
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18
URI
http://cer.ihtm.bg.ac.rs/handle/123456789/489
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