Surfactant effects on methanol oxidation at Pt–Ru/C coated glassy carbon electrode
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Surfactant effects on methanol oxidation at Pt–Ru/C coated
glassy carbon electrode
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| Creator |
Karthikeyan, N.
Giridhar, V.V. Vasudevan , D. |
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| Subject |
Electroorganic
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| Description |
The role of surfactants, cetyl trimethyl ammonium
bromide (CTAB), sodium dodecyl sulphate (SDS) and
Triton X-100 (in the catalyst), on methanol oxidation at
commercial 50:50 Pt–Ru/C catalyst-coated glassy carbon
has been studied using cyclic voltammetry, scanning
electron microscopy (SEM) and Fourier transform infrared
spectroscopy (FT-IR). Surfactant containing catalysts
showed a considerable reduction in the methanol oxidation
potential. In terms of oxidation potential, better results
(lower methanol oxidation potential) were observed in the
order SDS>Triton X-100>CTAB>no surfactant. SEM
studies on the catalyst ink showed better homogeneity in
the sample prepared using surfactant. This indicates better
Pt Pt contact, which is likely to favour methanol adsorption
and its oxidation. Hence, lowering of oxidation potentials
for methanol oxidation could be seen with use of
surfactants. Results of FT-IR on the catalyst ink showed
definite changes in the frequencies in the case of Pt–Ru/C
containing surfactants indicating definite interaction between
catalyst and surfactant. Catalysts, with and without
surfactants, yielded linear plots of concentration vs peak
currents for methanol oxidation (0–2 M). With surfactant
containing catalysts, reduction in methanol oxidation
current was observed, and the order followed was the
reverse of the above.
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| Publisher |
Springer-Verlag
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| Date |
2010
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/484/1/2010-101.pdf
Karthikeyan, N. and Giridhar, V.V. and Vasudevan , D. (2010) Surfactant effects on methanol oxidation at Pt–Ru/C coated glassy carbon electrode. Journal of Solid State Electrochemistry, 14. pp. 877-881. ISSN 1432-8488 |
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| Relation |
http://cecri.csircentral.net/484/
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