NDLI: Surfactant effects on methanol oxidation at Pt–Ru/C coated glassy carbon electrode

Content Provider	Springer Nature Link
Author	Karthikeyan, N. Giridhar, V. V. Vasudevan, D.
Copyright Year	2009
Abstract	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.
Starting Page	877
Ending Page	881
Page Count	5
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	14
Issue Number	5
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-06-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electro oxidation Methanol Surfactant modified Pt–Ru/C catalyst SEM Electrical Engineering Condensed Matter Physics Characterization and Evaluation of Materials Industrial Chemistry/Chemical Engineering Analytical Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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