Oxygen reduction at the surface of glassy carbon electrodes modified with anthraquinone derivatives and dyes
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Oxygen reduction at the surface of glassy carbon electrodes modified with anthraquinone derivatives and dyes
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| Creator |
Manisankar, P.
Gomathi, A. Velayutham, D. |
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| Subject |
Electroorganic
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| Description |
The preparation, electrochemical and catalytic
behaviour of glassy carbon electrodes modified by anthra-
9,10-quinone, its amino derivatives and dyes were
investigated. The stability of the modified electrodes was
studied by cyclic voltammetry in acidic and neutral
media. The electrocatalytic ability of the modified electrodes
for the reduction of dioxygen to hydrogen peroxide
was examined by cyclic voltammetry, chronoamperometry
and chronocoulometry techniques. The influence of
pH on the electrochemical and catalytic behaviour was
studied and pH 5.0–8.0 was chosen as the optimum
working pH by comparing the shift in oxygen reduction
potential. The anthraquinone-adsorbed glassy carbon
electrodes possess excellent electrocatalytic abilities for
dioxygen reduction with overpotential ranging from 280
to 560 mV lower than that at a plain glassy carbon electrode.
Hydrodynamic voltammetric studies were performed
to determine the heterogeneous rate constants for
the reduction of O2 at the surface of the modified electrodes,
mass specific activity of the anthraquinones used
and the apparent diffusion coefficient of O2 in buffered
aqueous O2-saturated solutions. Studies showed the
involvement of two electrons in dioxygen reduction.
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| Publisher |
Springer-Verlag
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/126/1/066-2005.pdf
Manisankar, P. and Gomathi, A. and Velayutham, D. (2005) Oxygen reduction at the surface of glassy carbon electrodes modified with anthraquinone derivatives and dyes. Journal of Solid State Electrochemistry, 9 (9). pp. 601-608. |
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| Relation |
http://cecri.csircentral.net/126/
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