Effect of the Surface Roughness of Conducting Polypyrrole Thin-Film Electrodes on the Electrocatalytic Reduction of Nitrobenzene
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Effect of the Surface Roughness of Conducting
Polypyrrole Thin-Film Electrodes on the Electrocatalytic
Reduction of Nitrobenzene
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| Creator |
Adhikari, A.
Radhakrishnan, S. Vijayan, M. |
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| Subject |
Electrochemical Materials Science
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| Description |
Conducting polypyrrole (PPy) thin-film
electrodes were prepared by the electropolymerization of
pyrrole on gold-coated glass plates. Films of various
roughnesses were obtained by the variation of the scan
rates during electropolymerization. These thin films were
modified by doping with 6mM of the dopant NiCl2. The
surface morphology of the films was studied by scanning
electron microscopy and atomic force microscopy (AFM),
which suggested films prepared with a high scan rate
were rougher in nature than the films produced with a
low scan rate. The electrocatalytic reduction of nitrobenzene
was carried out with these electrodes with the cyclic
voltammetry technique in acetonitrile containing 0.1M
HClO4 as a supporting electrolyte. The various results
obtained show that the conducting PPy thin-film electrodes
were catalytically active toward the electroreduction
process. The modified PPy film electrodes doped with
NiCl2 were more active toward nitrobenzene electroreduction
than the PPy film alone. The results indicate that the
roughness of the films played a very important role in
determining their catalytic activity. The PPy films that
were more rough in nature were catalytically more active
than the smooth films; this may have been due to the
availability of more reactive sites in the case of rough
films. The apparent diffusion coefficients of the PPy film
electrodes were also calculated
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| Publisher |
Wiley Periodicals
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| Date |
2012
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3109/1/059-2012.pdf
Adhikari, A. and Radhakrishnan, S. and Vijayan, M. (2012) Effect of the Surface Roughness of Conducting Polypyrrole Thin-Film Electrodes on the Electrocatalytic Reduction of Nitrobenzene. Journal of Applied Polymer Science, 125. pp. 1875-1881. ISSN 0021-8995 |
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| Relation |
http://wileyonlinelibrary.com
http://cecri.csircentral.net/3109/ |
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