Subbiah, P. and Noel, M. and Chidambaram, S. and Udupa, K.S. (1988) Cathode material in the electrosynthesis of p-aminophenol from nitrobenzene-voltammetric approach. Bulletin of Electrochemistry , 04 (06). pp. 573-576. ISSN 0256-1654

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Voltammetric studies of nitrobenzene reduction on Cu, glassy carbon (GC) and Pb electrodes were carried out with a view to ascertaLi the choice of cathode material for p-aminophenol synthesis. Lead was found to give irreproducible responses due to some electrochemical mixed potential processes. However, on Cu and GC electrodes, the electroreduction was found to stop at the four electron stage in the first peak potential region which indeed is the condition required for phenylhydroxylamine formation. This conclusion was drawn based on voltammetric peak current calculations as well as the comparative voltammetric studies of nitrobenzene and p- nitrophenol which is known to follow a 6 electron path. Comparing the voltammetric curves on Cu and GC for nitrobenzene in alcoholic Hz SO4 medium, it is noticed that the hydrogen evolution process starts at much more positive potentials on Cu as compared to GC. Since further reduction of phenyl hydroxylamine to the aniline along with Hz evolution would also occur on Cu, it is concluded that carbon electrode would be a better choice for p-aminophenol synthesis

Item Type: Article
Uncontrolled Keywords: Linear sweep voltammetry; p-aminophenol; Nitrobenzene reduction
Subjects: Electroorganic
Depositing User: ttbdu cecri
Date Deposited: 21 Mar 2012 05:31
Last Modified: 21 Mar 2012 05:31

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