Reaction of nitrobenzene on gold single-crystal electrodes: surface crystallographic orientation dependence
The electroreduction of nitrobenzene has been studied on Au single crystals of (111), (110), (100), and (210) orientations and on Au polycrystals in dilute aqueous perchlorate solution using cyclic voltammetry. The voltammograms were found to be dependent sensitively on the surface orientation. Nota...
Saved in:
Published in | Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 477; no. 2; pp. 111 - 120 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.11.1999
Elsevier Science |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The electroreduction of nitrobenzene has been studied on Au single crystals of (111), (110), (100), and (210) orientations and on Au polycrystals in dilute aqueous perchlorate solution using cyclic voltammetry. The voltammograms were found to be dependent sensitively on the surface orientation. Notably, the reduction on (110), (210), and (poly) electrodes can lead to a stably adsorbed redox intermediate, not reported before, at about 0.33 V versus SCE and the intermediate is deduced as the phenyldihydroxylamine/phenyldihydroxylamine cation redox couple. The unusual stability of the redox intermediate is found to correlate with the orientation of adsorbed water molecules that can be controlled intimately by the applied potential in relationship to the potential of zero charge on the surfaces. |
---|---|
ISSN: | 1572-6657 1873-2569 |
DOI: | 10.1016/S0022-0728(99)00384-8 |