The oxidation of trivalent chromium at Au(1 1 1) electrode |
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| Affiliation: | 1. Federal University of Rio Grande do Norte, Institute of Chemistry, Lagoa Nova CEP 59.072-970, RN, Brazil;2. Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via L. Borsari 46, I-44121 Ferrara, Italy;1. Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, T.S., India;2. Academy of Scientific and Innovative Research (AcSIR), New Delhi, India;1. Aix-Marseille Université, CNRS, BIP UMR 7281, 31 Chemin J. Aiguier, F-13402, Marseille Cedex 20, France;2. Laboratoire IUSTI (UMR AMU-CNRS 7343) Polytech Marseille, Dpt Mécanique Energétique (ME) Technopôle de Chateau Gombert 5 Rue Enrico Fermi, 13453, Marseille Cedex 13, France |
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| Abstract: | Electro-oxidation of Cr(III)–Cr(VI) species was investigated on the (1 1 1) plane of a gold single crystal in a highly alkaline solution. This process was found to be structure sensitive due to the involvement of the OH− anion in the rate-determining step. It was noticed additionally, that in the ionic system the lifting of the reconstruction could be due to the coadsorption of the anions from the supporting electrolyte and the anions supplied from the electro-oxidation process. |
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