Voltammetry of hydroxide ion in aqueous solutions on gold microelectrodes
Voltammetry of hydroxide ion in aqueous solutions on gold microelectrodes
A well-defined wave for the oxidation of hydroxide ions was recorded with gold microdisc electrodes either in sodium sulphate or sodium perchlorate solutions made basic with sodium hydroxide. The wave appeared at about 1.3 V versus SCE, just before the background discharge. The plot of the limiting current corresponding to this wave against the radius of a series of microdisc electrodes gave a straight line which indicated that the process is diffusion controlled. Similarly, the limiting current was found to depend linearly on pH over the range 9-12.5. To our knowledge, the results presented in this article provide the first experimental evidence for the diffusion-controlled electrochemical oxidation of hydroxide ions in aqueous solutions.
microelectrode, hydroxide oxidation
5-7
Abdelsalam, Mmdouh Elsayed
d1cbddcb-9f5c-46d5-b774-1bbaee26e115
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Baldo, M.Antonietta
86795914-65aa-410c-9e92-1266ade1c9a6
Daniele, Salvatore
cd677266-5cc2-48c2-8145-e95861a0b4d2
June 1998
Abdelsalam, Mmdouh Elsayed
d1cbddcb-9f5c-46d5-b774-1bbaee26e115
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Baldo, M.Antonietta
86795914-65aa-410c-9e92-1266ade1c9a6
Daniele, Salvatore
cd677266-5cc2-48c2-8145-e95861a0b4d2
Abdelsalam, Mmdouh Elsayed, Denuault, Guy, Baldo, M.Antonietta and Daniele, Salvatore
(1998)
Voltammetry of hydroxide ion in aqueous solutions on gold microelectrodes.
Journal of Electroanalytical Chemistry, 449 (1-2), .
(doi:10.1016/S0022-0728(98)00053-9).
Abstract
A well-defined wave for the oxidation of hydroxide ions was recorded with gold microdisc electrodes either in sodium sulphate or sodium perchlorate solutions made basic with sodium hydroxide. The wave appeared at about 1.3 V versus SCE, just before the background discharge. The plot of the limiting current corresponding to this wave against the radius of a series of microdisc electrodes gave a straight line which indicated that the process is diffusion controlled. Similarly, the limiting current was found to depend linearly on pH over the range 9-12.5. To our knowledge, the results presented in this article provide the first experimental evidence for the diffusion-controlled electrochemical oxidation of hydroxide ions in aqueous solutions.
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Published date: June 1998
Additional Information:
ZZ066
Keywords:
microelectrode, hydroxide oxidation
Identifiers
Local EPrints ID: 179247
URI: http://eprints.soton.ac.uk/id/eprint/179247
ISSN: 1572-6657
PURE UUID: 15e22846-bce2-4e6b-92d2-6cf587c7c3da
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Date deposited: 31 Mar 2011 14:05
Last modified: 15 Mar 2024 02:44
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Author:
Mmdouh Elsayed Abdelsalam
Author:
M.Antonietta Baldo
Author:
Salvatore Daniele
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