Rotating disc studies of some quinhydrone electrode processes
Rotating disc studies of some quinhydrone electrode processes
Anodic and cathodic stationary current/overpotential data have been obtained for the p-benzoquinhydrone, monochloro p-benzoquinhydrone and monamethyl p-behzoquinhydrone electrode processes on a platinum rotating disc electrode. Aqueous trichloracetic acid/sodium trichloracetate solutions were used as supporting electrolytes and the electrode received no pre-treatment prior to a current/overpotential experiment. The data have been used to establish the reaction mechanism. Diffusion coefficients of the quinones and the hydro-quinones have been determined using an electrochemical modification of the Stoke's diffusion cell. In addition, the mechanism of the p -benzoquinhydrone process has been established using a platinum rotating disc electrode which was cleaned with electrochemically-generated hydrogen immediately prior to a polarisation experiment. Citric acid/disodium hydrogen phosphate solutions were used as supporting electrolytes. The published stationary current/overpotential results of other workers have been re-analysed, where possible, using the equations of the present study. A considerable amount of agreement has been shown to exist between the results, contrary in some instances to the conclusions reached by the workers themselves.
University of Southampton
1980
Plunkett, Brian Arthur
(1980)
Rotating disc studies of some quinhydrone electrode processes.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Anodic and cathodic stationary current/overpotential data have been obtained for the p-benzoquinhydrone, monochloro p-benzoquinhydrone and monamethyl p-behzoquinhydrone electrode processes on a platinum rotating disc electrode. Aqueous trichloracetic acid/sodium trichloracetate solutions were used as supporting electrolytes and the electrode received no pre-treatment prior to a current/overpotential experiment. The data have been used to establish the reaction mechanism. Diffusion coefficients of the quinones and the hydro-quinones have been determined using an electrochemical modification of the Stoke's diffusion cell. In addition, the mechanism of the p -benzoquinhydrone process has been established using a platinum rotating disc electrode which was cleaned with electrochemically-generated hydrogen immediately prior to a polarisation experiment. Citric acid/disodium hydrogen phosphate solutions were used as supporting electrolytes. The published stationary current/overpotential results of other workers have been re-analysed, where possible, using the equations of the present study. A considerable amount of agreement has been shown to exist between the results, contrary in some instances to the conclusions reached by the workers themselves.
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Published date: 1980
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Local EPrints ID: 462722
URI: http://eprints.soton.ac.uk/id/eprint/462722
PURE UUID: fc9de7c0-5cce-4a11-83c2-566ffb3915f3
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Date deposited: 04 Jul 2022 19:45
Last modified: 04 Jul 2022 19:45
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Author:
Brian Arthur Plunkett
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