Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 340963
Title Stripping chronopotentiometry at scanned deposition (SSCP). Part 3. Irreversible electrode reactions
Author(s) Leeuwen, H.P. van; Town, R.M.
Source Journal of Electroanalytical Chemistry 556 (2003). - ISSN 1572-6657 - p. 93 - 102.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) differential-pulse polarography - metal speciation analysis - fundamental features - mercury-electrodes - parameters - reduction - surface
Abstract A rigorous expression is derived for the scanned deposition potential stripping chronopotentiometry (SSCP) curve for the case of quasi-reversible and irreversible redox reactions. The equation is fully applicable to both a conventional (macro) electrode and a microelectrode. SSCP curves are shown to have a spectacular insensitivity to electrochemical irreversibility and this feature is even more pronounced at a microelectrode. These observations can be readily explained by considering the relative location of the curves on the potential axis. Modification of the experimental conditions (deposition time, electrode volume) allows the extent of resistance to irreversibility to be manipulated. These remarkable characteristics have far-reaching implications for in situ analysis, and allow the effects of irreversibility to be easily distinguished from e.g. those of chemical heterogeneity in the metal speciation.
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