Document Detail


Migration and diffusion coupled with a fast preceding reaction. Voltammetry at a microelectrode.
MedLine Citation:
PMID:  21662939     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A mathematical model implemented by simulation is presented for voltammetry of a reversible couple that involves a fast preceding chemical reaction and mixed diffusional and migrational transport. The hydrogen couple, H(+)/H(2), fulfills the above criteria. For strong acids there is no preceding reaction, whereas for weak acids the preceding reaction is HA = H(+) + A(-). The computed voltammograms are compared with experimental voltammograms for the reduction of strong and weak acids at Pt microelectrodes with excess of and without supporting electrolyte. The key assumption in the calculations is that the flux of hydrogen ion is independent of the anion. This assumption is supported by the experimental fact that the wave heights in the absence of supporting electrolyte of several strong acids of equal concentration and with anions of various size are identical.
Authors:
A Jaworski; M Donten; Z Stojek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical chemistry     Volume:  71     ISSN:  0003-2700     ISO Abbreviation:  Anal. Chem.     Publication Date:  1999 Jan 
Date Detail:
Created Date:  2011-06-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  167-73     Citation Subset:  -    
Affiliation:
Department of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland.
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