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An Extended Method for the Practical Evaluation of the Standard Rate Constant from Cyclic Voltammetric Data
Author(s) -
Lavagnini Irma,
Antiochia Riccarda,
Magno Franco
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302851
Subject(s) - dimensionless quantity , electron transfer , constant (computer programming) , reaction rate constant , electron , analytical chemistry (journal) , transfer (computing) , chemistry , cyclic voltammetry , order (exchange) , simple (philosophy) , thermodynamics , materials science , physics , electrode , electrochemistry , computer science , kinetics , chromatography , quantum mechanics , programming language , philosophy , finance , epistemology , parallel computing , economics
The Nicholson's treatment for the evaluation of the heterogeneous standard rate constant k 0 of electron transfer from cyclic voltammetric (CV) data is combined with the Klingler and Kochi method suitable to totally irreversible systems in order to use very large Δ E p x n values, where n is the number of electrons involved in a simple electron‐transfer process O+ n e − ⇌R. An empirical relationship between the dimensionless parameter Ψ = k 0 [π DnvF/(RT )] −1/2 and Δ E p x n which practically replaces the Nicholson's working curve up to about 200 mV is reported.