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Square‐wave Voltammetry and Electrochemical Faradaic Spectroscopy of a Reversible Electrode Reaction: Determination of the Concentration Fraction of the Redox Couple
Author(s) -
Stojanov Leon,
Jovanovski Vasko,
Mirceski Valentin
Publication year - 2021
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.202060585
Subject(s) - redox , analytical chemistry (journal) , electrochemistry , voltammetry , chemistry , electrode , cyclic voltammetry , spectroscopy , faraday efficiency , square wave , inorganic chemistry , voltage , chromatography , physics , quantum mechanics
A comparative study conducted with square‐wave voltammetry (SWV) and electrochemical faradaic spectroscopy (EFS) is presented for a reversible electrode reaction of dissolved redox couple in the presence of both Ox and Red components. In agreement with previous studies, the net peak current Δ Ψ p of the theoretical SW voltammograms is positioned at the formal potential E 0′ and does not depend on the concentration ratio c (Ox)/ c (Red). However the forward‐to‐backward peak current ratio is sensitive to the redox state. For very low SW amplitudes, theoretical data imply superior features of EFS over SWV. Theoretical and experimental calibration lines are in good agreement within the interval 0.2≤ x (Ox)≤0.8.