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The Effect of Fluoride on the Aqueous Iron–Thionine Photogalvanic System
Author(s) -
Archer M. D.,
Wilford J. H.,
Ferreira M. I. C.
Publication year - 1982
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198200027
Subject(s) - chemistry , thionine , photocurrent , fluoride , aqueous solution , inorganic chemistry , platinum , ion , electrode , electrochemistry , optics , organic chemistry , physics , catalysis
The influence of fluoride ions on the photocurrent and photostationary state composition of the acid, aqueous iron‐thionine system at bare and thionine‐coated platinum electrodes was investigated. Observed photocurrents are in some circumstances increased by the addition of fluoride, in accordance with the theory of characteristic lengths of Albery et al. However, the Gibbs energy of the forward reaction, and hence the open‐circuit voltage available from a differential photogalvanic cell, are sharply decreased.