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Underpotential Deposition and Stripping of Lead at Disorganized Monolayer‐Modified Gold Electrodes
Author(s) -
Herzog Grégoire,
Arrigan Damien W. M.
Publication year - 2005
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.200503318
Subject(s) - underpotential deposition , monolayer , chemistry , cyclic voltammetry , stripping (fiber) , electrode , inorganic chemistry , electrochemistry , voltammetry , deposition (geology) , quartz crystal microbalance , anodic stripping voltammetry , analytical chemistry (journal) , materials science , adsorption , organic chemistry , biochemistry , paleontology , composite material , sediment , biology
Underpotential deposition (UPD) and stripping of Pb 2+ at thiol‐based disorganized monolayer‐modified gold electrodes was studied by cyclic voltammetry (CV) and electrochemical quartz crystal microgravimetry (EQCM). Electrodes modified with mercaptoacetic acid or mercaptoethane sulfonic acid were studied. Due to the proximity of the potentials for the Pb UPD and thiol reductive desorption, achievement of a UPD‐stripping voltammetry methodology for determination of low concentrations of Pb 2+ was not successful. However by comparison of the CV and EQCM data and consideration of the possible mass changes per mole electrons transferred in light of the other species present in solution, possible mechanisms are put forward for the deposition and stripping of Pb 2+ at thiol‐modified electrodes.