Adsorption of Hydroxide and Sulfide Ions on Single‐Crystal n ‐ CdSe Electrodes

1 November 1984

journal article
Published by The Electrochemical Society in Journal of the Electrochemical Society

Vol. 131 (11) , 2614-2618
https://doi.org/10.1149/1.2115369

Abstract

Flatband potentials were determined for (112̅0) electrodes as a function of OH⁻ and SH⁻ concentrations. Surface coverage was calculated from the observed flatband potential shift. The Frumkin isotherm was applied to the data, and thermodynamic parameters were determined. The standard free energies of adsorption for OH⁻ and S⁼ were found to be −2.3 and −6.9 kcal/mol, respectively. At high SH⁻ concentrations, there was evidence for a decrease in the repulsive interactions of the S⁼ and OH⁻ ions.

Keywords

FUNCTION
THERMODYNAMIC PARAMETERS
SURFACE COVERAGE
FLATBAND POTENTIAL
SULFIDE IONS
POTENTIAL SHIFT
CDSE ELECTRODES
HIGH SH
OBSERVED FLATBAND

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