Kinetics of surface modification induced by submonolayer electrochemical oxygen adsorption on Pt(1 1 1)
Journal article, 2010
Electrochemical oxygen adsorption/desorption below monolayer level leads to a disordering of platinum
single-crystal surfaces vicinal to the (1 1 1) plane. The kinetics can be described by means of a consecutive
reaction from (1 1 1)-terrace sites to (1 1 0)-defect sites, in which (1 0 0)-defects act as intermediates.
The first oxidation of the electrode reflects independent contributions from terrace and step sites, the latter
being structure sensitive. Oxygen adsorption charges amount to a mean value of one electron per step
Pt(1 1 1) electrodes Surface modification kinetics Electrochemical oxygen adsorption Electrocatalysis Place-exchange disordering