Kinetics of surface modification induced by submonolayer electrochemical oxygen adsorption on Pt(1 1 1)
Artikel i vetenskaplig tidskrift, 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 site.

Pt(1 1 1) electrodes Surface modification kinetics Electrochemical oxygen adsorption Electrocatalysis Place-exchange disordering

Författare

Alexander Björling

Elisabet Ahlberg

Göteborgs universitet

Juan M. Feliu

Electrochemistry Communications

1388-2481 (ISSN)

Vol. 12 359-361

Ämneskategorier

Kemi

DOI

10.1016/j.elecom.2009.12.034