Configuration and site of O{sub 2} adsorption on the Pt(111) electrode surface
- Brookhaven National Lab., Upton, NY (United States)
The inhibition of O{sub 2} reduction on a Pt(111) electrode surface with Ag adatoms has been studied to gain information on the type of O{sub 2} adsorption during the reaction. A pronounced inhibition is observed upon adsorption of Ag submonolayers, and a complete inhibition is caused by underpotential deposition of a pseudomorphic Ag monolayer and of an incommensurate hexagonal bilayer. Electrochemical and in situ surface X-ray scattering techniques were used to obtain kinetic and structural data. Statistical models for the inhibition of O{sub 2} reduction caused at submonolayers of Ag adatoms residing on top, bridge, and hollow sites of Pt(111) for O{sub 2} adsorbed on the same type of sites in three different configurations have been compared with the experimental data. Analysis of the extent of the inhibition of O{sub 2} reduction as a function of the Ag coverage shows that the data are best interpreted with O{sub 2} adsorbed at a bridge site.
- OSTI ID:
- 315966
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 45 Vol. 102; ISSN 1089-5647; ISSN JPCBFK
- Country of Publication:
- United States
- Language:
- English
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