title: From ultra-high vacuum to the electrochemical interface: x-ray scattering studies of model electrocatalysts.
abstract: In-situ surface X-ray scattering (SXS) has become a powerful probe of the atomic structure at the metal-electrolyte interface. In this paper we describe an experiment in which a Pt(111) sample is prepared under ultra-high vacuum (UHV) conditions to have a p(2 x 2) oxygen layer adsorbed on the surface. The surface is then studied using SXS under UHV conditions before successive transfer to a bulk water environment and then to the electrochemical environment (0.1 M KOH solution) under an applied electrode potential. The Pt surface structure is examined in detail using crystal truncation rod (CTR) measurements under these different conditions. Finally, some suggestions for future experiments on alloy materials, using the same methodology, are proposed and discussed in relation to previous results.
authors.affiliation: Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, UK L69 7ZE. clucas@liv.ac.uk
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Lucas
authors.forename: Michael
authors.initials: M
authors.lastname: Cormack
authors.forename: Mark E
authors.initials: ME
authors.lastname: Gallagher
authors.forename: Alexander
authors.initials: A
authors.lastname: Brownrigg
authors.forename: Paul
authors.initials: P
authors.lastname: Thompson
authors.forename: Ben
authors.initials: B
authors.lastname: Fowler
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Gründer
authors.forename: Jerome
authors.initials: J
authors.lastname: Roy
authors.forename: Vojislav
authors.initials: V
authors.lastname: Stamenković
authors.forename: Nenad M
authors.initials: NM
authors.lastname: Marković
mesh_terms: D002384:Catalysis; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D004579:Electron Transport; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties; D014618:Vacuum; D014961:X-Ray Diffraction
chemical_list: D010984:Platinum