title: Peroxide-like intermediate observed at hydrogen rich condition on Pt(111) after interaction with oxygen.
abstract: Hydrogen peroxide has been found to form as a byproduct during fuel cell operation, which is linked to the degradation of the ion exchange membrane resulting in a shorter lifetime of the fuel cell. Using O 1s X-ray photoelectron spectroscopy and X-ray absorption spectroscopy we investigated the molecular oxygen adsorption on hydrogenated Pt(111) and found that adsorbed hydrogen promotes the formation of a hydrogen peroxide-like intermediate. Polarization dependent X-ray absorption spectroscopy reveals that the O-O molecular axis is close to parallel and the OH group is perpendicular to the surface.
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd, Menlo Park, CA 94025, USA.
authors.forename: Janay B
authors.initials: JB
authors.lastname: MacNaughton
authors.forename: Lars-Ake
authors.initials: LA
authors.lastname: Näslund
authors.forename: Toyli
authors.initials: T
authors.lastname: Anniyev
authors.forename: Hirohito
authors.initials: H
authors.lastname: Ogasawara
authors.forename: Anders
authors.initials: A
authors.lastname: Nilsson