title: Structural Reorganization of Pt(111) Electrodes by Electrochemical Oxidation and Reduction.
abstract: The surface restructuring of Pt(111) electrodes upon electrochemical oxidation/reduction in 0.1 M HClO4was studied by in situ grazing-incidence small-angle X-ray scattering and complementary scanning tunneling microscopy measurements. These methods allow quantitative determination of the formation and structural evolution of nanoscale Pt islands during potential cycles into the oxidation region. A characteristic ripening behavior is observed, where these islands become more prominent and homogeneous in size with increasing number of cycles. Their characteristic lateral dimensions primarily depend on the upper potential limit of the cycle and only slightly increase with cycle number. The structural evolution of the Pt surface morphology strongly resembles that found in studies of Pt(111) homoepitaxial growth and ion erosion in ultrahigh vacuum. It can be fully explained by a microscopic model based on the known surface dynamic behavior under vacuum conditions, indicating that the same dynamics also describe the structural evolution of Pt in the electrochemical environment.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstraße 40, 24098 Kiel, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Ruge
authors.affiliation: Experimental Division, European Synchrotron Radiation Facility , 71 Avenue des Martyrs, 38000 Grenoble, France.
authors.forename: Jakub
authors.initials: J
authors.lastname: Drnec
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstraße 40, 24098 Kiel, Germany.
authors.forename: Björn
authors.initials: B
authors.lastname: Rahn
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstraße 40, 24098 Kiel, Germany.
authors.forename: Finn
authors.initials: F
authors.lastname: Reikowski
authors.affiliation: Department of Chemistry, University of Victoria , Victoria, British Columbia V8W 2Y2, Canada.
authors.forename: David A
authors.initials: DA
authors.lastname: Harrington
authors.affiliation: Experimental Division, European Synchrotron Radiation Facility , 71 Avenue des Martyrs, 38000 Grenoble, France.
authors.forename: Francesco
authors.initials: F
authors.lastname: Carlà
authors.affiliation: Experimental Division, European Synchrotron Radiation Facility , 71 Avenue des Martyrs, 38000 Grenoble, France.
authors.forename: Roberto
authors.initials: R
authors.lastname: Felici
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstraße 40, 24098 Kiel, Germany.
authors.forename: Jochim
authors.initials: J
authors.lastname: Stettner
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstraße 40, 24098 Kiel, Germany.
authors.forename: Olaf M
authors.identifier: 0000-0003-4900-0880
authors.initials: OM
authors.lastname: Magnussen