Tunneling Effect of O<sub>2</sub> in Dissociative Adsorption on Pt(111) Surface

Access this Article

Author(s)

    • Diño Wilson Agerico
    • Department of Applied Physics, Osaka University, Japan|Center for Atomic and Molecular Technologies, Osaka University, Japan
    • Kasai Hideaki
    • Department of Applied Physics, Osaka University, Japan|Center for Atomic and Molecular Technologies, Osaka University, Japan

Abstract

Dissociative adsorption processes of O<sub>2</sub> molecule on Pt(111) surface are explored using quantum dynamical calculations based on coupled-channel method. The explored adsorption sites are the direct dissociative adsorption channels, where the precursor state for O<sub>2</sub> sticking are absent, with certain amount of activation barrier. We find that the dissociative sticking probability of O<sub>2</sub> depicts the sigmoidal (<i>S</i>-shaped) curve in all cases which is a manifestation of the tunneling effect. Moreover, the sticking curve is sensitively dependent on the shape of the activation barrier which affects the width of the transition region. Molecular vibration facilitates sticking and affects the width of the barrier. [DOI: 10.1380/ejssnt.2013.72]

Journal

  • e-Journal of Surface Science and Nanotechnology

    e-Journal of Surface Science and Nanotechnology 11(0), 72-75, 2013

    The Surface Science Society of Japan

Codes

Page Top