AVS 59th Annual International Symposium and Exhibition
    Surface Science Monday Sessions
       Session SS-MoM

Paper SS-MoM11
Enhanced Chemicurrent Effect of H2 Oxidation on Porous MIM Nanostructures

Monday, October 29, 2012, 11:40 am, Room 21

Session: Nonequillibrium and Nonlinear Processes
Presenter: E. Karpov, University of Illinois at Chicago
Authors: E. Karpov, University of Illinois at Chicago
M. Hashemian, University of Illinois at Chicago
S. Dasari, University of Illinois at Chicago
Correspondent: Click to Email
Understanding of the basic charge transfer processes at solid interfaces with reactive gas mixtures is a pathway toward advanced sensing, novel catalyst and energy conversion applications. In particular, currents induced in surface reactions on catalytic nanofilms forming Schottky or MOS type contact with a semiconductor substrate have received considerable attention during the last decade. Physical nature of these currents is intriguing, since the Schottky nanofilm device contains no explicit ion conductive layer, and it resembles a photovoltaic cell much closer than an electrochemical device. In this presentation we report on observation stationary chemicurrents in the 0.1 mA/cm^2 range induced by molecular hydrogen oxidation on surface of porous Pt/TiO2/Ti nanostructures with a potential barrier at room temperature conditions. Possible physical and chemical mechanisms of the current production are discussed.