AVS 64th International Symposium & Exhibition
    Surface Science Division Thursday Sessions
       Session SS+EM+HC+MI-ThM

Invited Paper SS+EM+HC+MI-ThM3
Growth and Chemistry of rutile IrO2 Surfaces

Thursday, November 2, 2017, 8:40 am, Room 25

Session: Oxides: Structures and Reactions
Presenter: Jason Weaver, University of Florida, Gainesville
Authors: J.F. Weaver, University of Florida, Gainesville
Z. Liang, University of Florida, Gainesville
T. Li, University of Florida, Gainesville
R. Rai, University of Florida, Gainesville
M. Kim, The Ohio State University
A. Asthagiri, The Ohio State University
Correspondent: Click to Email
Interest in the surface chemistry of late transition-metal oxides has been stimulated by observations that the formation of metal oxide layers tends to dramatically alter the catalytic performance of transition metals in applications of oxidation catalysis. In this talk, I will discuss our recent investigations of the growth and chemical properties of rutile IrO2 surfaces. I will discuss our studies of the oxidation of metallic Ir surfaces by O-atom beams as well as O2 at pressures above 1 Torr. We find that stoichiometrically-terminated IrO2(110) layers could only be formed by oxidizing Ir(111) and Ir(100) at sufficiently high temperature and O2 pressure. I will discuss the binding characteristics of small molecules, and our recent discovery of highly facile CH4 activation on the IrO2(110) surface at temperatures as low as 150 K.