AVS 52nd International Symposium
    Surface Science Monday Sessions
       Session SS1-MoA

Paper SS1-MoA8
Water Chemistry on Cu(110): from Ultra High Vaccum to Ambient Conditions

Monday, October 31, 2005, 4:20 pm, Room 202

Session: Catalysis for the Hydrogen Economy
Presenter: K. Andersson, Stanford University / Stockholm University, Sweden
Authors: K. Andersson, Stanford University / Stockholm University, Sweden
H. Bluhm, Lawrence Berkeley National Laboratory
G. Ketteler, Lawrence Berkeley National Laboratory
H. Ogasawara, Stanford Synchrotron Radiation Laboratory
T. Schiros, Stanford Synchrotron Radiation Laboratory
D.F. Ogletree, Lawrence Berkeley National Laboratory
M. Salmeron, Lawrence Berkeley National Laboratory
A. Nilsson, Stanford Synchrotron Radiation Laboratory
Correspondent: Click to Email
Probing the coverage and chemical speciation of molecules at surfaces are of fundamental interest in the fields of heterogeneous catalysis and molecular environmental science. We present in-situ studies of water adsorption on Cu(110) at pressures up to 1 Torr in the temperature range 270 - 470 K using synchrotron-based photoelectron spectroscopy. Partial coverages of atomic O, OH, and H@sub 2@O are reported under various conditions. We compare our results to those obtained under ultra high vacuum conditions where we have found a water dissociation onset at about 160 K with an activation barrier of 0.53-0.56 eV.@footnote 1@ @FootnoteText@ @footnote 1@ K. Andersson, A. Gómez, C. Glover, D. Nordlund, H. Öström, T. Schiros, O. Takahashi, H. Ogasawara, L.G.M. Pettersson, A. Nilsson, Surf. Sci. Lett., in press (2005).