AVS 50th International Symposium
    Surface Science Thursday Sessions
       Session SS3-ThM

Paper SS3-ThM9
Measuring Defect Sites on TiO@sub 2@(110): The CO@sub 2@ Probe

Thursday, November 6, 2003, 11:00 am, Room 328

Session: Oxide Structure, Growth, and Defects
Presenter: T.L. Thompson, University of Pittsburgh
Authors: T.L. Thompson, University of Pittsburgh
O.E. Diwald, University of Pittsburgh
J.T. Yates, Jr., University of Pittsburgh
Correspondent: Click to Email
Defect sites govern the chemical and photochemical behavior of TiO@sub 2@ rutile surfaces. We have found that CO@sub 2@ binds more strongly (54.0 kJ/mol) to oxygen-vacancy Ti@super +3@ defect sites made by thermally reducing TiO@sub 2@(110) than to the fully-oxidized 5-fold coordinated Ti@super +4@ surface sites (48.5 kJ/mol). Enhanced surface reduction at temperatures up to 1000K causes an increase in the relative amount of the strongly-bound CO@sub 2@.