Surface femtochemistry of oxygen and coadsorbates on Pt(111)


R. J. Finlay, T. Her, C. Wu, and E. Mazur. 1997. “Surface femtochemistry of oxygen and coadsorbates on Pt(111).” In Femtochemistry and Femtobiology: Ultrafast Reaction Dynamics at Atomic-Scale Resolution, edited by Villy Sundstrm, Pp. 629–659. Imperial College Press. Publisher's Version


We review the photoprocesses of oxygen on Pt(111), both with and without coadsorbates, and recent progress in describing these processes. We present new data that address the chemical pathway to formation of CO2 in CO/O2/Pt(111) induced by subpicosecond laser pulses. The data show conclusively that the O2 desorbs molecularly. We also find that if the CO reacts by an atomic pathway then the capture of oxygen atoms by the CO is highly efficient; if it reacts by a molecular pathway then the oxygen atoms in the transition state are inequivalent.
Last updated on 07/24/2019