THE PHOTODESORPTION OF NO FROM A PtSURFACE

S. Harris and S. Holloway
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S. Harris: Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK
S. Holloway: Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK

Surface Review and Letters (SRL), 1994, vol. 01, issue 04, 615-620

Abstract: Time-dependent quantum wave packets have been used in a model calculation to investigate the photodesorption of an NO molecule from a Pt surface. A hot electron, generated in the substrate by an absorbed photon, may temporarily resonate in an unoccupied NO molecular orbital. If the electron spends enough time in the resonance, then on returning to the electronic ground state, the excited NO can acquire sufficient energy to desorb. The new aspect presented here is to treat the motion of the NO and that of the electron on an equal footing when calculating the photodesorption yield. We have not employed the Born-Oppenheimer approximation, but rather studied the dynamics on potential energy surfaces including both the NO-Pt and electron-Pt interactions.

Date: 1994
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DOI: 10.1142/S0218625X94000795

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