Volume 96, 1993

Ultraviolet-laser-induced desorption of CO and NO from Pt surfaces

Abstract

Desorption of CO and NO molecules chemisorbed on Pt(001) and Pt(111) surfaces at 80 K induced by ultraviolet nanosecond-pulsed laser irradiation has been studied by a resonance-enhanced multiphoton ionization technique. Desorption is not thermally driven, but induced by electronic excitation. CO desorption from Pt(111) and NO desorption from both Pt surfaces are found to be single-photon processes, while CO desorption from Pt(001) is a three-photon process. The translational, rotational, and vibrational temperatures of desorbed NO from Pt(001) are independent of pump-laser wavelength in the energy range 3.5–6.4 eV. For NO from Pt(111), on the other hand, the internal-energy distribution is strongly dependent on pump-laser wavelength. On the basis of these results, the desorption mechanism induced by valence-electron excitation for molecules chemisorbed on metals has been discussed in connection with the unoccupied electronic structures of the adsorbate and the metal.

Article information

Article type
Paper

Faraday Discuss., 1993,96, 105-116

Ultraviolet-laser-induced desorption of CO and NO from Pt surfaces

K. Fukutani, M-B. Song and Y. Murata, Faraday Discuss., 1993, 96, 105 DOI: 10.1039/FD9939600105

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements