Nonthermal surface chemistry: collision-induced reactions of NH3 on Pt{111}

Greg J. Szulczewski; Robert J. Levis

doi:10.1117/12.180834

21 July 1994 Nonthermal surface chemistry: collision-induced reactions of NH₃ on Pt{111}

Greg J. Szulczewski, Robert J. Levis

Proceedings Volume 2125, Laser Techniques for Surface Science; (1994) https://doi.org/10.1117/12.180834
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

We report the collision-induced desorption and dissociation of two molecular forms of ammonia bound to a Pt{111} single crystal by a beam of translationaly energetic, neutral noble gas atoms. In this experiment the probability for desorption at low coverage is measured as a function of the collision energy between an Ar atom and chemisorbed ammonia molecule and is found to be independent of the Ar beam angle of incidence. At higher initial ammonia coverages the probability of collision-induced desorption is greater since the NH₃/Pt{111} binding energy is much weaker. In addition we observe formation of surface NH_x products generated in a process known as collision-induced dissociation.

Citation Download Citation

Greg J. Szulczewski and Robert J. Levis "Nonthermal surface chemistry: collision-induced reactions of NH₃ on Pt{111}", Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); https://doi.org/10.1117/12.180834

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