Alignment and impact angular dependence to O 2 sticking and dissociation on Pt(111) and close-packed steps

Physical Chemistry Chemical Physics, vol. 24, pp. 18227–18235

Abstract

molecules. Sticking probabilities vary significantly for helicoptering and cartwheeling molecules. Our data can be understood if normal energy scaling holds for all molecular orientations relative to the surface. Vicinal surfaces are much more reactive than Pt(111) with little to no dependence on the molecule's alignment and a more complex angular dependence. At low incident energies, sticking probabilities are highest for incidence into step facets. The weak alignment dependence points toward predominant scattering into a physisorbed state preceding chemisorbed states over a wide angular range.

Authors 3

1. Maatje J. E. de Willigen Aachen

   Leiden University

   Affiliation as printed

   Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands

2. Mitsunori Kurahashi

   National Institute for Materials Science

   Affiliation as printed

   Surface Characterization Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

3. Ludo B. F. Juurlink corresponding Aachen

   Leiden University

   Affiliation as printed

   Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands