Molecular propane adsorption dynamics on platinum(111). McMaster, M. C.; Arumainayagam, C. R.; Madix, R. J. Department of Chemical Engineering, Stanford University, Stanford, CA, USA. Chem. Phys. (1993), 177(2), 461-72. CODEN: CMPHC2 ISSN: 0301-0104. Journal written in English. CAN 120:15959 AN 1994:15959 CAPLUS (Copyright 2001 ACS)

Supersonic mol. beam techniques and temp. programmed desorption (TPD) were used to study the adsorption dynamics of propane onto clean and propane-covered Pt(111). The propane sticking probability was measured directly as a function of incident translational energy, E_i, incident angle, q_i, and propane coverage, q_cov, at a surface temp. of 95 K Under these exptl. conditions, propane adsorbs molecularly onto Pt(111) terrace sites. Non-normal energy scaling is obsd. at all propane coverages indicating the importance of parallel momentum in the adsorption process. At all incident translational energies and angles studied, the sticking probability on a propane covered surface, S(q_cov), increases with increasing propane coverage. Upon satn. of the Pt(111) terrace sites, spontaneous desorption is obsd. in the direct adsorption probability expts.