Istituto dei materiali per l'elettronica ed il magnetismo     
Vattuone L., Gerbi A., Rocca M., Valbusa U., Pirani F., Vecchiocattivi F., Cappelletti D. Stereodynamic Effects in the Adsorption of Ethylene onto a Metal Surface. In: Angewandte Chemie-International Edition, vol. 43 (39) pp. 5200 - 5203. Wiley, 2004.
The role of molecular alignment of nonpolar molecules in gas-surface interactions has so far escaped direct experimental investigations. We have employed a novel technique to prepare highly aligned supersonic beams and we show that ethylene molecules that impinge on silver surfaces precovered with molecular oxygen as "helicopters" have a higher sticking probability than "cartwheels" (Figure 1). The sticking probability, S, of reactant gas-phase molecules impinging on a metal surface is a key parameter for the quantitative understanding of heterogeneous catalysis at the gas-solid interface.
URL: http://onlinelibrary.wiley.com/doi/10.1002/anie.200461302/abstract
DOI: 10.1002/anie.200461302
Subject heterogeneous catalysis
molecular beams
surface chemistry

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