caa a22 4500 463215095 CHVBK 20180405153154.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3916-x doi (NATIONALLICENCE)springer-10.1007/s00339-007-3916-x From adsorption at the surface to incorporation into subsurface sites: the role of steps for O/Ag [Elektronische Daten] [L. Savio, L. Vattuone, M. Rocca] Many reactions like the ethylene epoxidation which work readily in industrial reactors can not be reproduced under controlled laboratory conditions. This failure is ascribed to so-called "pressure” and "structure” gaps. The latter is possibly determined by an active role of defects, since surface science experiments are performed on nearly perfect surfaces, quite unlike those of active catalytic powders. One of the mostly investigated, but so far unresolved systems, is O/Ag which shows a unique selectivity for the partial oxidation of ethylene. Subsurface oxygen was claimed to play a pivotal role in activating oxygen adatoms, but the mechanism of O incorporation remained mysterious. The study of O2 adsorption at stepped surfaces and by supersonic molecular beams allowed for considerable progresses, showing that open steps favour dissociation and constitute a gateway through which subsurface sites can be accessed. Springer-Verlag, 2007 Savio L. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut Vattuone L. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut Rocca M. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut Applied Physics A Springer-Verlag 87/3(2007-06-01), 399-404 0947-8396 87:3<399 2007 87 339 https://doi.org/10.1007/s00339-007-3916-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3916-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Savio L. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut NATIONALLICENCE 700 1- Vattuone L. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut NATIONALLICENCE 700 1- Rocca M. Dipartimento di Fisica dell'Università di Genova, IMEM-CNR and CNISM, Via Dodecaneso 33, 16146, Genova, Italy aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/3(2007-06-01), 399-404 0947-8396 87:3<399 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer