caa a22 4500 47584386X CHVBK 20180406123908.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1009067302464 doi (NATIONALLICENCE)springer-10.1023/A:1009067302464 Understanding heterogeneous catalysis on an atomic scale: a combined surface science and reactivity investigation for the dehydrogenation of ethylbenzene over iron oxide catalysts [Elektronische Daten] [C. Kuhrs, Y. Arita, W. Weiss, W. Ranke, R. Schlögl] In order to study the dehydrogenation of ethylbenzene to styrene, epitaxial iron oxide model catalyst films with Fe3O4(111), α-Fe2O3(0001) and KFe x O y (111) stoichiometry were prepared in single crystal quality on Pt(111). They were investigated using surface science techniques before and after atmospheric pressure reaction experiments in a newly designed single crystal flow reactor. As expected from low-pressure measurements, Fe3O4(111) is catalytically inactive. The catalytic activity of α-Fe2O3(0001) starts after an activation period of about 45 min. After that, the surface is essentially clean but shows a high concentration of defects. On the potassium-promoted films, however, the activation period is much longer, the activity then is higher and the surface gets covered completely with carbon and oxygen during reaction. This indicates a different reaction pathway on the promoted films with a carbon-oxygen species as catalytically active species. Plenum Publishing Corporation, 2000 metal oxides nationallicence atomic scale surface chemistry nationallicence TDS nationallicence single crystal flow reactor nationallicence high pressure nationallicence pressure gap nationallicence defects nationallicence active carbon nationallicence Kuhrs C. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut Arita Y. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut Weiss W. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut Ranke W. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut Schlögl R. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 111-123 1022-5528 14:1-4<111 2000 14 11244 https://doi.org/10.1023/A:1009067302464 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009067302464 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kuhrs C. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut NATIONALLICENCE 700 1- Arita Y. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut NATIONALLICENCE 700 1- Weiss W. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut NATIONALLICENCE 700 1- Ranke W. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut NATIONALLICENCE 700 1- Schlögl R. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 111-123 1022-5528 14:1-4<111 2000 14 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer