caa a22 4500 475843894 CHVBK 20180406123908.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1009011217485 doi (NATIONALLICENCE)springer-10.1023/A:1009011217485 The flexible surface or the rigid surface? [Elektronische Daten] [Michael Bowker, Roger Bennett] In this paper we discuss aspects of the concept described by Somorjai as the "flexible surface”, and whether some surfaces can be considered to be inflexible, or rigid. We present STM results which appear to manifest both types of behaviour for surfaces, depending on their oxidation state. Copper metal surfaces can be classed as flexible, showing facile reconstruction in the presence of oxygen, whereas an oxidised Pd(110) surface shows no apparent diffusivity, even at 500 K. We go on to show data for a bulk oxide which indicates that sub-stoichiometry in the sample induces an element of flexibility in the surface, especially during reaction with oxygen. Finally, this is related to the direct observation of spillover on model catalysts of Pd nanoparticles supported on TiO2. It must be recognised that flexibility relates to surface diffusivity and hence length- and time-scales. Surfaces which appear inflexible at short times may be flexible at long times. In relation to catalysis then, surface flexibility depends on the relationship between the time-scale of diffusive events on the surface and the catalytic turnover number. Plenum Publishing Corporation, 2000 catalysis nationallicence metal surfaces nationallicence oxide surfaces nationallicence nanoparticles nationallicence spillover nationallicence SMSI nationallicence oxygen storage nationallicence STM nationallicence Bowker Michael Centre for Surface Science and Catalysis, Department of Chemistry, University of Reading, RG6 6AD, Reading, UK aut Bennett Roger Centre for Surface Science and Catalysis, Department of Chemistry, University of Reading, RG6 6AD, Reading, UK aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 85-94 1022-5528 14:1-4<85 2000 14 11244 https://doi.org/10.1023/A:1009011217485 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009011217485 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bowker Michael Centre for Surface Science and Catalysis, Department of Chemistry, University of Reading, RG6 6AD, Reading, UK aut NATIONALLICENCE 700 1- Bennett Roger Centre for Surface Science and Catalysis, Department of Chemistry, University of Reading, RG6 6AD, Reading, UK aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 85-94 1022-5528 14:1-4<85 2000 14 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer