caa a22 4500 475843924 CHVBK 20180406123908.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1009046730688 doi (NATIONALLICENCE)springer-10.1023/A:1009046730688 Adsorption and reaction of CO on vanadium oxide-Pd(111) "inverse” model catalysts: an HREELS study [Elektronische Daten] [M. Sock, S. Surnev, M.G. Ramsey, F.P. Netzer] The room temperature adsorption and reaction of CO on Pd(111) surfaces decorated with submonolayer coverages of vanadium oxide - so-called "inverse” model catalysts - have been studied by high-resolution electron energy loss spectroscopy (HREELS) and X-ray photoelectron spectroscopy (XPS). The HREELS surface phonon spectra of the V oxide phases have been measured and used to monitor the changes in the oxide as a result of the interaction with CO. The intramolecular C-O stretching frequency of CO adsorbed on the V-oxide/Pd(111) surfaces displays two vibrational loss components as a function of CO coverage as it has been observed on the clean Pd(111) surface. The relative intensities of the two vibrational features as a function of V oxide coverage however suggest that the balance of CO adsorption sites is modified as compared to clean Pd(111) by the presence of the V oxide-Pd phase boundary. Preferential population of high coordination adsorption sites by CO in the vicinity of the oxide-metal interface is proposed. The analysis of the V oxide phonon spectra indicates that adsorbed CO partially reduces the V oxide at the boundaries of the oxide islands to the Pd metal. The reduction of V oxide by CO is dependent on the oxygen content of the V oxide phase. The reduction of V oxide is confirmed by the XPS V 2p core level shifts. Plenum Publishing Corporation, 2000 CO adsorption nationallicence CO reaction nationallicence vanadium oxide-Pd(111) catalyst nationallicence catalyst surface nationallicence HREELS nationallicence XPS nationallicence Sock M. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut Surnev S. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut Ramsey M.G. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut Netzer F.P. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 15-23 1022-5528 14:1-4<15 2000 14 11244 https://doi.org/10.1023/A:1009046730688 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009046730688 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sock M. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut NATIONALLICENCE 700 1- Surnev S. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut NATIONALLICENCE 700 1- Ramsey M.G. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut NATIONALLICENCE 700 1- Netzer F.P. Institut für Experimentalphysik, Karl-Franzens-Universität Graz, A-8010, Graz, Austria aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 14/1-4(2000-12-01), 15-23 1022-5528 14:1-4<15 2000 14 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer