caa a22 4500 467888817 CHVBK 20180406152742.0 cr unu---uuuuu 170328e20060401xx s 000 0 eng 10.1007/s11144-006-0030-6 doi (NATIONALLICENCE)springer-10.1007/s11144-006-0030-6 Surface and structural properties of pt/ceo2catalyst under preferential co oxidation in hydrogen (PROX) [Elektronische Daten] [Detre Teschner, Attila Wootsch, Olga Pozdnyakova, Hermann Sauer, Axel Knop-Gericke, Robert Schlögl] Summary: Preferential oxidation of CO in the presence of excess hydrogen was studied on Pt/CeO2with 5% metal loading. Catalytic data were similar to those observed on 1% Pt/CeO2earlier [16]. The optimum temperature region is T£373 K; conversion and selectivity of CO oxidation strongly decreased at higher temperatures. High-pressure XPS indicated CO adsorbed on platinum particles and significant amount of water on the ceria surface. The top-most ceria surface re-oxidized as small amount of oxygen (3%) was introduced into the H2/CO feed. Despite this surface re-oxidation, high-resolution TEM after reaction indicated oxygen deficient ceria bulk structure, in which the defects formed a super-cell, with CeO1.695structure. The defective ceria is suggested to play an important role stabilizing the hydrogen bonded surface water, which (i) suppresses further hydrogen oxidation and (ii) reacts at the metal/support interface with linearly adsorbed CO in a low temperature water-gas-shift type reaction to produce CO2.</o:p> Springer-Verlag/Akadémiai Kiadó, 2006 platinum nationallicence ceria nationallicence HRTEM nationallicence Hydrogen purification nationallicence preferential CO oxidation nationallicence PROX nationallicence Pt/CeO2 nationallicence high pressure XPS nationallicence Teschner Detre Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Institute of Isotopes, CRC, HAS,, Faradayweg 4-6, 14195 Berlin, Germany Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut Wootsch Attila Institute of Isotopes, CRC, HAS,, Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut Pozdnyakova Olga Institute of Isotopes, CRC, HAS,, Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut Sauer Hermann Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut Knop-Gericke Axel Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut Schlögl Robert Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 87/2(2006-04-01), 235-247 0133-1736 87:2<235 2006 87 11144 https://doi.org/10.1007/s11144-006-0030-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-006-0030-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Teschner Detre Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Institute of Isotopes, CRC, HAS,, Faradayweg 4-6, 14195 Berlin, Germany Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut NATIONALLICENCE 700 1- Wootsch Attila Institute of Isotopes, CRC, HAS,, Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut NATIONALLICENCE 700 1- Pozdnyakova Olga Institute of Isotopes, CRC, HAS,, Budapest, Konkoly-Thege M. 29-33, H-1525, Hungary aut NATIONALLICENCE 700 1- Sauer Hermann Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut NATIONALLICENCE 700 1- Knop-Gericke Axel Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut NATIONALLICENCE 700 1- Schlögl Robert Department of Inorganic Chemistry, Fritz-Haber-Institut der MPG, Faradayweg 4-6, 14195 Berlin, Germany aut NATIONALLICENCE 773 0- Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 87/2(2006-04-01), 235-247 0133-1736 87:2<235 2006 87 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer