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- W2898062435 abstract "Pd/CeO2 is an active component in emission control catalysts for CO oxidation. Nanostructured CeO2 powders can be prepared in the form of rods exposing predominantly (111) surfaces and cubes exposing (100) surfaces. While differences in the reactivity of Pd supported on these facets of ceria have been reported, the origins of the reactivity differences are not well understood. Pd supported on (111) surfaces of ceria rods exhibits room-temperature CO oxidation activity, while Pd on (100) surface of ceria cubes shows comparable activity at a temperature that is 60 °C higher. Earlier, we established that Pd/CeO2-rods are active due to a Langmuir-Hinshelwood mechanism involving isolated Pd atoms in the form of Pd1O and Pd1O2 species. Here, we establish using in situ CO IR spectroscopy and density functional theory (DFT) that, in addition to TEM-visible Pd nanoparticles, Pd/CeO2-cubes also contain isolated Pd species, predominantly in the form of Pd1O. DFT calculations show that CO oxidation proceeds via a Mars-van Krevelen pathway, which is possible for the (100) surface because of the lower Ce-O binding energy compared to the (111) surface. Overall, the catalytic cycle for CO oxidation on Pd/CeO2(100) involves a higher free energy barrier than on Pd/CeO2(111) in keeping with the experimentally observed activity difference. EXAFS measurements show that the active Pd phase in both Pd/CeO2-rods and Pd/CeO2-cubes responds dynamically with respect to reducing and oxidizing conditions. The redispersion of Pd in oxidative conditions is more pronounced for Pd/CeO2-rods and the catalyst is more active after an oxidative treatment." @default.
- W2898062435 created "2018-10-26" @default.
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- W2898062435 date "2019-04-01" @default.
- W2898062435 modified "2023-10-14" @default.
- W2898062435 title "CO oxidation by Pd supported on CeO2(100) and CeO2(111) facets" @default.
- W2898062435 cites W166846561 @default.
- W2898062435 cites W1963688192 @default.
- W2898062435 cites W1963729274 @default.
- W2898062435 cites W1965952663 @default.
- W2898062435 cites W1969883020 @default.
- W2898062435 cites W1970127494 @default.
- W2898062435 cites W1976414617 @default.
- W2898062435 cites W1979544533 @default.
- W2898062435 cites W1981368803 @default.
- W2898062435 cites W1982220534 @default.
- W2898062435 cites W1984834960 @default.
- W2898062435 cites W1986731219 @default.
- W2898062435 cites W1996030617 @default.
- W2898062435 cites W1999184945 @default.
- W2898062435 cites W2000827309 @default.
- W2898062435 cites W2001766823 @default.
- W2898062435 cites W2007395042 @default.
- W2898062435 cites W2008033919 @default.
- W2898062435 cites W2015318144 @default.
- W2898062435 cites W2015687437 @default.
- W2898062435 cites W2026207206 @default.
- W2898062435 cites W2028098830 @default.
- W2898062435 cites W2034496824 @default.
- W2898062435 cites W2035430220 @default.
- W2898062435 cites W2037034031 @default.
- W2898062435 cites W2037542805 @default.
- W2898062435 cites W2041170068 @default.
- W2898062435 cites W2043691039 @default.
- W2898062435 cites W2045974246 @default.
- W2898062435 cites W2049050244 @default.
- W2898062435 cites W2050750228 @default.
- W2898062435 cites W2053140988 @default.
- W2898062435 cites W2054097386 @default.
- W2898062435 cites W2054765464 @default.
- W2898062435 cites W2057980421 @default.
- W2898062435 cites W2059411852 @default.
- W2898062435 cites W2064552311 @default.
- W2898062435 cites W2070227796 @default.
- W2898062435 cites W2073380760 @default.
- W2898062435 cites W2074600210 @default.
- W2898062435 cites W2076376028 @default.
- W2898062435 cites W2079664238 @default.
- W2898062435 cites W2081099024 @default.
- W2898062435 cites W2083205829 @default.
- W2898062435 cites W2083222334 @default.
- W2898062435 cites W2086108578 @default.
- W2898062435 cites W2087617618 @default.
- W2898062435 cites W2093267743 @default.
- W2898062435 cites W2100711723 @default.
- W2898062435 cites W2103009034 @default.
- W2898062435 cites W2103943038 @default.
- W2898062435 cites W2106434588 @default.
- W2898062435 cites W2106520841 @default.
- W2898062435 cites W2122427541 @default.
- W2898062435 cites W2134432828 @default.
- W2898062435 cites W2139598701 @default.
- W2898062435 cites W2149058235 @default.
- W2898062435 cites W2164365848 @default.
- W2898062435 cites W2260030374 @default.
- W2898062435 cites W2281705920 @default.
- W2898062435 cites W2334080192 @default.
- W2898062435 cites W2342691188 @default.
- W2898062435 cites W2474398724 @default.
- W2898062435 cites W2515091458 @default.
- W2898062435 cites W2560681522 @default.
- W2898062435 cites W2753894022 @default.
- W2898062435 cites W2768945949 @default.
- W2898062435 cites W2773935583 @default.
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- W2898062435 doi "https://doi.org/10.1016/j.apcatb.2018.10.015" @default.
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