Low-temperature CO oxidation by transition metal polycation exchanged low-silica faujasites
作者： O.P. Tkachenko , A.A. Greish , A.V. Kucherov , K.C. Weston , A.M. Tsybulevski
DOI: 10.1016/J.APCATB.2015.04.029
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摘要: Abstract The kinetics and mechanism of low-temperature carbon monoxide oxidation by transition metal polycation exchanged low-silica faujasite (LSF) are investigated. Single double Cu, Zn, Mn containing samples were prepared ion exchange with the corresponding salt solutions at conditions their partial hydrolysis. Catalytic tests micro reactor method demonstrated an exceptional activity novel catalysts in CO oxidation. Reaction measurements gradientless along ESR characterization DRIFT spectroscopy chemisorbed allowed to single out three different models over studied catalysts: a) Eley–Rideal for Zn-, Mn- MnCu-polycation LSF having zero order reaction rate first O 2 ; b) Mars–van Krevelen CuCaLSF catalyst 0.11 oxygen; c) autocatalytic model CuZn-polycation that is characterized both reactants, , a capability direct not involving free oxygen.
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