TY - JOUR
T1 - Fischer Tropsch synthesis
T2 - Deuterium isotopic study for the formation of oxygenates over CeO 2 supported Pt-Co catalysts
AU - Gnanamani, Muthu Kumaran
AU - Jacobs, Gary
AU - Shafer, Wilson D.
AU - Ribeiro, Mauro C.
AU - Pendyala, Venkat Ramana Rao
AU - Ma, Wenping
AU - Davis, Burtron H.
PY - 2012/8/5
Y1 - 2012/8/5
N2 - The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO 2 catalyst. CeO 2 supported Pt-Co catalyst is more selective towards methane and oxygenates. H 2-D 2-H 2 switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO 2 interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.
AB - The effect of deuterium on Fischer-Tropsch (FT) synthesis was investigated over a Pt promoted Co/CeO 2 catalyst. CeO 2 supported Pt-Co catalyst is more selective towards methane and oxygenates. H 2-D 2-H 2 switching experiments suggest that the hydrogenation of CO is involved in the rate determining step (inverse isotope effect). The suppression of oxygenate formation with deuterium leads to the conclusion that common FT intermediates are responsible for the observed shift in the product spectrum. The deuterium isotopic study supports our previously proposed mechanism for the formation of alcohols in that the Co-CeO 2 interface is involved in the catalysis, such that termination of chain growth occurs at the metal-oxide junction and involves bridging OH groups on partially reduced ceria.
KW - Ceria
KW - Cobalt catalyst
KW - Deuterium isotope effect
KW - Fischer-Tropsch synthesis
KW - Oxygenates
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U2 - 10.1016/j.catcom.2012.03.028
DO - 10.1016/j.catcom.2012.03.028
M3 - Article
AN - SCOPUS:84861569319
SN - 1566-7367
VL - 25
SP - 12
EP - 17
JO - Catalysis Communications
JF - Catalysis Communications
ER -