TY - GEN
T1 - Ethanol oxidation on metal oxide supported platinum catalyst
AU - Petkovic, Lucia M.
AU - Rashkeev, Sergey N.
AU - Ginosar, Daniel M.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Ethanol is a renewable fuel that can be used as an additive to gasoline with the advantage of octane enhancement and reduced carbon monoxide exhaust emissions. However, on the standard three-way catalysts, the conversion of unburned ethanol is low because both ethanol and acetaldehyde are highly resistant to oxidation. In this work we use a combination of in-situ diffuse reflectance infrared spectroscopy (DRIFTS) analysis and first-principles density-functional calculations to uncover the fundamental phenomena associated with ethanol oxidation on Pt containing catalysts. We show that Pt particles accumulate oxygen at their surface and play the key role in burning ethanol molecules and their fragments. The oxide surfaces at which the mobility of molecular fragments is high provide the highest supply rate of these objects to the Pt particles (and the highest oxidation rate). These results explain the differences in ethanol oxidation process on the Pt-on-silica and Pt-on-alumina catalysts.
AB - Ethanol is a renewable fuel that can be used as an additive to gasoline with the advantage of octane enhancement and reduced carbon monoxide exhaust emissions. However, on the standard three-way catalysts, the conversion of unburned ethanol is low because both ethanol and acetaldehyde are highly resistant to oxidation. In this work we use a combination of in-situ diffuse reflectance infrared spectroscopy (DRIFTS) analysis and first-principles density-functional calculations to uncover the fundamental phenomena associated with ethanol oxidation on Pt containing catalysts. We show that Pt particles accumulate oxygen at their surface and play the key role in burning ethanol molecules and their fragments. The oxide surfaces at which the mobility of molecular fragments is high provide the highest supply rate of these objects to the Pt particles (and the highest oxidation rate). These results explain the differences in ethanol oxidation process on the Pt-on-silica and Pt-on-alumina catalysts.
UR - http://www.scopus.com/inward/record.url?scp=78649514696&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649514696&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78649514696
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Y2 - 22 March 2009 through 26 March 2009
ER -