Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | ACS National Meeting Book of Abstracts |
| Publication status | Published - 1 Dec 2009 |
| Externally published | Yes |
| Event | 237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States Duration: 22 Mar 2009 → 26 Mar 2009 |
Other
| Other | 237th National Meeting and Exposition of the American Chemical Society, ACS 2009 |
|---|---|
| Country | United States |
| City | Salt Lake City, UT |
| Period | 22/3/09 → 26/3/09 |
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ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
Cite this
Ethanol oxidation on metal oxide supported platinum catalyst. / Petkovic, Lucia M.; Rashkeev, Sergey; Ginosar, Daniel M.
ACS National Meeting Book of Abstracts. 2009.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Ethanol oxidation on metal oxide supported platinum catalyst
AU - Petkovic, Lucia M.
AU - Rashkeev, Sergey
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.
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M3 - Conference contribution
SN - 9780841224414
BT - ACS National Meeting Book of Abstracts
ER -