Ethanol oxidation on metal oxide supported platinum catalyst

Lucia M. Petkovic, Sergey Rashkeev, Daniel M. Ginosar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Publication statusPublished - 1 Dec 2009
Externally publishedYes
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: 22 Mar 200926 Mar 2009

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period22/3/0926/3/09

Fingerprint

Platinum
Ethanol
Metals
Oxidation
Catalysts
Oxides
Acetaldehyde
Aluminum Oxide
Carbon Monoxide
Carbon monoxide
Silicon Dioxide
Density functional theory
Gasoline
platinum oxide
Infrared spectroscopy
Alumina
Silica
Oxygen
Molecules

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Petkovic, L. M., Rashkeev, S., & Ginosar, D. M. (2009). Ethanol oxidation on metal oxide supported platinum catalyst. In ACS National Meeting Book of Abstracts

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 proceedingConference contribution

Petkovic, LM, Rashkeev, S & Ginosar, DM 2009, Ethanol oxidation on metal oxide supported platinum catalyst. in ACS National Meeting Book of Abstracts. 237th National Meeting and Exposition of the American Chemical Society, ACS 2009, Salt Lake City, UT, United States, 22/3/09.
Petkovic LM, Rashkeev S, Ginosar DM. Ethanol oxidation on metal oxide supported platinum catalyst. In ACS National Meeting Book of Abstracts. 2009
Petkovic, Lucia M. ; Rashkeev, Sergey ; Ginosar, Daniel M. / Ethanol oxidation on metal oxide supported platinum catalyst. ACS National Meeting Book of Abstracts. 2009.
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