Observation of the active site in the catalytic oxidation of CO on Au/TiO2

Isabel X. Green; Wenjie Tang; Mathew Neurock; John T. Yates

Observation of the active site in the catalytic oxidation of CO on Au/TiO₂

Isabel X. Green, Wenjie Tang, Mathew Neurock, John T. Yates

Chemical Engineering and Materials Science

Research output: Contribution to journal › Conference article › peer-review

Abstract

The active site for CO oxidation on nanoparticle Au/TiO₂ catalysts has been discerned from IR spectroscopic studies of the process at ∼ 120 K, where kinetic simplifications exist due to the low temperature. It has been found that in the presence of O₂(g), the Au particles (∼2 nm diameter) catalyze the formation of CO₂ from CO molecules which are adsorbed on the TiO₂. Accurate first-order kinetics in CO coverage on TiO₂ are observed, and surprisingly CO coadsorbed on Au is found to be much less active. These results clearly indicate that the interface between Au and TiO₂ possesses the catalytic activity observed, in agreement with indirect or theoretical deductions by others.

Original language	English (US)
Journal	ACS National Meeting Book of Abstracts
State	Published - Aug 25 2011
Event	241st ACS National Meeting and Exposition - Anaheim, CA, United States Duration: Mar 27 2011 → Mar 31 2011

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title = "Observation of the active site in the catalytic oxidation of CO on Au/TiO2",

abstract = "The active site for CO oxidation on nanoparticle Au/TiO2 catalysts has been discerned from IR spectroscopic studies of the process at ∼ 120 K, where kinetic simplifications exist due to the low temperature. It has been found that in the presence of O2(g), the Au particles (∼2 nm diameter) catalyze the formation of CO2 from CO molecules which are adsorbed on the TiO2. Accurate first-order kinetics in CO coverage on TiO2 are observed, and surprisingly CO coadsorbed on Au is found to be much less active. These results clearly indicate that the interface between Au and TiO2 possesses the catalytic activity observed, in agreement with indirect or theoretical deductions by others.",

author = "Green, {Isabel X.} and Wenjie Tang and Mathew Neurock and Yates, {John T.}",

year = "2011",

month = aug,

day = "25",

language = "English (US)",

journal = "ACS National Meeting Book of Abstracts",

issn = "0065-7727",

publisher = "American Chemical Society",

note = "241st ACS National Meeting and Exposition ; Conference date: 27-03-2011 Through 31-03-2011",

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TY - JOUR

T1 - Observation of the active site in the catalytic oxidation of CO on Au/TiO2

AU - Green, Isabel X.

AU - Tang, Wenjie

AU - Neurock, Mathew

AU - Yates, John T.

PY - 2011/8/25

Y1 - 2011/8/25

N2 - The active site for CO oxidation on nanoparticle Au/TiO2 catalysts has been discerned from IR spectroscopic studies of the process at ∼ 120 K, where kinetic simplifications exist due to the low temperature. It has been found that in the presence of O2(g), the Au particles (∼2 nm diameter) catalyze the formation of CO2 from CO molecules which are adsorbed on the TiO2. Accurate first-order kinetics in CO coverage on TiO2 are observed, and surprisingly CO coadsorbed on Au is found to be much less active. These results clearly indicate that the interface between Au and TiO2 possesses the catalytic activity observed, in agreement with indirect or theoretical deductions by others.

AB - The active site for CO oxidation on nanoparticle Au/TiO2 catalysts has been discerned from IR spectroscopic studies of the process at ∼ 120 K, where kinetic simplifications exist due to the low temperature. It has been found that in the presence of O2(g), the Au particles (∼2 nm diameter) catalyze the formation of CO2 from CO molecules which are adsorbed on the TiO2. Accurate first-order kinetics in CO coverage on TiO2 are observed, and surprisingly CO coadsorbed on Au is found to be much less active. These results clearly indicate that the interface between Au and TiO2 possesses the catalytic activity observed, in agreement with indirect or theoretical deductions by others.

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M3 - Conference article

AN - SCOPUS:80051863614

SN - 0065-7727

JO - ACS National Meeting Book of Abstracts

JF - ACS National Meeting Book of Abstracts

T2 - 241st ACS National Meeting and Exposition

Y2 - 27 March 2011 through 31 March 2011

ER -

Observation of the active site in the catalytic oxidation of CO on Au/TiO₂

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