Activation of oxygen by metallic gold in Au/TiO2 catalysts

Sven Schroeder; Norbert Weiher; Angela M. Beesley; Nikolaos Tsapatsaris; Laurent Delannoy; Catherine Louis; Jeroen A. Van Bokhoven; Sven L M Schroeder

doi:10.1021/ja067316c

Activation of oxygen by metallic gold in Au/TiO2 catalysts

Sven Schroeder, Norbert Weiher, Angela M. Beesley, Nikolaos Tsapatsaris, Laurent Delannoy, Catherine Louis, Jeroen A. Van Bokhoven, Sven L M Schroeder

Research output: Contribution to journal › Article › peer-review

Abstract

Ever since the discovery of heterogeneous gold catalysts for low-temperature oxidation reactions, the mechanism of O2 dissociation on these materials has been controversial. We report Au L3-edge X-ray absorption near-edge structure (XANES) data for an active Au/TiO2 catalyst which indicate that fully reduced metallic gold particles on a reducible support (TiO2) form activated gold-oxygen complexes in the absence of CO. It is possible that these play a role in the mechanism of CO oxidation. These results were obtained with a highly active powder catalyst and the conclusions agree with those derived from model catalysts, for which it was shown that reduced gold is the active component in the oxidation of CO. Copyright © 2007 American Chemical Society.

Original language	English
Pages (from-to)	2240-2241
Number of pages	1
Journal	Journal of the American Chemical Society
Volume	129
Issue number	8
DOIs	https://doi.org/10.1021/ja067316c
Publication status	Published - 28 Feb 2007

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@article{5b41245b8eed4a21974bbd988e792b86,

title = "Activation of oxygen by metallic gold in Au/TiO2 catalysts",

abstract = "Ever since the discovery of heterogeneous gold catalysts for low-temperature oxidation reactions, the mechanism of O2 dissociation on these materials has been controversial. We report Au L3-edge X-ray absorption near-edge structure (XANES) data for an active Au/TiO2 catalyst which indicate that fully reduced metallic gold particles on a reducible support (TiO2) form activated gold-oxygen complexes in the absence of CO. It is possible that these play a role in the mechanism of CO oxidation. These results were obtained with a highly active powder catalyst and the conclusions agree with those derived from model catalysts, for which it was shown that reduced gold is the active component in the oxidation of CO. Copyright {\textcopyright} 2007 American Chemical Society.",

author = "Sven Schroeder and Norbert Weiher and Beesley, {Angela M.} and Nikolaos Tsapatsaris and Laurent Delannoy and Catherine Louis and {Van Bokhoven}, {Jeroen A.} and Schroeder, {Sven L M}",

year = "2007",

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day = "28",

doi = "10.1021/ja067316c",

language = "English",

volume = "129",

pages = "2240--2241",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

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TY - JOUR

T1 - Activation of oxygen by metallic gold in Au/TiO2 catalysts

AU - Schroeder, Sven

AU - Weiher, Norbert

AU - Beesley, Angela M.

AU - Tsapatsaris, Nikolaos

AU - Delannoy, Laurent

AU - Louis, Catherine

AU - Van Bokhoven, Jeroen A.

AU - Schroeder, Sven L M

PY - 2007/2/28

Y1 - 2007/2/28

N2 - Ever since the discovery of heterogeneous gold catalysts for low-temperature oxidation reactions, the mechanism of O2 dissociation on these materials has been controversial. We report Au L3-edge X-ray absorption near-edge structure (XANES) data for an active Au/TiO2 catalyst which indicate that fully reduced metallic gold particles on a reducible support (TiO2) form activated gold-oxygen complexes in the absence of CO. It is possible that these play a role in the mechanism of CO oxidation. These results were obtained with a highly active powder catalyst and the conclusions agree with those derived from model catalysts, for which it was shown that reduced gold is the active component in the oxidation of CO. Copyright © 2007 American Chemical Society.

AB - Ever since the discovery of heterogeneous gold catalysts for low-temperature oxidation reactions, the mechanism of O2 dissociation on these materials has been controversial. We report Au L3-edge X-ray absorption near-edge structure (XANES) data for an active Au/TiO2 catalyst which indicate that fully reduced metallic gold particles on a reducible support (TiO2) form activated gold-oxygen complexes in the absence of CO. It is possible that these play a role in the mechanism of CO oxidation. These results were obtained with a highly active powder catalyst and the conclusions agree with those derived from model catalysts, for which it was shown that reduced gold is the active component in the oxidation of CO. Copyright © 2007 American Chemical Society.

U2 - 10.1021/ja067316c

DO - 10.1021/ja067316c

M3 - Article

SN - 0002-7863

VL - 129

SP - 2240

EP - 2241

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 8

ER -

Activation of oxygen by metallic gold in Au/TiO2 catalysts

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