Low-temperature catalytic H2 oxidation over Au nanoparticle/TiO2 dual perimeter sites

Isabel Xiaoye Green; Wenjie Tang; Matthew Neurock; John T. Yates

doi:10.1002/anie.201101612

Low-temperature catalytic H₂ oxidation over Au nanoparticle/TiO₂ dual perimeter sites

Isabel Xiaoye Green
, Wenjie Tang
, Matthew Neurock
, John T. Yates

Chemical Engineering and Materials Science

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

108 Scopus citations

Abstract

The catalytic reaction of H₂+O₂ over a Au/TiO ₂ catalyst was studied by transmission IR spectroscopy and DFT calculations. A reaction path of O₂-assisted H₂ dissociation at the Au/TiO₂ dual perimeter site was found to proceed through a Ti-OOH intermediate (see scheme). The calculated barrier range (0.13-0.25 eV) for the sequence of low-energy steps agree with the experimental E_a of 0.22 eV.

Original language	English (US)
Pages (from-to)	10186-10189
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	50
Issue number	43
DOIs	https://doi.org/10.1002/anie.201101612
State	Published - Oct 17 2011

Keywords

H oxidation
gold catalysis
kinetic isotope effect
perimeter site
titania support

Publisher link

10.1002/anie.201101612

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abstract = "The catalytic reaction of H2+O2 over a Au/TiO 2 catalyst was studied by transmission IR spectroscopy and DFT calculations. A reaction path of O2-assisted H2 dissociation at the Au/TiO2 dual perimeter site was found to proceed through a Ti-OOH intermediate (see scheme). The calculated barrier range (0.13-0.25 eV) for the sequence of low-energy steps agree with the experimental Ea of 0.22 eV.",

keywords = "H oxidation, gold catalysis, kinetic isotope effect, perimeter site, titania support",

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AU - Neurock, Matthew

AU - Yates, John T.

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AB - The catalytic reaction of H2+O2 over a Au/TiO 2 catalyst was studied by transmission IR spectroscopy and DFT calculations. A reaction path of O2-assisted H2 dissociation at the Au/TiO2 dual perimeter site was found to proceed through a Ti-OOH intermediate (see scheme). The calculated barrier range (0.13-0.25 eV) for the sequence of low-energy steps agree with the experimental Ea of 0.22 eV.

KW - H oxidation

KW - gold catalysis

KW - kinetic isotope effect

KW - perimeter site

KW - titania support

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