Non‐Thermal Plasma Activation of Gold‐Based Catalysts for Low‐Temperature Water–Gas Shift Catalysis

Non‐thermal plasma activation has been used to enable low‐temperature water‐gas shift over a Au/CeZrO4 catalyst. The activity obtained was comparable with that attained by heating the catalyst to 180 °C providing an opportunity for the hydrogen production to be obtained under conditions where the th...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2017-05, Vol.56 (20), p.5579-5583
Main Authors: Stere, Cristina E., Anderson, James A., Chansai, Sarayute, Delgado, Juan Jose, Goguet, Alexandre, Graham, Willam G., Hardacre, C., Taylor, S. F. Rebecca, Tu, Xin, Wang, Ziyun, Yang, Hui
Format: Article
Language:English
Subjects:
carbon monoxide
Catalysis
Catalysts
Communication
Communications
Deactivation
Fourier transforms
Gold
heterogeneous catalysis
Hydrogen production
Infrared spectroscopy
Low temperature
Nanoparticles
plasma catalysis
Temperature effects
Thermal plasmas
thermodynamic equilibrium
water–gas shift reaction
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Summary:Non‐thermal plasma activation has been used to enable low‐temperature water‐gas shift over a Au/CeZrO4 catalyst. The activity obtained was comparable with that attained by heating the catalyst to 180 °C providing an opportunity for the hydrogen production to be obtained under conditions where the thermodynamic limitations are minimal. Using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), structural changes associated with the gold nanoparticles in the catalyst have been observed which are not found under thermal activation indicating a weakening of the Au−CO bond and a change in the mechanism of deactivation. A route for hydrogen production by water—gas shift reaction under conditions where the thermodynamic limitations are minimal has been explored using a heterogeneous catalyst coupled with a dielectric‐barrier discharge. Structural changes have been observed which are not found under thermal activation, indicating a weakening of the Au−CO bond, a change in the mechanism of deactivation, and an alternative reaction pathway.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201612370