Non‐Thermal Plasma Activation of Gold‐Based Catalysts for Low‐Temperature Water–Gas Shift Catalysis. Issue 20 (12th April 2017)

• Record Type: Journal Article
• 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
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 20(2017)
• Page Start: 5579
• Page End: 5583
• Publication Date: 2017-04-12
• Subjects: carbon monoxide -- heterogeneous catalysis -- plasma catalysis -- thermodynamic equilibrium -- water–gas shift reaction; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201612370
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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. Abstract : 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.