Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor

Michael Bingham; Andrew Mills

doi:10.1016/j.jphotochem.2021.113133

Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor

Michael Bingham, Andrew Mills^*

^*Corresponding author for this work

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

Abstract

A series of different M/TiO₂ catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, and tested for activity as catalysts and photocatalysts for the water gas shift reaction, WGSR, using a continuous flow, gas phase reactor. For both the thermal (dark) and photocatalytic (UV irradiated) WGSR the best catalyst/photocatalyst is Au/TiO₂. The kinetics of the WGSR is studied as a function of reactor temperature, Au loading and concentrations of CO and H₂O. Langmuir-Hinshelwood kinetics are observed for the photocatalytic WGSR with non-competitive adsorption of the CO and H₂O, whereas those for the thermal WGSR fit a slightly more complex, previously reported, reaction mechanism. At 125 °C, with a 0.2 wt% loading, the Au/TiO₂ photocatalysis of the WGSR is very efficient, with a formal quantum efficiency for 1/2H₂ production of 57 %. The potential scale up of the relatively efficient photocatalytic WGSR is discussed briefly.

Original language	English
Article number	113133
Number of pages	8
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	409
Early online date	10 Jan 2021
DOIs	https://doi.org/10.1016/j.jphotochem.2021.113133
Publication status	Published - 15 Mar 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

Carbon monoxide
Catalysis
Gold
Photocatalysis
Titanium dioxide
Water gas shift

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Physics and Astronomy(all)

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Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor
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Embargo ends: 10/01/2022

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title = "Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor",

abstract = "A series of different M/TiO2 catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, and tested for activity as catalysts and photocatalysts for the water gas shift reaction, WGSR, using a continuous flow, gas phase reactor. For both the thermal (dark) and photocatalytic (UV irradiated) WGSR the best catalyst/photocatalyst is Au/TiO2. The kinetics of the WGSR is studied as a function of reactor temperature, Au loading and concentrations of CO and H2O. Langmuir-Hinshelwood kinetics are observed for the photocatalytic WGSR with non-competitive adsorption of the CO and H2O, whereas those for the thermal WGSR fit a slightly more complex, previously reported, reaction mechanism. At 125 °C, with a 0.2 wt% loading, the Au/TiO2 photocatalysis of the WGSR is very efficient, with a formal quantum efficiency for 1/2H2 production of 57 %. The potential scale up of the relatively efficient photocatalytic WGSR is discussed briefly.",

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T1 - Catalytic and photocatalytic water gas shift reaction (WGSR) using a continuous flow, gas phase reactor

AU - Bingham, Michael

AU - Mills, Andrew

PY - 2021/3/15

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N2 - A series of different M/TiO2 catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, and tested for activity as catalysts and photocatalysts for the water gas shift reaction, WGSR, using a continuous flow, gas phase reactor. For both the thermal (dark) and photocatalytic (UV irradiated) WGSR the best catalyst/photocatalyst is Au/TiO2. The kinetics of the WGSR is studied as a function of reactor temperature, Au loading and concentrations of CO and H2O. Langmuir-Hinshelwood kinetics are observed for the photocatalytic WGSR with non-competitive adsorption of the CO and H2O, whereas those for the thermal WGSR fit a slightly more complex, previously reported, reaction mechanism. At 125 °C, with a 0.2 wt% loading, the Au/TiO2 photocatalysis of the WGSR is very efficient, with a formal quantum efficiency for 1/2H2 production of 57 %. The potential scale up of the relatively efficient photocatalytic WGSR is discussed briefly.

AB - A series of different M/TiO2 catalysts are prepared, where M = Au, Pt, Pd and Ag, with a 0.2 wt% loading, and tested for activity as catalysts and photocatalysts for the water gas shift reaction, WGSR, using a continuous flow, gas phase reactor. For both the thermal (dark) and photocatalytic (UV irradiated) WGSR the best catalyst/photocatalyst is Au/TiO2. The kinetics of the WGSR is studied as a function of reactor temperature, Au loading and concentrations of CO and H2O. Langmuir-Hinshelwood kinetics are observed for the photocatalytic WGSR with non-competitive adsorption of the CO and H2O, whereas those for the thermal WGSR fit a slightly more complex, previously reported, reaction mechanism. At 125 °C, with a 0.2 wt% loading, the Au/TiO2 photocatalysis of the WGSR is very efficient, with a formal quantum efficiency for 1/2H2 production of 57 %. The potential scale up of the relatively efficient photocatalytic WGSR is discussed briefly.

KW - Carbon monoxide

KW - Catalysis

KW - Gold

KW - Photocatalysis

KW - Titanium dioxide

KW - Water gas shift

U2 - 10.1016/j.jphotochem.2021.113133

DO - 10.1016/j.jphotochem.2021.113133

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VL - 409

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

SN - 1010-6030

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