Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction

James H. Carter; Parag M. Shah; Ewa Nowicka; Simon J. Freakley; David J. Morgan; Stan Golunski; Graham J. Hutchings

doi:10.3389/fchem.2019.00443

Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction

James H. Carter, Parag M. Shah, Ewa Nowicka, Simon J. Freakley, David J. Morgan, Stan Golunski, Graham J. Hutchings

Department of Chemistry

Cardiff University

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

15 Citations (SciVal)

Abstract

Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions. In this study, ceria-titania was evaluated as an alternative catalyst support. Materials of different Ce:Ti compositions were synthesized using a sol-gel methodology and gold was supported onto these using a deposition-precipitation method. They were then investigated as catalysts for the low-temperature water-gas shift reaction. Au/Ce_0.2Ti_0.8O₂ exhibited superior activity and stability to a highly active, previously reported gold catalyst supported on ceria-zirconia. High activity and stability was found to be related to the support comprising a high number of oxygen defect sites and a high specific surface area. These properties were conducive to forming a highly active catalyst with well-dispersed Au species.

Original language	English
Article number	443
Number of pages	5
Journal	Frontiers in Chemistry
Volume	7
Issue number	JUN
DOIs	https://doi.org/10.3389/fchem.2019.00443
Publication status	Published - 14 Jun 2019

Keywords

Ceria-titania
Ceria-zirconia
Gold
Heterogeneous catalysis
Nanoparticles
Water-gas shift

ASJC Scopus subject areas

General Chemistry

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title = "Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction",

abstract = "Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions. In this study, ceria-titania was evaluated as an alternative catalyst support. Materials of different Ce:Ti compositions were synthesized using a sol-gel methodology and gold was supported onto these using a deposition-precipitation method. They were then investigated as catalysts for the low-temperature water-gas shift reaction. Au/Ce0.2Ti0.8O2 exhibited superior activity and stability to a highly active, previously reported gold catalyst supported on ceria-zirconia. High activity and stability was found to be related to the support comprising a high number of oxygen defect sites and a high specific surface area. These properties were conducive to forming a highly active catalyst with well-dispersed Au species.",

keywords = "Ceria-titania, Ceria-zirconia, Gold, Heterogeneous catalysis, Nanoparticles, Water-gas shift",

author = "Carter, {James H.} and Shah, {Parag M.} and Ewa Nowicka and Freakley, {Simon J.} and Morgan, {David J.} and Stan Golunski and Hutchings, {Graham J.}",

year = "2019",

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doi = "10.3389/fchem.2019.00443",

language = "English",

volume = "7",

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T1 - Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction

AU - Carter, James H.

AU - Shah, Parag M.

AU - Nowicka, Ewa

AU - Freakley, Simon J.

AU - Morgan, David J.

AU - Golunski, Stan

AU - Hutchings, Graham J.

PY - 2019/6/14

Y1 - 2019/6/14

N2 - Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions. In this study, ceria-titania was evaluated as an alternative catalyst support. Materials of different Ce:Ti compositions were synthesized using a sol-gel methodology and gold was supported onto these using a deposition-precipitation method. They were then investigated as catalysts for the low-temperature water-gas shift reaction. Au/Ce0.2Ti0.8O2 exhibited superior activity and stability to a highly active, previously reported gold catalyst supported on ceria-zirconia. High activity and stability was found to be related to the support comprising a high number of oxygen defect sites and a high specific surface area. These properties were conducive to forming a highly active catalyst with well-dispersed Au species.

AB - Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions. In this study, ceria-titania was evaluated as an alternative catalyst support. Materials of different Ce:Ti compositions were synthesized using a sol-gel methodology and gold was supported onto these using a deposition-precipitation method. They were then investigated as catalysts for the low-temperature water-gas shift reaction. Au/Ce0.2Ti0.8O2 exhibited superior activity and stability to a highly active, previously reported gold catalyst supported on ceria-zirconia. High activity and stability was found to be related to the support comprising a high number of oxygen defect sites and a high specific surface area. These properties were conducive to forming a highly active catalyst with well-dispersed Au species.

KW - Ceria-titania

KW - Ceria-zirconia

KW - Gold

KW - Heterogeneous catalysis

KW - Nanoparticles

KW - Water-gas shift

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DO - 10.3389/fchem.2019.00443

M3 - Article

AN - SCOPUS:85068552588

SN - 2296-2646

VL - 7

JO - Frontiers in Chemistry

JF - Frontiers in Chemistry

IS - JUN

M1 - 443

ER -

Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction

Abstract

Keywords

ASJC Scopus subject areas

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