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

Research output: Contribution to journalArticle

2 Citations (Scopus)

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.

Original languageEnglish
Article number443
Number of pages5
JournalFrontiers in Chemistry
Volume7
Issue numberJUN
DOIs
Publication statusPublished - 14 Jun 2019

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)

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