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 language | English |
|---|---|
| Article number | 443 |
| Number of pages | 5 |
| Journal | Frontiers in Chemistry |
| Volume | 7 |
| Issue number | JUN |
| DOIs | |
| Publication status | Published - 14 Jun 2019 |
Keywords
- Ceria-titania
- Ceria-zirconia
- Gold
- Heterogeneous catalysis
- Nanoparticles
- Water-gas shift
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Enhanced activity and stability of gold/ceria-titania for the low-temperature water-gas shift reaction. / Carter, James H.; Shah, Parag M.; Nowicka, Ewa; Freakley, Simon J.; Morgan, David J.; Golunski, Stan; Hutchings, Graham J.
In: Frontiers in Chemistry, Vol. 7, No. JUN, 443, 14.06.2019.Research output: Contribution to journal › Article
}
TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=85068552588&partnerID=8YFLogxK
U2 - 10.3389/fchem.2019.00443
DO - 10.3389/fchem.2019.00443
M3 - Article
VL - 7
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
SN - 2296-2646
IS - JUN
M1 - 443
ER -