The Role of Oxides in Catalytic CO Oxidation over Rhodium and Palladium
(2018) In ACS Catalysis 8(5). p.4438-4445- Abstract
Catalytic CO oxidation is a seemingly simple reaction between CO and O2 molecules, one of the reactions in automotive catalytic converters, and the fruit-fly reaction in model catalysis. Surprisingly, the phase responsible for the catalytic activity is still under debate, despite decades of investigations. We have performed a simple but yet conclusive study of single crystal Rh and Pd model catalysts, resolving this controversy. For Rh, the oxygen-covered metallic surface is more active than the oxide, while for Pd, thin oxide films are at least as active as the metallic surface, but a thicker oxide is less active. Apart from resolving a long-standing debate, our results pinpoint important design principles for oxidation... (More)
Catalytic CO oxidation is a seemingly simple reaction between CO and O2 molecules, one of the reactions in automotive catalytic converters, and the fruit-fly reaction in model catalysis. Surprisingly, the phase responsible for the catalytic activity is still under debate, despite decades of investigations. We have performed a simple but yet conclusive study of single crystal Rh and Pd model catalysts, resolving this controversy. For Rh, the oxygen-covered metallic surface is more active than the oxide, while for Pd, thin oxide films are at least as active as the metallic surface, but a thicker oxide is less active. Apart from resolving a long-standing debate, our results pinpoint important design principles for oxidation catalysts as to prevent catalytic extinction at high oxygen exposures.
(Less)
- author
- organization
- publishing date
- 2018-05-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- active phase, CO oxidation, oxidation catalysis, oxide, palladium, rhodium, surface oxide
- in
- ACS Catalysis
- volume
- 8
- issue
- 5
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85046619013
- ISSN
- 2155-5435
- DOI
- 10.1021/acscatal.8b00498
- language
- English
- LU publication?
- yes
- id
- 3351ed81-7f5a-4eef-b895-5186ef2dcb4b
- date added to LUP
- 2018-05-24 13:23:36
- date last changed
- 2022-04-25 07:30:37
@article{3351ed81-7f5a-4eef-b895-5186ef2dcb4b, abstract = {{<p>Catalytic CO oxidation is a seemingly simple reaction between CO and O<sub>2</sub> molecules, one of the reactions in automotive catalytic converters, and the fruit-fly reaction in model catalysis. Surprisingly, the phase responsible for the catalytic activity is still under debate, despite decades of investigations. We have performed a simple but yet conclusive study of single crystal Rh and Pd model catalysts, resolving this controversy. For Rh, the oxygen-covered metallic surface is more active than the oxide, while for Pd, thin oxide films are at least as active as the metallic surface, but a thicker oxide is less active. Apart from resolving a long-standing debate, our results pinpoint important design principles for oxidation catalysts as to prevent catalytic extinction at high oxygen exposures.</p>}}, author = {{Gustafson, Johan and Balmes, Olivier and Zhang, Chu and Shipilin, Mikhail and Schaefer, Andreas and Hagman, Benjamin and Merte, Lindsay R. and Martin, Natalia M. and Carlsson, Per Anders and Jankowski, Maciej and Crumlin, Ethan J. and Lundgren, Edvin}}, issn = {{2155-5435}}, keywords = {{active phase; CO oxidation; oxidation catalysis; oxide; palladium; rhodium; surface oxide}}, language = {{eng}}, month = {{05}}, number = {{5}}, pages = {{4438--4445}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Catalysis}}, title = {{The Role of Oxides in Catalytic CO Oxidation over Rhodium and Palladium}}, url = {{http://dx.doi.org/10.1021/acscatal.8b00498}}, doi = {{10.1021/acscatal.8b00498}}, volume = {{8}}, year = {{2018}}, }