The Role of Oxides in Catalytic CO Oxidation over Rhodium and Palladium
Artikel i vetenskaplig tidskrift, 2018
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 oxidefilms 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.
active phase
palladium
rhodium
oxidation catalysis
CO oxidation
oxide
surface oxide
Författare
Gustafson Johan
Lunds universitet
Olivier Balmes
Max IV-laboratoriet
Chu Zhang
Lunds universitet
Mikhail Shipilin
Stockholms universitet
Andreas Schaefer
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Hagman Benjamin
Lunds universitet
Lindsay Merte
Chalmers, Fysik, Kemisk fysik
Max IV-laboratoriet
Natalia Mihaela Martin
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Per-Anders Carlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Jankowski Maciej
European Synchrotron Radiation Facility (ESRF)
Ethan J. Crumlin
Lawrence Berkeley National Laboratory
Lundgren Edvin
Lunds universitet
ACS Catalysis
21555435 (eISSN)
Vol. 8 5 4438-4445Synergistisk utveckling av rötngentekniker och tillämpbara tunna oxider för hållbar kemi
Vetenskapsrådet (VR) (2017-06709), 2018-04-04 -- 2021-12-31.
Tidsupplösta in situ metoder för design av katalytiska säten för hållbar kemi
Vetenskapsrådet (VR) (2013-567), 2013-01-01 -- 2016-12-31.
Drivkrafter
Hållbar utveckling
Styrkeområden
Transport
Energi
Materialvetenskap
Ämneskategorier
Materialkemi
Den kondenserade materiens fysik
DOI
10.1021/acscatal.8b00498