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 4438-4445

Synergistisk 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

Mer information

Senast uppdaterat

2022-02-01