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

CO oxidation

oxidation catalysis

surface oxide

oxide

rhodium

palladium

Författare

Gustafson Johan

Lunds universitet

Olivier Balmes

Max IV-laboratoriet

Chu Zhang

Lunds universitet

Mikhail Shipilin

Stockholms universitet

Andreas Schaefer

Per-Anders Carlsson Group

Hagman Benjamin

Lunds universitet

Lindsay R. Merte

Max IV-laboratoriet

Natalia Mihaela Martin

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Per-Anders Carlsson

Per-Anders Carlsson Group

Jankowski Maciej

European Synchrotron Radiation Facility (ESRF)

Ethan J. Crumlin

Lawrence Berkeley National Laboratory

Lundgren Edvin

Lunds universitet

ACS Catalysis

2155-5435 (eISSN)

Vol. 8 4438-4445

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Materialkemi

Den kondenserade materiens fysik

DOI

10.1021/acscatal.8b00498