Steps and catalytic reactions: CO oxidation with preadsorbed O on Rh(553)
Artikel i vetenskaplig tidskrift, 2022
Industrial catalysts are often comprised of nanoparticles supported on high-surface-area oxides, in order to maximise the catalytically active surface area and thereby utilise the active material better. These nanoparticles expose steps and corners that, due to low coordination to neighboring atoms, are more reactive and, as a consequence, are often assumed to have higher catalytic activity. We have investigated the reaction between CO and preadsorbed O on a stepped Rh(553) surface, and show that CO oxidation indeed occurs faster than on the flat Rh(111) surface at the same temperature. However, we do find that this is not a result of reactions at the step sites but rather at the terrace sites close to the steps, due to in-plane relaxation enabled by the step. This insight can provide ways to optimize the shape of the nanoparticles to further improve the activity of certain reactions.
Steps
X-Ray photoelectron spectroscopy
Rhodium
Catalysis
Density functional theory
CO Oxidation
Författare
Chu Zhang
Lunds universitet
Baochang Wang
Kompetenscentrum katalys
Chalmers, Fysik, Kemisk fysik
Anders Hellman
Kompetenscentrum katalys
Chalmers, Fysik, Kemisk fysik
M. Shipilin
Alba Nova Universitetscentrum
Andreas Schaefer
Kompetenscentrum katalys
Chalmers, Kemi och kemiteknik, Tillämpad kemi
L. R. Merte
Malmö universitet
Sara Blomberg
Lunds universitet
Xueting Wang
Kompetenscentrum katalys
Polymerteknologi
Per-Anders Carlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Edvin Lundgren
Lunds universitet
Jonas Weissenrieder
Kungliga Tekniska Högskolan (KTH)
Andrea Resta
SOLEIL Synchrotron
Anders Mikkelsen
Lunds universitet
Jesper N. Andersen
Lunds universitet
Johan Gustafsson
Lunds universitet
Surface Science
0039-6028 (ISSN)
Vol. 715 121928Ämneskategorier
Oorganisk kemi
Materialkemi
Biokatalys och enzymteknik
DOI
10.1016/j.susc.2021.121928