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.

X-Ray photoelectron spectroscopy

Density functional theory

CO Oxidation

Rhodium

Steps

Catalysis

Författare

Chu Zhang

Lunds universitet

Baochang Wang

Chalmers, Fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Anders Hellman

Chalmers, Fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

M. Shipilin

Alba Nova Universitetscentrum

Andreas Schaefer

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi

L. R. Merte

Malmö universitet

Sara Blomberg

Lunds universitet

Xueting Wang

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Kompetenscentrum katalys (KCK)

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 121928

Ämneskategorier

Oorganisk kemi

Materialkemi

Biokatalys och enzymteknik

DOI

10.1016/j.susc.2021.121928

Mer information

Senast uppdaterat

2021-10-04