Adatom and Nanoparticle Dynamics on Single-Atom Catalyst Substrates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456670" target="_blank" >RIV/00216208:11320/22:10456670 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11510/22:10456670
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BNOnOpKfF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BNOnOpKfF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acscatal.2c00291" target="_blank" >10.1021/acscatal.2c00291</a>
Alternative languages
Result language
angličtina
Original language name
Adatom and Nanoparticle Dynamics on Single-Atom Catalyst Substrates
Original language description
Single-atom catalysts represent an essential and ever-growing family of heterogeneous catalysts. Recent studies indicate that besides the valuable catalytic properties provided by single-atom active sites, the presence of single-atom sites on the catalyst substrates may significantly influence the population of supported metal nanoparticles coexisting with metal single atoms. Treatment of ceria-based single-atom catalysts in oxidizing or reducing atmospheres was proven to provide a precise experimental control of the size of supported Pt nanoparticles and, correspondingly, a control of catalyst activity and stability. Based on dedicated surface science experiments, ab initio calculations, and kinetic Monte Carlo simulations, we demonstrate that the morphology of Pt nanoparticle population on ceria surface is a result of a competition for Pt atoms between Pt single-atom sites and Pt nanoparticles. In an oxidizing atmosphere, Pt single-atom sites provide strong bonding to single Pt atoms and Pt nanoparticles shrink. In reducing atmosphere, Pt single-atom sites are depopulated and Pt nanoparticles grow. We formulate a generic model of Pt redispersion and coarsening on ceria substrates. Our model provides a unified atomic-level explanation for a variety of metal nanoparticle dynamic processes observed in single-atom catalysts under stationary or alternating oxidizing/reducing atmospheres and allows us to classify the conditions under which nanoparticle ensembles on single-atom catalyst substrates can be stabilized against Ostwald ripening.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Catalysis
ISSN
2155-5435
e-ISSN
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Volume of the periodical
12
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
4859-4871
UT code for WoS article
000813203800001
EID of the result in the Scopus database
2-s2.0-85128790457