Predicting Catalyst Performance From Pt/CeO2 Redispersion Kinetics
Abstract
Quantitative description of the structural dynamics of nanoparticles by kinetic data is challenging but would represent a significant knowledge leap, as this would enable the forecast of their properties, e.g., in catalysis. A striking example in catalysis is the redispersion of Pt nanoparticles into single atoms in Pt/CeO2-based catalysts. In this work, we combined environmental transmission electron microscopy (ETEM) measurements with catalytic data to monitor the individual decay of Pt nanoparticles on defined CeO2 nanocubes. Supported by density functional theory modeling, this provides unprecedented insight into their dynamic behavior, including kinetics. We observed that the rate of noble metal redispersion is strongly dependent on the local structural environment: the presence of other nearby nanoparticles and heterogeneities on the CeO2 surface reduced the redispersion rate. Independent of the initial particle size and local environment, the particle volume decreases linearly in time, indicating a constant flux of Pt atoms from the nanoparticles. These findings at the atomic scale were correlated to the observed changes in the integral catalytic performance, allowing a first prediction of the catalyst activity based on the redispersion process and demonstrating how atomic-scale kinetic insights can be correlated to macroscopic effects.
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BibTeX
@article{maurer2026predicting,
title = {{Predicting Catalyst Performance From Pt/CeO2 Redispersion Kinetics}},
author = {Florian Maurer and Agustin Salcedo and Maria Casapu and David Loffreda and Arik Beck and Paolo Dolcet and Mimoun Aouine and Thierry Epicier and Stéphane Loridant and Philippe Vernoux and Carine Michel and Jan-Dierk Grunwaldt},
journal = {Angewandte Chemie International Edition},
year = {2026},
month = jul,
doi = {10.1002/anie.4743891},
url = {https://hal.science/hal-05741775v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Predicting Catalyst Performance From Pt/CeO2 Redispersion Kinetics
AU - Florian Maurer
AU - Agustin Salcedo
AU - Maria Casapu
AU - David Loffreda
AU - Arik Beck
AU - Paolo Dolcet
AU - Mimoun Aouine
AU - Thierry Epicier
AU - Stéphane Loridant
AU - Philippe Vernoux
AU - Carine Michel
AU - Jan-Dierk Grunwaldt
PY - 2026
DA - 2026/07/26
JO - Angewandte Chemie International Edition
DO - 10.1002/anie.4743891
UR - https://hal.science/hal-05741775v1
AB - Quantitative description of the structural dynamics of nanoparticles by kinetic data is challenging but would represent a significant knowledge leap, as this would enable the forecast of their properties, e.g., in catalysis. A striking example in catalysis is the redispersion of Pt nanoparticles into single atoms in Pt/CeO2-based catalysts. In this work, we combined environmental transmission electron microscopy (ETEM) measurements with catalytic data to monitor the individual decay of Pt nanoparticles on defined CeO2 nanocubes. Supported by density functional theory modeling, this provides unprecedented insight into their dynamic behavior, including kinetics. We observed that the rate of noble metal redispersion is strongly dependent on the local structural environment: the presence of other nearby nanoparticles and heterogeneities on the CeO2 surface reduced the redispersion rate. Independent of the initial particle size and local environment, the particle volume decreases linearly in time, indicating a constant flux of Pt atoms from the nanoparticles. These findings at the atomic scale were correlated to the observed changes in the integral catalytic performance, allowing a first prediction of the catalyst activity based on the redispersion process and demonstrating how atomic-scale kinetic insights can be correlated to macroscopic effects.
SN - 1433-7851
SN - 1521-3773
ER -