TY - JOUR
T1 - Size of cerium dioxide support nanocrystals dictates reactivity of highly dispersed palladium catalysts
AU - Muravev, Valerii
AU - Parastaev, Alexander
AU - van den Bosch, Yannis C.A.
AU - Ligt, B.
AU - Claes, Nathalie
AU - Bals, Sara
AU - Kosinov, Nikolay A.
AU - Hensen, Emiel J.M.
PY - 2023/6/16
Y1 - 2023/6/16
N2 - The catalytic performance of heterogeneous catalysts can be tuned by modulation of the size and structure of supported transition metals, which are typically regarded as the active sites. In single-atom metal catalysts, the support itself can strongly affect the catalytic properties. Here, we demonstrate that the size of cerium dioxide (CeO
2) support governs the reactivity of atomically dispersed palladium (Pd) in carbon monoxide (CO) oxidation. Catalysts with small CeO
2 nanocrystals (~4 nanometers) exhibit unusually high activity in a CO-rich reaction feed, whereas catalysts with medium-size CeO
2 (~8 nanometers) are preferred for lean conditions. Detailed spectroscopic investigations reveal support size-dependent redox properties of the Pd-CeO
2 interface.
AB - The catalytic performance of heterogeneous catalysts can be tuned by modulation of the size and structure of supported transition metals, which are typically regarded as the active sites. In single-atom metal catalysts, the support itself can strongly affect the catalytic properties. Here, we demonstrate that the size of cerium dioxide (CeO
2) support governs the reactivity of atomically dispersed palladium (Pd) in carbon monoxide (CO) oxidation. Catalysts with small CeO
2 nanocrystals (~4 nanometers) exhibit unusually high activity in a CO-rich reaction feed, whereas catalysts with medium-size CeO
2 (~8 nanometers) are preferred for lean conditions. Detailed spectroscopic investigations reveal support size-dependent redox properties of the Pd-CeO
2 interface.
KW - Palladium/chemistry
KW - Carbon Monoxide/chemistry
KW - Nanoparticles
KW - Cerium/chemistry
UR - https://www.tue.nl/en/research/researchers/emiel-hensen
UR - http://www.scopus.com/inward/record.url?scp=85163905179&partnerID=8YFLogxK
U2 - 10.1126/science.adf9082
DO - 10.1126/science.adf9082
M3 - Article
C2 - 37319196
SN - 0036-8075
VL - 380
SP - 1174
EP - 1179
JO - Science
JF - Science
IS - 6650
ER -