TY - JOUR
T1 - Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy
AU - Filez, Matthias
AU - Poelman, Hilde
AU - Redekop, Evgeniy A.
AU - Galvita, Vladimir V.
AU - Alexopoulos, Konstantinos
AU - Meledina, Maria
AU - Ramachandran, Ranjith K.
AU - Dendooven, Jolien
AU - Detavernier, Christophe
AU - Van Tendeloo, Gustaaf
AU - Safonova, Olga V.
AU - Nachtegaal, Maarten
AU - Weckhuysen, Bert M.
AU - Marin, Guy B.
N1 - Publisher Copyright:
© 2018 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/9/17
Y1 - 2018/9/17
N2 - Alloyed metal nanocatalysts are of environmental and economic importance in a plethora of chemical technologies. During the catalyst lifetime, supported alloy nanoparticles undergo dynamic changes which are well-recognized but still poorly understood. High-temperature O2–H2 redox cycling was applied to mimic the lifetime changes in model Pt13In9 nanocatalysts, while monitoring the induced changes by in situ quick X-ray absorption spectroscopy with one-second resolution. The different reaction steps involved in repeated Pt13In9 segregation-alloying are identified and kinetically characterized at the single-cycle level. Over longer time scales, sintering phenomena are substantiated and the intraparticle structure is revealed throughout the catalyst lifetime. The in situ time-resolved observation of the dynamic habits of alloyed nanoparticles and their kinetic description can impact catalysis and other fields involving (bi)metallic nanoalloys.
AB - Alloyed metal nanocatalysts are of environmental and economic importance in a plethora of chemical technologies. During the catalyst lifetime, supported alloy nanoparticles undergo dynamic changes which are well-recognized but still poorly understood. High-temperature O2–H2 redox cycling was applied to mimic the lifetime changes in model Pt13In9 nanocatalysts, while monitoring the induced changes by in situ quick X-ray absorption spectroscopy with one-second resolution. The different reaction steps involved in repeated Pt13In9 segregation-alloying are identified and kinetically characterized at the single-cycle level. Over longer time scales, sintering phenomena are substantiated and the intraparticle structure is revealed throughout the catalyst lifetime. The in situ time-resolved observation of the dynamic habits of alloyed nanoparticles and their kinetic description can impact catalysis and other fields involving (bi)metallic nanoalloys.
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U2 - 10.1002/anie.201806447
DO - 10.1002/anie.201806447
M3 - Article
C2 - 30067303
AN - SCOPUS:85052820407
VL - 57
SP - 12430
EP - 12434
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 38
ER -