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 - Funding Information:
M.F. acknowledges a European Union's Horizon 2020 research and innovation program under the Marie Sklodowska‐Curie grant agreement (No. 748563). E.A.R acknowledges the Marie Curie International Incoming Fellowship granted by the European Commission (No. 301703). This work was supported by the Fund for Scientific Research Flanders (G.0209.11), the “Long Term Structural Methusalem Funding by the Flemish Government”. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007–2013) under grant agreement No. 312284 (CALIPSO). We thanks the Swiss Light Source for providing beamtime at the SuperXAS beamline.
Funding Information:
M.F. acknowledges a European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement (No. 748563). E.A.R acknowledges the Marie Curie International Incoming Fellowship granted by the European Commission (No. 301703). This work was supported by the Fund for Scientific Research Flanders (G.0209.11), the ?Long Term Structural Methusalem Funding by the Flemish Government?. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007?2013) under grant agreement No. 312284 (CALIPSO). We thanks the Swiss Light Source for providing beamtime at the SuperXAS beamline.
Publisher Copyright:
© 2018 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
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 -