Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy

Matthias Filez; Hilde Poelman; Evgeniy A. Redekop; Vladimir V. Galvita; Konstantinos Alexopoulos; Maria Meledina; Ranjith K. Ramachandran; Jolien Dendooven; Christophe Detavernier; Gustaaf Van Tendeloo; Olga V. Safonova; Maarten Nachtegaal; Bert M. Weckhuysen; Guy B. Marin

doi:10.1002/anie.201806447

Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy

Matthias Filez, Hilde Poelman, Evgeniy A. Redekop, Vladimir V. Galvita, Konstantinos Alexopoulos, Maria Meledina, Ranjith K. Ramachandran, Jolien Dendooven, Christophe Detavernier, Gustaaf Van Tendeloo, Olga V. Safonova, Maarten Nachtegaal, Bert M. Weckhuysen, Guy B. Marin

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	12430-12434
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	38
DOIs	https://doi.org/10.1002/anie.201806447
State	Published - Sep 17 2018

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

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Filez, M., Poelman, H., Redekop, E. A., Galvita, V. V., Alexopoulos, K., Meledina, M., Ramachandran, R. K., Dendooven, J., Detavernier, C., Van Tendeloo, G., Safonova, O. V., Nachtegaal, M., Weckhuysen, B. M., & Marin, G. B. (2018). Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy. Angewandte Chemie - International Edition, 57(38), 12430-12434. https://doi.org/10.1002/anie.201806447

Filez, Matthias ; Poelman, Hilde ; Redekop, Evgeniy A. ; Galvita, Vladimir V. ; Alexopoulos, Konstantinos ; Meledina, Maria ; Ramachandran, Ranjith K. ; Dendooven, Jolien ; Detavernier, Christophe ; Van Tendeloo, Gustaaf ; Safonova, Olga V. ; Nachtegaal, Maarten ; Weckhuysen, Bert M. ; Marin, Guy B. / Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy. In: Angewandte Chemie - International Edition. 2018 ; Vol. 57, No. 38. pp. 12430-12434.

@article{608bef0eb4ea4cbe816f0fe210a56a5f,

title = "Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy",

abstract = "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.",

author = "Matthias Filez and Hilde Poelman and Redekop, {Evgeniy A.} and Galvita, {Vladimir V.} and Konstantinos Alexopoulos and Maria Meledina and Ramachandran, {Ranjith K.} and Jolien Dendooven and Christophe Detavernier and {Van Tendeloo}, Gustaaf and Safonova, {Olga V.} and Maarten Nachtegaal and Weckhuysen, {Bert M.} and Marin, {Guy B.}",

year = "2018",

month = sep,

day = "17",

doi = "10.1002/anie.201806447",

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Filez, M, Poelman, H, Redekop, EA, Galvita, VV, Alexopoulos, K, Meledina, M, Ramachandran, RK, Dendooven, J, Detavernier, C, Van Tendeloo, G, Safonova, OV, Nachtegaal, M, Weckhuysen, BM & Marin, GB 2018, 'Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy', Angewandte Chemie - International Edition, vol. 57, no. 38, pp. 12430-12434. https://doi.org/10.1002/anie.201806447

Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X-ray Absorption Spectroscopy. / Filez, Matthias; Poelman, Hilde; Redekop, Evgeniy A.; Galvita, Vladimir V.; Alexopoulos, Konstantinos; Meledina, Maria; Ramachandran, Ranjith K.; Dendooven, Jolien; Detavernier, Christophe; Van Tendeloo, Gustaaf; Safonova, Olga V.; Nachtegaal, Maarten; Weckhuysen, Bert M.; Marin, Guy B.

In: Angewandte Chemie - International Edition, Vol. 57, No. 38, 17.09.2018, p. 12430-12434.

Research output: Contribution to journal › Article › peer-review

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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.

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Y1 - 2018/9/17

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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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