Cargando…
Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy
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 O(2)–H(2) redox cycling was app...
Autores principales: | , , , , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6175175/ https://www.ncbi.nlm.nih.gov/pubmed/30067303 http://dx.doi.org/10.1002/anie.201806447 |
_version_ | 1783361443263938560 |
---|---|
author | 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. |
author_facet | 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. |
author_sort | Filez, Matthias |
collection | PubMed |
description | 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 O(2)–H(2) redox cycling was applied to mimic the lifetime changes in model Pt(13)In(9) 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 Pt(13)In(9) 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. |
format | Online Article Text |
id | pubmed-6175175 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-61751752018-10-15 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. Angew Chem Int Ed Engl Communications 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 O(2)–H(2) redox cycling was applied to mimic the lifetime changes in model Pt(13)In(9) 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 Pt(13)In(9) 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. John Wiley and Sons Inc. 2018-08-28 2018-09-17 /pmc/articles/PMC6175175/ /pubmed/30067303 http://dx.doi.org/10.1002/anie.201806447 Text en © 2018 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Communications 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 |
title | Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy |
title_full | Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy |
title_fullStr | Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy |
title_full_unstemmed | Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy |
title_short | Kinetics of Lifetime Changes in Bimetallic Nanocatalysts Revealed by Quick X‐ray Absorption Spectroscopy |
title_sort | kinetics of lifetime changes in bimetallic nanocatalysts revealed by quick x‐ray absorption spectroscopy |
topic | Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6175175/ https://www.ncbi.nlm.nih.gov/pubmed/30067303 http://dx.doi.org/10.1002/anie.201806447 |
work_keys_str_mv | AT filezmatthias kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT poelmanhilde kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT redekopevgeniya kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT galvitavladimirv kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT alexopouloskonstantinos kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT meledinamaria kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT ramachandranranjithk kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT dendoovenjolien kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT detavernierchristophe kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT vantendeloogustaaf kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT safonovaolgav kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT nachtegaalmaarten kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT weckhuysenbertm kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy AT maringuyb kineticsoflifetimechangesinbimetallicnanocatalystsrevealedbyquickxrayabsorptionspectroscopy |