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Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography
The synthesis of hierarchically porous materials usually requires complex experimental procedures, often based around extensive trial and error approaches. One common synthesis strategy is the sol–gel method, although the relation between synthesis parameters, material structure and function has not...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8922122/ https://www.ncbi.nlm.nih.gov/pubmed/35289133 http://dx.doi.org/10.1002/advs.202105432 |
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author | Weber, Sebastian Diaz, Ana Holler, Mirko Schropp, Andreas Lyubomirskiy, Mikhail Abel, Ken L. Kahnt, Maik Jeromin, Arno Kulkarni, Satishkumar Keller, Thomas F. Gläser, Roger Sheppard, Thomas L. |
author_facet | Weber, Sebastian Diaz, Ana Holler, Mirko Schropp, Andreas Lyubomirskiy, Mikhail Abel, Ken L. Kahnt, Maik Jeromin, Arno Kulkarni, Satishkumar Keller, Thomas F. Gläser, Roger Sheppard, Thomas L. |
author_sort | Weber, Sebastian |
collection | PubMed |
description | The synthesis of hierarchically porous materials usually requires complex experimental procedures, often based around extensive trial and error approaches. One common synthesis strategy is the sol–gel method, although the relation between synthesis parameters, material structure and function has not been widely explored. Here, in situ 2D hard X‐ray ptychography (XRP) and 3D ptychographic X‐ray computed tomography (PXCT) are applied to monitor the development of hierarchical porosity in Ni/Al(2)O(3) and Al(2)O(3) catalysts with connected meso‐ and macropore networks. In situ XRP allows to follow textural changes of a dried gel Ni/Al(2)O(3) sample as a function of temperature during calcination, activation and CO(2) methanation reaction. Complementary PXCT studies on dried gel particles of Ni/Al(2)O(3) and Al(2)O(3) provide quantitative information on pore structure, size distribution, and shape with 3D spatial resolution approaching 50 nm, while identical particles are imaged ex situ before and after calcination. The X‐ray imaging results are correlated with N(2)‐sorption, Hg porosimetry and He pycnometry pore characterization. Hard X‐ray nanotomography is highlighted to derive fine structural details including tortuosity, branching nodes, and closed pores, which are relevant in understanding transport phenomena during chemical reactions. XRP and PXCT are enabling technologies to understand complex synthesis pathways of porous materials. |
format | Online Article Text |
id | pubmed-8922122 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-89221222022-03-21 Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography Weber, Sebastian Diaz, Ana Holler, Mirko Schropp, Andreas Lyubomirskiy, Mikhail Abel, Ken L. Kahnt, Maik Jeromin, Arno Kulkarni, Satishkumar Keller, Thomas F. Gläser, Roger Sheppard, Thomas L. Adv Sci (Weinh) Research Articles The synthesis of hierarchically porous materials usually requires complex experimental procedures, often based around extensive trial and error approaches. One common synthesis strategy is the sol–gel method, although the relation between synthesis parameters, material structure and function has not been widely explored. Here, in situ 2D hard X‐ray ptychography (XRP) and 3D ptychographic X‐ray computed tomography (PXCT) are applied to monitor the development of hierarchical porosity in Ni/Al(2)O(3) and Al(2)O(3) catalysts with connected meso‐ and macropore networks. In situ XRP allows to follow textural changes of a dried gel Ni/Al(2)O(3) sample as a function of temperature during calcination, activation and CO(2) methanation reaction. Complementary PXCT studies on dried gel particles of Ni/Al(2)O(3) and Al(2)O(3) provide quantitative information on pore structure, size distribution, and shape with 3D spatial resolution approaching 50 nm, while identical particles are imaged ex situ before and after calcination. The X‐ray imaging results are correlated with N(2)‐sorption, Hg porosimetry and He pycnometry pore characterization. Hard X‐ray nanotomography is highlighted to derive fine structural details including tortuosity, branching nodes, and closed pores, which are relevant in understanding transport phenomena during chemical reactions. XRP and PXCT are enabling technologies to understand complex synthesis pathways of porous materials. John Wiley and Sons Inc. 2022-01-20 /pmc/articles/PMC8922122/ /pubmed/35289133 http://dx.doi.org/10.1002/advs.202105432 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Weber, Sebastian Diaz, Ana Holler, Mirko Schropp, Andreas Lyubomirskiy, Mikhail Abel, Ken L. Kahnt, Maik Jeromin, Arno Kulkarni, Satishkumar Keller, Thomas F. Gläser, Roger Sheppard, Thomas L. Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title | Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title_full | Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title_fullStr | Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title_full_unstemmed | Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title_short | Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychography |
title_sort | evolution of hierarchically porous nickel alumina catalysts studied by x‐ray ptychography |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8922122/ https://www.ncbi.nlm.nih.gov/pubmed/35289133 http://dx.doi.org/10.1002/advs.202105432 |
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