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Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free

[Image: see text] Hard X-ray absorption spectroscopy (XAS) is frequently applied in catalysis and gas sorption studies to monitor changes in oxidation states, coordination numbers, and interatomic distances of active sites under in situ and operando conditions. However, transmission XAS data can rev...

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Autores principales: Lomachenko, Kirill A., Molokova, Anastasia Yu., Atzori, Cesare, Mathon, Olivier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9490794/
https://www.ncbi.nlm.nih.gov/pubmed/36157514
http://dx.doi.org/10.1021/acs.jpcc.2c00226
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author Lomachenko, Kirill A.
Molokova, Anastasia Yu.
Atzori, Cesare
Mathon, Olivier
author_facet Lomachenko, Kirill A.
Molokova, Anastasia Yu.
Atzori, Cesare
Mathon, Olivier
author_sort Lomachenko, Kirill A.
collection PubMed
description [Image: see text] Hard X-ray absorption spectroscopy (XAS) is frequently applied in catalysis and gas sorption studies to monitor changes in oxidation states, coordination numbers, and interatomic distances of active sites under in situ and operando conditions. However, transmission XAS data can reveal also the change in the total amount of guest species adsorbed on the whole sample. Surprisingly, to the best of our knowledge, the latter property has never been exploited. Here, we present a simple method to quantify the amount of adsorbates from XAS data collected during the interaction of the sample with gases or liquids. The method relies on monitoring the change of the total absorption level below the measured absorption edge and does not require any additional instrumentation or modification of the XAS data collection procedure. Essentially, it is a way to obtain the information analogous to the one delivered by temperature-programmed reduction (TPR), temperature-programmed desorption (TPD), or thermogravimetric analysis (TGA) directly from XAS at no extra cost.
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spelling pubmed-94907942022-09-22 Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free Lomachenko, Kirill A. Molokova, Anastasia Yu. Atzori, Cesare Mathon, Olivier J Phys Chem C Nanomater Interfaces [Image: see text] Hard X-ray absorption spectroscopy (XAS) is frequently applied in catalysis and gas sorption studies to monitor changes in oxidation states, coordination numbers, and interatomic distances of active sites under in situ and operando conditions. However, transmission XAS data can reveal also the change in the total amount of guest species adsorbed on the whole sample. Surprisingly, to the best of our knowledge, the latter property has never been exploited. Here, we present a simple method to quantify the amount of adsorbates from XAS data collected during the interaction of the sample with gases or liquids. The method relies on monitoring the change of the total absorption level below the measured absorption edge and does not require any additional instrumentation or modification of the XAS data collection procedure. Essentially, it is a way to obtain the information analogous to the one delivered by temperature-programmed reduction (TPR), temperature-programmed desorption (TPD), or thermogravimetric analysis (TGA) directly from XAS at no extra cost. American Chemical Society 2022-03-14 2022-03-24 /pmc/articles/PMC9490794/ /pubmed/36157514 http://dx.doi.org/10.1021/acs.jpcc.2c00226 Text en © 2022 American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Lomachenko, Kirill A.
Molokova, Anastasia Yu.
Atzori, Cesare
Mathon, Olivier
Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title_full Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title_fullStr Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title_full_unstemmed Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title_short Quantification of Adsorbates by X-ray Absorption Spectroscopy: Getting TGA-like Information for Free
title_sort quantification of adsorbates by x-ray absorption spectroscopy: getting tga-like information for free
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9490794/
https://www.ncbi.nlm.nih.gov/pubmed/36157514
http://dx.doi.org/10.1021/acs.jpcc.2c00226
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