Brownmillerites CaFeO2.5 and SrFeO2.5 as Catalyst Support for CO Oxidation

The support material can play an important role in oxidation catalysis, notably for CO oxidation. Here, we study two materials of the Brownmillerite family, CaFeO2.5 and SrFeO2.5, as one example of a stoichiometric phase (CaFeO2.5,...

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Autores principales:	Pierre-Alexis Répécaud, Monica Ceretti, Mimoun Aouine, Céline Delwaulle, Emmanuel Nonnet, Werner Paulus, Helena Kaper
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	oxygen mobility CO oxidation support interaction phase stability heterogeneous catalysis Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/8d32ab6880034d258aa30879b0535072
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spelling	oai:doaj.org-article:8d32ab6880034d258aa30879b05350722021-11-11T18:25:52ZBrownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation10.3390/molecules262164131420-3049https://doaj.org/article/8d32ab6880034d258aa30879b05350722021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6413https://doaj.org/toc/1420-3049The support material can play an important role in oxidation catalysis, notably for CO oxidation. Here, we study two materials of the Brownmillerite family, CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub>, as one example of a stoichiometric phase (CaFeO<sub>2.5,</sub> CFO) and one existing in different modifications (SrFeO<sub>2.75</sub>, SrFeO<sub>2.875</sub> and SrFeO<sub>3</sub>, SFO). The two materials are synthesized using two synthesis methods, one bottom-up approach via a complexation route and one top-down method (electric arc fusion), allowing to study the impact of the specific surface area on the oxygen mobility and catalytic performance. CO oxidation on <sup>18</sup>O-exchanged materials shows that oxygen from SFO participates in the reaction as soon as the reaction starts, while for CFO, this onset takes place 185 °C after reaction onset. This indicates that the structure of the support material has an impact on the catalytic performance. We report here on significant differences in the catalytic activity linked to long-term stability of CFO and SFO, which is an important parameter not only for possible applications, but equally to better understand the mechanism of the catalytic activity itself.Pierre-Alexis RépécaudMonica CerettiMimoun AouineCéline DelwaulleEmmanuel NonnetWerner PaulusHelena KaperMDPI AGarticleoxygen mobilityCO oxidationsupport interactionphase stabilityheterogeneous catalysisOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6413, p 6413 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	oxygen mobility CO oxidation support interaction phase stability heterogeneous catalysis Organic chemistry QD241-441
spellingShingle	oxygen mobility CO oxidation support interaction phase stability heterogeneous catalysis Organic chemistry QD241-441 Pierre-Alexis Répécaud Monica Ceretti Mimoun Aouine Céline Delwaulle Emmanuel Nonnet Werner Paulus Helena Kaper Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
description	The support material can play an important role in oxidation catalysis, notably for CO oxidation. Here, we study two materials of the Brownmillerite family, CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub>, as one example of a stoichiometric phase (CaFeO<sub>2.5,</sub> CFO) and one existing in different modifications (SrFeO<sub>2.75</sub>, SrFeO<sub>2.875</sub> and SrFeO<sub>3</sub>, SFO). The two materials are synthesized using two synthesis methods, one bottom-up approach via a complexation route and one top-down method (electric arc fusion), allowing to study the impact of the specific surface area on the oxygen mobility and catalytic performance. CO oxidation on <sup>18</sup>O-exchanged materials shows that oxygen from SFO participates in the reaction as soon as the reaction starts, while for CFO, this onset takes place 185 °C after reaction onset. This indicates that the structure of the support material has an impact on the catalytic performance. We report here on significant differences in the catalytic activity linked to long-term stability of CFO and SFO, which is an important parameter not only for possible applications, but equally to better understand the mechanism of the catalytic activity itself.
format	article
author	Pierre-Alexis Répécaud Monica Ceretti Mimoun Aouine Céline Delwaulle Emmanuel Nonnet Werner Paulus Helena Kaper
author_facet	Pierre-Alexis Répécaud Monica Ceretti Mimoun Aouine Céline Delwaulle Emmanuel Nonnet Werner Paulus Helena Kaper
author_sort	Pierre-Alexis Répécaud
title	Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
title_short	Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
title_full	Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
title_fullStr	Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
title_full_unstemmed	Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation
title_sort	brownmillerites cafeo<sub>2.5</sub> and srfeo<sub>2.5</sub> as catalyst support for co oxidation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8d32ab6880034d258aa30879b0535072
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Brownmillerites CaFeO<sub>2.5</sub> and SrFeO<sub>2.5</sub> as Catalyst Support for CO Oxidation

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