NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism
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Título: | NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism |
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Autor/es: | Albaladejo-Fuentes, Vicente | Sánchez-Adsuar, María Salvadora | Anderson, James A. | Illán-Gómez, María José |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | NOx storage mechanism | In situ DRIFTS | Nitrites | Nitrates | Barium-titanium perovskite |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 21-ago-2021 |
Editor: | MDPI |
Cita bibliográfica: | Albaladejo-Fuentes V, Sánchez-Adsuar M-S, Anderson JA, Illán-Gómez M-J. NOx Storage on BaTi0.8Cu0.2O3 Perovskite Catalysts: Addressing a Feasible Mechanism. Nanomaterials. 2021; 11(8):2133. https://doi.org/10.3390/nano11082133 |
Resumen: | The NOx storage mechanism on BaTi0.8Cu0.2O3 catalyst were studied using different techniques. The results obtained by XRD, ATR, TGA and XPS under NOx storage–regeneration conditions revealed that BaO generated on the catalyst by decomposition of Ba2TiO4 plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O2 and NO/N2 show that nitrites and nitrates are formed on the perovskite during the NOx storage process. Thus, it seems that, as for model NSR catalysts, the NOx storage on BaTi0.8Cu0.2O3 catalyst takes place by both “nitrite” and “nitrate” routes, with the main pathway being highly dependent on the temperature and the time on stream: (i) at T < 350 °C, NO adsorption leads to nitrites formation on the catalyst and (ii) at T > 350 °C, the catalyst activity for NO oxidation promotes NO2 generation and the nitrate formation. |
Patrocinador/es: | This research was funded by Generalitat Valenciana (PROMETEO/2018/076 and Spanish Government (PID2019-105542RB-I00) and EU (FEDER Founding). |
URI: | http://hdl.handle.net/10045/117305 |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano11082133 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/nano11082133 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas |
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