NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism
The NOx storage mechanism on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> 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 de...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/8/2133 |
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| author | Vicente Albaladejo-Fuentes María-Salvadora Sánchez-Adsuar James A. Anderson María-José Illán-Gómez |
| author_facet | Vicente Albaladejo-Fuentes María-Salvadora Sánchez-Adsuar James A. Anderson María-José Illán-Gómez |
| author_sort | Vicente Albaladejo-Fuentes |
| collection | DOAJ |
| description | The NOx storage mechanism on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> 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 Ba<sub>2</sub>TiO<sub>4</sub> plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O<sub>2</sub> and NO/N<sub>2</sub> 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 BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> 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 NO<sub>2</sub> generation and the nitrate formation. |
| first_indexed | 2024-03-10T08:31:34Z |
| format | Article |
| id | doaj.art-c8f32d93060143a2a8c2c54d7a67deea |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T08:31:34Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-c8f32d93060143a2a8c2c54d7a67deea2023-11-22T09:01:00ZengMDPI AGNanomaterials2079-49912021-08-01118213310.3390/nano11082133NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible MechanismVicente Albaladejo-Fuentes0María-Salvadora Sánchez-Adsuar1James A. Anderson2María-José Illán-Gómez3Carbon Materials and Environment Research Group, Department of Inorganic Chemistry, Faculty of Science, Universidad de Alicante San Vicente del Raspeig, 03690 Alicante, SpainCarbon Materials and Environment Research Group, Department of Inorganic Chemistry, Faculty of Science, Universidad de Alicante San Vicente del Raspeig, 03690 Alicante, SpainSurface Chemistry and Catalysis Group, School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UKCarbon Materials and Environment Research Group, Department of Inorganic Chemistry, Faculty of Science, Universidad de Alicante San Vicente del Raspeig, 03690 Alicante, SpainThe NOx storage mechanism on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> 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 Ba<sub>2</sub>TiO<sub>4</sub> plays a key role in the NOx storage process. In situ DRIFTS experiments under NO/O<sub>2</sub> and NO/N<sub>2</sub> 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 BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> 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 NO<sub>2</sub> generation and the nitrate formation.https://www.mdpi.com/2079-4991/11/8/2133NOx storage mechanismin situ DRIFTSnitritesnitratesbarium-titanium perovskite |
| spellingShingle | Vicente Albaladejo-Fuentes María-Salvadora Sánchez-Adsuar James A. Anderson María-José Illán-Gómez NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism Nanomaterials NOx storage mechanism in situ DRIFTS nitrites nitrates barium-titanium perovskite |
| title | NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism |
| title_full | NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism |
| title_fullStr | NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism |
| title_full_unstemmed | NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism |
| title_short | NOx Storage on BaTi<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3</sub> Perovskite Catalysts: Addressing a Feasible Mechanism |
| title_sort | nox storage on bati sub 0 8 sub cu sub 0 2 sub o sub 3 sub perovskite catalysts addressing a feasible mechanism |
| topic | NOx storage mechanism in situ DRIFTS nitrites nitrates barium-titanium perovskite |
| url | https://www.mdpi.com/2079-4991/11/8/2133 |
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