| Titre : | Strontium-Doped Lanthanum Cobaltite and Manganite: Highly Active Catalysts for Toluene Complete Oxidation (2008) |
| Auteurs : | Deng Jiguang, Auteur ; Lei Zhang, Auteur ; Hongxing Dai, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 n°21, Novembre 2008) |
| Article en page(s) : | p. 8175–8183 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Résumé : | La1−xSrxMO3−δ (M = Co, Mn; x = 0, 0.4) catalysts have been fabricated via a strategy of citric acid complexing and hydrothermal treatment. The oxidation of toluene was used as a probe reaction for the evaluation of catalytic performance. The materials were characterized by a number of techniques. We observed that the catalytic activity (evaluated by the temperature required for 80% conversion of toluene, T80%) increased in the sequence of LaMnO3.10 (T80% = 295 °C) < LaCoO2.89 (T80% = 246 °C) < La0.6Sr0.4MnO3.03 (T80% = 233 °C) < La0.6Sr0.4CoO2.76 (T80% = 219 °C) at toluene/O2 molar ratio = 1/400 and space velocity = 20 000 h−1. Moreover, CO2 and H2O were the only products for toluene oxidation over the catalysts. It is concluded that factors such as enriched structural defects (oxygen vacancies) and good Mn4+/Mn3+ or Co3+/Co2+ redox ability are responsible for the excellent catalytic performance of the La1−xSrxMO3−δ nanomaterials. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie800585x |
