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Strontium-Doped Lanthanum Cobaltite and Manganite: Highly Active Catalysts for Toluene Complete Oxidation / Deng Jiguang in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8175–8183 Titre : Strontium-Doped Lanthanum Cobaltite and Manganite: Highly Active Catalysts for Toluene Complete Oxidation Type de document : texte imprimé Auteurs : Deng Jiguang, Auteur ; Zhang, Lei, Auteur ; Hongxing Dai, Auteur Année de publication : 2008 Article en page(s) : p. 8175–8183 Note générale : Chemical engineering Langues : Anglais (eng) 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 [article] Strontium-Doped Lanthanum Cobaltite and Manganite: Highly Active Catalysts for Toluene Complete Oxidation [texte imprimé] / Deng Jiguang, Auteur ; Zhang, Lei, Auteur ; Hongxing Dai, Auteur . - 2008 . - p. 8175–8183. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8175–8183 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