Surface States and Oxidation Activities of MnOx TiO2 Catalysts

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (4): 555.

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Surface States and Oxidation Activities of MnO_x TiO₂ Catalysts

ZHENG Bai-Cun, WANG Ren, ZHOU Jing-Hong

Research Institute of Catalysis, East China University of Chemical Technology, Shanghai, 200237

Received:1992-08-26 Revised:1992-12-14 Online:1993-04-24 Published:1993-04-24

Abstract

Abstract: The surface states and COoxidation activities of MnO₂/TiO₂ catalysts with various loading amount were studied in this paper.The results show that manganese oxide was Mn₂O₃ when the loading amount of MnO₂/TiO₂ was Lower than 5.7 wt%, while the loading amount was more than 5.7 wt%, MnO₂ existed in the form of Mn₂O₃ and MnO₂. The threshold of Mn₂O₃ from the dispersed states to crystalline phase on TiO₂ was 0.028 g Mn₂O₃/100 m².The activities of catalysts were relative to their surface states,and the co-existence of Mn³⁺ and Mn⁴⁺ were contributive to increase the activities.

Key words: Manganese oxide, Titania, Dispersion state, Valence state distribution, Oxidation activity

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ZHENG Bai-Cun, WANG Ren, ZHOU Jing-Hong . Surface States and Oxidation Activities of MnO_x TiO₂ Catalysts[J]. Chem. J. Chinese Universities, 1993, 14(4): 555.

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Surface States and Oxidation Activities of MnO_x TiO₂ Catalysts

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