Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/F28A244A-BEE7-476D-8536-455470094415 | ||
| Year | 1993 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | D. Papageorgiou, D. Vamvouka and X. E. Verykios, "Oxidative coupling of methane to C2 hydrocarbons over doped titania catalysts", Stud. Surf. Sci. Catal., vol. 75, pp. 2269-2272, 1993. doi:10.1016/S0167-2991(08)64277-9 https://doi.org/10.1016/S0167-2991(08)64277-9 | ||
| Appears in Collections |
The performance of altervalent doped TiO2 catalysts under oxidative coupling of methane conditions is investigated. It is shown that higher-valence doping (W6+, Nb5+, Ta5+) of TiO2 enhances significantly methane conversion activity and reduces selectivity to nearly zero levels. On the other hand, doping TiO2 with lower valence cations (Li+, Zn+2) has a small influence on activity but results in a significant enhancement of selectivity. These results are attributed to alterations of the bulk electronic structure of the semiconductivity catalysts as well as to alterations of surface parameters such as acidity/basicity characteristics, oxygen ion mobility and lattice oxygen reactivity.
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