Citation: Daniel Widmann, R. Jürgen Behm. Formation and removal of active oxygen species for the non-catalytic CO oxidation on Au/TiO₂ catalysts[J]. Chinese Journal of Catalysis, ;2016, 37(10): 1684-1693. doi: 10.1016/S1872-2067(16)62452-X shu

Formation and removal of active oxygen species for the non-catalytic CO oxidation on Au/TiO₂ catalysts

Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany

Received Date: 15 April 2016
Revised Date: 6 May 2016

Applying quantitative temporal analysis of products reactor measurements, we studied the reactive removal of active oxygen present on Au/TiO₂ catalysts after calcination at elevated temperatures (400℃) by CO pulses and its replenishment by O₂ pulses at 80℃, focusing on the nature of the active oxygen species. In contrast to previous studies, which mainly focused on and clarified the nature of the active oxygen species for the catalytic CO oxidation, which is reversibly formed and replenished under typical reaction conditions, this study demonstrates that directly after calcination an additional oxygen species is present. This species is also active for the CO oxidation, but it is not or only very little formed under typical reaction conditions. Implications of these results on the mechanistic understanding of the CO oxidation on Au/TiO₂, in particular on the role of different active oxygen species, will be discussed.
- Titanium dioxide,
- Gold catalysis,
- Carbon monoxide oxidation,
- Reaction mechanism,
- Active oxygen,
- Temporal analysis of products
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沈阳化工大学材料科学与工程学院沈阳 110142

Formation and removal of active oxygen species for the non-catalytic CO oxidation on Au/TiO2 catalysts

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通讯作者: 陈斌, bchen63@163.com

Formation and removal of active oxygen species for the non-catalytic CO oxidation on Au/TiO₂ catalysts