Reducibility of Mo species in Pt/MoO3 and PtMo/Al2O3 catalysis |
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| Authors: | Jun Wang Wenzhao Li Chunying Yu Yanxin Chen and Yingzhen Zhang |
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| Institution: | (1) Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, P.R. China |
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| Abstract: | Recucibility of Mo species in Pt/MoO3 and PtMo/Al2O3 has been investigated by temperature-programmed reduction (TPR), temperature-programmed desorption of hydrogen (H2-TPD) and temperature programmed electronic conductivity (TPEC) techniques. In Pt/MoO3 at H2 atmosphere, it was found by TPEC and TPR that, a slight amount of Pt could activate the transfer of the species and H atoms
between H2 and MoO3, and thus accelerate the reduction of MoO3. In PtMo/Al2O3, TPR and H2-TPD revealed that the reduction of surface Mo species could also be facilitated by Pt. Two kinds of hydrogen molybdenum species
were proposed on the surface of the catalyst after prereduction. |
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| Keywords: | TPR H2-TPD semiconductivity PtMo/Al2O3 |
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