Reaction of oxygen with adsorbed hydrogen species of a reduced Pt/TiO2 catalyst |
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| Authors: | Xin Sheng Li Yan Xin Chen and Wen Zhao Li |
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| Institution: | (1) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China |
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| Abstract: | Reaction of oxygen with the adsorbed hydrogen species of Pt/TiO2 catalysts reduced in the temperature range of RT-773 K has been studied by temperature-programmed oxidation (TPO). It is obtained that the Pt-assisted reaction of oxygen with both the surface hydroxy groups and titanium hydride species occurs in the temperature range of 320–450 K; direct oxidation of the surface hydrogen species takes place on the surface of TiO2 in the temperature range of 500–600 K; and oxygen reacts with the stored hydrogen species in the sublayer and bulk of the TiO2 support when the temperature was increased to above 600 K. |
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| Keywords: | Adsorbed hydrogen reduced Pt/TiO2 catalyst TPO |
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