Oxidative Dehydrogenation on Nanocarbon: Intrinsic Catalytic Activity and Structure–Function Relationships |
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| Authors: | Dr Wei Qi Wei Liu Xiaoling Guo Prof?Dr Robert Schlögl Prof?Dr Dangsheng Su |
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| Affiliation: | 1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 (China);2. Fritz Haber Institute of the Max Planck Society, 14195 Berlin (Germany);3. Max Planck Institute for Chemical Energy Conversion, 5470 Mülheim an der Ruhr (Germany) |
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| Abstract: | Physical and chemical insights into the nature and quantity of the active sites and the intrinsic catalytic activity of nanocarbon materials in alkane oxidative dehydrogenation (ODH) reactions are reported using a novel in situ chemical titration process. A study on the structure–function relationship reveals that the active sites are identical both in nature and function on various nanocarbon catalysts. Additionally, the quantity of the active sites could be used as a metric to normalize the reaction rates, and thus to evaluate the intrinsic activity of nanocarbon catalysts. The morphology of the nanocarbon catalysts at the microscopic scale exhibits a minor influence on their intrinsic ODH catalytic activity. The number of active sites calculated from the titration process indicates the number of catalytic centers that are active (that is, working) under the reaction conditions. |
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| Keywords: | active sites carbon materials heterogeneous catalysis kinetics oxidative dehydrogenation |
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