Promotional nature of Sn on Pt/CeO2 for the oxidative dehydrogenation of propane with carbon dioxide
نویسندگان
چکیده
The oxidative dehydrogenation of propane with CO2 (CO2-ODP) is a promising technology for the efficient production propene in tandem reduction to CO. However, rational design high-performance catalysts this green process still challenged by limited understanding nature active sites and reaction mechanism. In work, effects SnO2 promoter on Pt/CeO2 activity selectivity CO2-ODP are elucidated through varying Sn/Pt molar ratio. When ratio increases, conversion gradually decreases, while increases. These dependences explained increasing electron density Pt promoter. strength effect determined Owing electronic changes Pt, becomes more favorable than undesired reforming propane. Sn-modified Pt—O—Ce bonds reasonably revealed as occurring redox mechanism involving activation over oxygen vacancies at CeO2 boundaries. atomic-scale understandings important guidelines purposeful development Pt-based CO2-ODP.
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ژورنال
عنوان ژورنال: Nano Research
سال: 2023
ISSN: ['1998-0000', '1998-0124']
DOI: https://doi.org/10.1007/s12274-022-5316-0