![]() These findings demonstrate the universality of the SMSI in oxide supported catalysts, which is of general importance for designing catalysts and understanding catalytic mechanisms. The SMSI in the Pt–SiO 2 system was found to remarkably boost the catalytic hydrogenation. The metastable crystalline SiO 2 overlayer subsequently underwent an order-to-disorder transition due to the continuous dissociation of SiO 2 and the interfacial alloying of Si with the underlying Co. In a Co/SiO 2 system, the amorphous SiO 2 migrated onto the Co surface to form a crystallized quartz-SiO 2 overlayer, and simultaneously an interlayer of Si was generated in-between. Here we revealed at the atomic scale the interfacial reaction induced SMSI in silica supported Co and Pt catalysts under reductive conditions at high temperature using aberration-corrected environmental transmission electron microscopy coupled with in situ electron energy loss spectroscopy. The strong metal–support interaction (SMSI), which has been widely observed in metal oxide supported catalysts and significantly affects the catalytic behavior, has been speculated to rarely happen in silica supported catalysts since silica is hard to reduce. Silica supported metal catalysts are most widely used in the modern chemical industry because of the high stability and tunable reactivity. E-mail: e Core Research Facilities, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China f State Key Laboratory of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China E-mail: d Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China. E-mail: b Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China c Beijing Advanced Innovation Center for Materials Genome Engineering, Center for Green Innovation, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China. ![]() * a a Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. Sci., 2021, 12, 12651-12660 Atomic origins of the strong metal–support interaction in silica supported catalysts † ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |