负载型氧化钒催化剂中表面钒过氧-氧伞型结构的存在：事实还是虚构？
Presence of surface vanadium peroxo-oxo umbrella structures in supported vanadium oxide catalysts: fact or fiction?
机构信息
Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
出版信息
J Am Chem Soc. 2010 Sep 15;132(36):12559-61. doi: 10.1021/ja105392g.
Recent debates over the active site structure of supported vanadia/silica catalysts have suggested the existence of a surface vanadium peroxo-oxo "umbrella" structure. This study definitively demonstrates with Raman and UV-vis spectroscopy that the surface vanadia peroxo-oxo umbrella-like structure is not present for both hydrated and dehydrated supported vanadia catalysts such as supported vanadia on silica. The vanadia peroxo-oxo umbrella structure, however, is present in vanadium haloperoxidase (VHPOs) enzymes and metal-organic compounds designed to mimic VHPOs.
最近关于负载型氧化钒/二氧化硅催化剂活性位结构的争论表明，存在表面钒过氧-氧“伞”状结构。本研究通过拉曼和紫外可见光谱明确证明，水合和脱水的负载型氧化钒催化剂（如负载在二氧化硅上的氧化钒）表面不存在氧化钒过氧-氧伞状结构。然而，该过氧-氧伞状结构存在于钒卤过氧化物酶（VHPOs）酶和设计用于模拟 VHPOs 的金属有机化合物中。
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