Crystalline M?3V0x. Its Unique Structural Property and High Catalytic Performance in Alkane Selective Oxidation

摘要

A new crystalline MojVOx was synthesized by hydrothermal method for the first time. The crystal structure of this material was analyzed by Rietveld method with its XRD pattern to be orthorhombic, where pentagonal units, [MO6O21]6", link together with VO2+ linkers along with the formations of hexagonal ring unit and heptagonal ring unit in a layer sheet of octahedra. The centers of the hexagonal ring and the heptagonal ring are left open and the size of the open space of the heptagonal ring is large enough for Ar and N2 adsorption. This material showed extremely high catalytic performance in ethane selective oxidation to ethene and acetic acid, The origin of the high catalytic oxidation activity was discussed on the basis of the structure.