Oxidation Catalysis of Crystalline Mo₃VO_x for the Selective Oxidation of Ethane

Abstract

Oxidative dehydrogenation of ethane (ODHE) is an essential reaction in modern society to produce ethylene. The orthorhombic Mo 3 VO x catalyst (MoVO) was reported as one of the best catalysts for this reaction after a particular redox treatment to generate lattice oxygen defects. This study elucidates the location and nature of the defect sites as well as how molecular oxygen is activated toward the ODHE. The insights into the active site formation and guidelines for its design were gained through structural characterization, quantification of oxygen defects, and experimental and theoretical investigation of the reaction mechanisms. Peroxo formed at the defect sites of the bridging oxygen facing the heptagonal channel was found to drive the reaction efficiently.

Microporosity and Catalytic Activity for Hydrodesulfurization of Pharmacosiderite Mo4P3O16 Synthesized at a Moderate Temperature

“…At that time, the O–H distance between NH 4 + and CO 2 was reasonable and was 2.53–2.78 Å after the geometry optimization, and the adsorption energy of E CO2 = −62 kJ mol –1 CO2 was obtained (Figure d). There are a few examples of microporous materials composed of transition-metal elements in an all-inorganic manner. − These properties could offer versatile applications due to the microporous structure and redox properties.…”

“…Recently, a new class of microporous materials composed of d-block elements, namely, zeolitic octahedral metal oxides (ZOMOs), has been reported, and applications derived from their redox-active constituents and microporosity are being developed. However, ZOMOs are still rare, although much effort has been devoted to their synthesis. − …”