A series of MoVTeNbO_x-mixed metal oxides were synthesized by high-pressure hydrothermal method. The effects of temperature and time during the preparation process on the structure and catalytic performance of MoVTeNbO_x were investigated. It was demonstrated that high content of M1 phase (94.5%) MoVTeNbO_x with typical needle-shape morphology and high surface abundance of V⁵⁺ (68.9%) could be fabricated by high-pressure hydrothermal method in a short time (30–60 min) without hydrogen peroxide post-treatment. The catalytic results of propane selective oxidation showed that the MoVTeNbO_x sample synthesized at 200 °C for 30 min possessed the highest surface V⁵⁺ abundance and largest proportion of terminating (001) plane, displaying the highest selectivity (74.1%) for acrylic acid. Moreover, the prepared MoVTeNbO_x showed excellent stability in high temperature continuous reaction.

采用高压水热法合成了一系列MoVTeNbO _x混合金属氧化物。研究了制备过程中温度和时间对MoVTeNbO _x结构和催化性能的影响。已经证实，M1相（94.5％）的高含量MoVTeNbO _X与典型针状形态学和V的高丰度表面⁵⁺（68.9％）可通过高压水热法在短时间内制造（30-60 min) 没有过氧化氢后处理。丙烷选择性氧化的催化结果表明，在 200 °C 下合成 30 min的 MoVTeNbO _x样品具有最高的表面 V ⁵⁺端（001）平面的丰度和最大比例，对丙烯酸显示出最高的选择性（74.1%）。此外，制备的MoVTeNbO _x在高温连续反应中表现出优异的稳定性。