从活性试验、比表面测定、结构分析、还原度测定及程序升温还原等多方面考察了 Sb—Mo二元氧化物体系与单独氧化物 MoO_3、Sb_2O_4的特性,认为与单独氧化物相比,在标题反应中 Sb-Mo二元氧化物的高活性与其比表面的增大有关,乙酸乙酯选择性的提高是由于在反应气氛下催化剂内生成了新的活性相。显示出较高氧化酯化选择性的工作状态,催化剂处于某种程度被还原的状态。这种状态下的催化剂体相氧比较活泼。 The properties of Sb-Mo binary oxide system and single oxide MoO_3 and Sb_2O_4 were investigated from the aspects of activity test, specific surface area measurement, structure analysis, determination of reduction degree and temperature-programmed reduction. It is concluded that compared with single oxide, The high activity of the Sb-Mo binary oxide in the title reaction is related to its increased specific surface area, and the increase in ethyl acetate selectivity is due to the formation of a new active phase within the catalyst in the reaction atmosphere. Shows a higher oxidative esterification selectivity of the working state, the catalyst is in a state of being reduced. The catalyst phase oxygen in this state is more lively.