In order to obtain appropriate activity of catalyst and increase the load, cesium is mixed in catalyst production, cesium could influence the oxidation-reductibility ability of vanadium.

• 为了保证催化剂有适当的活性和较高的选择性，在催化剂制备过程中添加了碱金属铯，铯会影响钒的氧化-还原性。