It is mainly because the layered structure of BaAl2C>4 effectively partitions vanadium layer on the surface, reduces its aggregate state and improves the C3H6 selectivity of the catalyst.

• 对催化剂的结构研究表明，BaAl_2O_4的层状结构有利于分隔表面的钒氧化物，降低2 丙烷氧化脱氢反应制丙烯的研究其聚合度，从而提高了催化剂的丙烯选择性。