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采用固体电解质电动势测量法原位监测Mg2V2O7催化剂的表面氧活度在丙烷氧化脱氧反应中的周期性振荡现象.直观地揭示了丙烷选择氧化反应中Mg2V2O7催化剂的先还原后氧化的过程.结果表明,丙烷选择氧化的控制步骤为丙烷在催化剂上的吸附和活化过程,且丙烷和氧气在催化剂上的吸附位不同,二者不存在竞争吸附.

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