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用ＸＰＳ，ＣＯ２－ＴＰＤ及ＣＯ与ＣＨ４的恒温脉冲反应技术，深入研究加压失活ＭｇＯ／ＢａＣＯ３催化剂表面结构变化对其催化性能的影响．结果表明，加压失活催化剂表面活性氧物种Ｏ２－２离子浓度大大降低；表面晶格氧的流动性及晶格氧参与甲烷转化的能力都大大减弱；由于加压失活催化剂表面结构发生变化，ＭｇＯ和ＢａＣＯ３共同作用形成的强碱中心消失．
The influence of the surface structure of MgO / BaCO3 catalyst under pressure on the catalytic performance was investigated by XPS, CO2-TPD and constant temperature pulse reaction between CO and CH4. The results show that the O2-2 ion concentration of the surface active oxygen species in the catalyst under pressure is significantly reduced; the mobility of lattice oxygen on the surface and the ability of lattice oxygen to participate in methane conversion are greatly weakened; and the surface structure of the catalyst is changed due to the pressure deactivation , MgO and BaCO3 formed by the strong alkali disappeared.