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应用XPS技术,对添加了3wt％第二组分金属氧化物M_xO_y(ZnO,La_2O_3,SnO_2,V_2O_5与Re_2O_7)的MoO_3/γ-Al_2O_3催化剂(MoO_3的浓度为12wt％)的氢还原行为进行了考察,样品的氢还原在电子能谱仪的样品预处理室进行,然后不暴露于大气直接进入能谱分析腔进行XPS测定。同时对第二组分金属氧化物的金属氧化价态也作了相应的XPS测定。结果表明,第二组分的引入,可显著地影响MoO_3/γ-Al_2O_3上MoO_3之氢还原行为,而且不同第二组分与MoO_3及担体的相互作用也有明显差别。
The hydrogen reduction behavior of MoO 3 / γ-Al 2 O 3 catalyst (concentration of MoO 3: 12 wt%) with addition of 3wt% M_xO_y (ZnO, La_2O_3, SnO_2, V_2O_5 and Re_2O_7) , The hydrogen reduction of the sample was carried out in the sample pretreatment chamber of the electron spectrometer and then directly into the energy spectrum analysis chamber for XPS measurement without being exposed to the atmosphere. At the same time, the metal oxidation state of the second component metal oxide was also made corresponding XPS determination. The results show that the introduction of the second component can significantly affect the hydrogen reduction of MoO_3 on MoO_3 / γ-Al_2O_3, and the interaction between the second component and MoO_3 and the support also have significant differences.