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应用ＢＥＴ、气相色谱、红外光谱、竞争加氢反应和ＸＰＳ等方法，在以前工作的基础上继续考察了Ｙ２Ｏ３、Ｓｍ２Ｏ３、Ｅｕ２Ｏ３、Ｇｄ２Ｏ３、Ｔｂ４Ｏ７、Ｄｙ２Ｏ３、Ｅｒ２Ｏ３、Ｔｍ２Ｏ３、Ｙｂ２Ｏ３作为添加剂，对镍在γ－Ａｌ２Ｏ３表面的分散度、甲烷化活性、ＣＯ在镍上的吸附态及表面镍原子的电子状态的影响．结果表明，稀土氧化物添加剂不仅明显地提高了金属镍的分散度和甲烷化活性，还直接地影响表面镍原子的电子状态．对不同稀土氧化物，这些效应各异．作者认为，利用稀土氧化物添加剂调节表面镍原子的电子状态，可能成为改进甲烷化催化剂活性的一个有效途径．
Sm2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Er2O3, Tm2O3 and Yb2O3 were investigated continuously on the basis of previous work based on the methods of BET, GC, IR, competitive hydrogenation and XPS. the dispersion of γ-Al2O3, the methanation activity, the adsorption state of CO on nickel and the electronic state of the surface nickel atom. The results show that the rare earth oxide additive not only obviously improves the dispersivity and methanation activity of nickel metal, but also directly affects the electronic state of nickel atoms on the surface. For different rare earth oxides, these effects vary. The author believes that the use of rare earth oxide additives to adjust the surface nickel atom electronic state may be an effective way to improve the activity of methanation catalyst.