ＣＯ与Ｃｓ在Ｒｕ（１０１－０）表面上共吸附的高分辨电子能量损失谱研究结果表明：ＣＯ在有Ｃｓ覆盖的Ｒｕ（１０１－０）表面上有两种吸附状态，除了与ＣＯ在清洁表面上相似的一种吸附状态以外，还有一种新的吸附状态，它的Ｃ—Ｏ伸缩振动频率比前者低得多．在ＣＯ暴露过程中，ＣＯ分子首先吸附在低Ｃ—Ｏ伸缩振动频率的状态，随着ＣＯ覆盖度的增加，两种吸附状态的Ｃ—Ｏ伸缩振动频率都向高频方向移动．两种吸附状态的Ｃ—Ｏ伸缩振动频率也与Ｃｓ的覆盖度有关．当ＣＯ覆盖度饱和后，在Ｃｓ覆盖度较高的表面上两种吸附状态的Ｃ—Ｏ伸缩振动频率相对较低 High-resolution electron energy loss spectra of CO and Cs co-adsorbed on the Ru (101-0) surface show that CO has two adsorption states on the Ru (101-0) surface covered with Cs, except for CO In addition to a seemingly similar adsorption state, there is a new state of adsorption, which has a much lower C-O stretching frequency than the former. During CO exposure, the CO molecules first adsorbed at the low C-O stretching vibration frequency. With the increase of CO coverage, the C-O stretching vibration frequencies of the two adsorption states all moved toward the high frequency. The C-O stretching vibration frequencies of the two adsorption states are also related to the coverage of Cs. When the CO coverage is saturated, the frequency of C-O stretching vibration of the two adsorption states on the Cs coverage is relatively low