| CO在K/Cu(111)表面吸附的功函数变化 |
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| 引用本文： | 李海洋,朱立,徐亚伯,蔡莲珍. CO在K/Cu(111)表面吸附的功函数变化[J]. 物理学报, 1991, 40(4): 625-629 |
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| 作者姓名： | 李海洋 朱立 徐亚伯 蔡莲珍 |
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| 作者单位： | 浙江大学物理系,杭州,310027 |
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| 摘 要： | K覆盖的Cu(111)表面在室温下可吸附CO(可能是分解吸附),在K的覆盖度θK明显小于θmin(θmin≈0.18)的范围内,室温下CO的吸附使表面功函数增大。当θK≥θmin时,表面功函数先减小,达一极小值后再随CO暴露量增大。这一结果可以用凝胶一平板(Jellium-slab)模型的图象很好地解释。关键词：
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| 关 键 词： | CO K Cu 表面 吸附 功函数 |
| 收稿时间： | 1990-06-01 |
WORK FUNCTION STUDY OF CO AND K COADSORPTION ON Cu(lll) SURFACE |
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| LI HAI-YANG,ZHU LI,XU YA-BO and CAI LIAN-ZHEN. WORK FUNCTION STUDY OF CO AND K COADSORPTION ON Cu(lll) SURFACE[J]. Acta Physica Sinica, 1991, 40(4): 625-629 |
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| Authors: | LI HAI-YANG ZHU LI XU YA-BO CAI LIAN-ZHEN |
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| Abstract: | Coadsorption of CO and K on Cu(lll) surface was investigated using a Kelvin probe. We found that CO can adsorb (probably dissociatively) on the potassium precovered Cu(lll) surface at room temperature. When θK<θmin, (θmin = 0.18) the adsorption of CO makes the work function increase. When θK>θmin, the work function decreases at first, and then increases with amount of CO exposure. The results can be well accounted for by the jellium slab model. |
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