摘要
本工作用高分辨电子能量损失谱(HREELS)对Fe(110)面CO和K的共吸附进行了研究,发现存在三种CO吸附状态,表现为不同的C—O振动频率,当θ_k=0.03时,存在与K近程、中程和远程三种不同相互作用的CO,当θ_k=0.06时,与K远程作用的CO吸附状态消失,近程作用的CO占据主要地位,所有CO的C—O振动频率均随CO暴露量的增加向高波数方向移动,随着表面K的增多,CO—Fe振动损失峰消失。
Co-adsorption of CO and potassium on Fe(110) is investigated by HREELS. We find three CO adsorption states, with different C-O stretching frequencies. When θK=0.03, the three loss peaks are ascribed to three kinds of interactions i.e., short-range, medium-range and long-range interaction. When θK = 0.06, the long-range interaction adsorption state disappears, but the short-range state dominats. All C-O stretching frequencies shift to higher wavenum-ber with the increasing of CO exposure. CO-Fe loss peak disappears with the increasing of potassium atoms on the surface.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第10期1691-1696,共6页
Acta Physica Sinica
基金
国家自然科学基金资助的课题
