Cu(111)面K-O复合物的形成

FORMATION OF K-O COMPLEXES IN COADSORPTION OF CO AND K ON Cu(lll) SURFACE

本工作对室温Cu(111)面CO,O_2和K的共吸附进行研究。高分辨电子能量损失谱(HRE-ELS)的实验结果表明:由于K的出现,室温下Cu表面上可以有分子状态的CO存在。C0与K在Cu(111)面上共吸附时,CO分子中的O可以和K形成“K-O”复合物,“K-O”复合物的形成与K在Cu表面上的状态有关。只有在K覆盖度大于0.04时,K原子出现退极化时。“K-O”复合物才被观察到。

CO, O and K coadsorption on Cu(lll) at oom temperature was investigated using high resolution electron energy loss spectroscopy (HREELS). The experimental results show that CO can adsorb on Cu(lll) surface precovered wi h K at room temperature and coadsorption of CO and K produce the K-O complexes. The K-O complexes can form only from the depolarized K at higher K coverage (θk>0.04).