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一、引言固体表面的原子排列结构和吸附物在表面上的吸附位置和分布,是了解有关多相催化作用的基础。低能电子衍射(Low Energy Electron Diffraction,简称LEED)是目前使用最多的测定固体表面结构的方法。电子衍射现象是本世纪20年代发现的。1924年de Broglie 提出了粒子具有波动性质的假设。1925年
I. INTRODUCTION The atomic arrangement of solid surfaces and the adsorption sites and distributions of adsorbates on the surface are the foundations for understanding the heterogeneous catalysis. Low Energy Electron Diffraction (LEED) is currently the most widely used method for the determination of solid surface structures. Electron diffraction phenomenon was discovered in the 1920s. In 1924 de Broglie proposed the hypothesis that particles have a fluctuating nature. 1925