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在 2 0 0K以下乙烯 (C2 H4 )可以在Ru( 10 10 )表面上以分子状态稳定吸附 ,2 0 0K以上乙烯发生了脱氢分解反应生成乙炔 (C2 H2 )。乙烯分解生成乙炔后 ,σCC和σCH分子轨道能级向高结合能方向分别移动了 0 .5和 1.1eV。偏振角分辨紫外光电子谱 (ARUPS)结果表明 :在Ru( 10 10 )表面上 ,乙烯和脱氢反应后生成的乙炔分子的C -C键轴都不平行于表面 ,而是沿表面〈0 0 0 1〉晶向倾斜。
Ethylene (C2 H4) can be stably adsorbed on the Ru (10 10) surface at a temperature below 200 K, and acetylene (C2 H 2) is produced by the dehydrogenation decomposition of ethylene above 200 K. After acetylene is decomposed by ethylene, the σCC and σCH molecular orbital energies move to high binding energy by 0.5 and 1.1eV, respectively. The results of ARUPS showed that the C-C bond axes of acetylene molecules formed by ethylene and dehydrogenation reaction are not parallel to the surface but are along the surface <0 0 0 1> crystal tilt.