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利用紫外光电子谱 (UPS)对乙烯 (C2 H4)和乙炔 (C2 H2 )气体在Ru(10 10 )表面的吸附及与K的共吸附进行了研究 ,实验结果表明 :当衬底温度超过 2 0 0K ,乙烯即发生脱氢反应后 ,σCH 和σCC 能级均向高结合能方向移动 .在室温下 ,σCH和σCC 能级位置与乙炔在Ru(10 10 )表面的吸附时的分子能级完全一致 .乙烯发生脱氢反应后的主要产物为乙炔 .衬底温度从 12 0K升到室温 ,Ru(10 10 )表面上乙炔的σCH 和σCC 能级均未发现变化 .室温下乙炔仍然可以在Ru(10 10 )表面以分子状态稳定吸附 .在有K的Ru(10 10 )表面上 ,室温时σCC谱峰几乎消失 .碱金属K的存在促进了乙炔的分解 .
The adsorption of C2H4 and C2H2 on the Ru (10 10) surface and the co-adsorption with K were studied by ultraviolet (UV) spectroscopy. The experimental results show that when the substrate temperature exceeds 20 0K, the ethylene dehydrogenation reaction occurs, the σCH and σCC energy levels are moving towards high binding energy at room temperature, σCH and σCC energy level position and acetylene Ru (10 10) surface adsorption molecular level completely The main product of ethylene dehydrogenation reaction is acetylene.Under the temperature of substrate from 12 0K up to room temperature, the σCH and σCC levels of acetylene on Ru (10 10) surface are not changed.At room temperature, acetylene can still be Ru (10 10), the surface is stable in the molecular state, and the peak of σCC almost disappears at room temperature on Ru (10 10) surface with K. The presence of alkali metal K promotes the decomposition of acetylene.