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用热脱附谱 (TDS)方法研究了乙烯 (C2 H4)在Ru(0 0 0 1)表面上的吸附 .在低温下 (2 0 0K以下 )乙烯可以在清洁及有Cs的Ru(0 0 0 1)表面上以分子状态稳定吸附 ,在衬底温度升高至 2 0 0K以上时 ,乙烯发生了脱氢分解反应 ,乙烯分解后的主要产物为乙炔 (C2 H2 ) .在清洁的Ru(0 0 0 1)表面 ,乙烯有两种吸附状态 ,脱附温度分别为 2 75K和 36 0K .而乙炔的脱附温度为 35 0K .在Ru(0 0 0 1)表面有Cs的存在时 ,乙烯分解为乙炔的概率增大 ,乙烯和乙炔的脱附温度均随着Cs覆盖度的增加而提高用热脱附谱 (TDS)方法研究了乙烯 (C2 H4)在Ru(0 0 0 1)表面上的吸附 .在低温下 (2 0 0K以下 )乙烯可以在清洁及有Cs的Ru(0 0 0 1)表面上以分子状态稳定吸附 ,在衬底温度升高至 2 0 0K以上时 ,乙烯发生了脱氢分解反应 ,乙烯分解后的主要产物为乙炔 (C2 H2 ) .在清洁的Ru(0 0 0 1)表面 ,乙烯有两种吸附状态 ,脱附温度分别为 2 75K和 36 0K .而乙炔的脱附温度为 35 0K .在Ru(0 0 0 1)表面有Cs的存在时 ,乙烯分解为乙炔的概率增大 ,乙烯和乙炔的脱附温度均随着Cs覆盖度的增加而提高 .
The adsorption of ethylene (C2 H4) on the surface of Ru (0 0 0 1) was studied by thermal desorption spectroscopy (TDS) .Even at low temperature (up to 2000 K), ethylene could be adsorbed on clean and Cs Ru 0 1) on the surface of the stable adsorption of molecules in the substrate temperature above 200K, ethylene dehydrogenation decomposition reaction occurs, the main product of ethylene decomposition of acetylene (C2H2) in the clean Ru 0 0 0 1), there are two adsorption states of ethylene, the desorption temperatures are 2 75K and 36 0K respectively, while the desorption temperature of acetylene is 35 0 K. In the presence of Cs on the surface of Ru (0 0 0 1) The probability of ethylene decomposing into acetylene increased, and the desorption temperature of ethylene and acetylene increased with the increase of Cs coverage. The thermal desorption spectroscopy (TDS) At low temperature (below 200K), ethylene can be stably adsorbed on the surface of clean and Cs-containing Ru (0 0 0 1) in the molecular state. When the substrate temperature is increased to more than 200K, Ethylene dehydrogenation decomposition reaction, the main product of ethylene decomposition acetylene (C2H2) .In the clean Ru (0 0 0 1) surface, there are two adsorption states of ethylene, the desorption temperatures were 2 75 K and 36 0 K. The desorption temperature of acetylene is 35 0 K. The presence of Cs on Ru (0 0 0 1) surface increases the probability of ethylene decomposing to acetylene, and the desorption temperatures of ethylene and acetylene are both Cs coverage increased.