乙醇在Mn薄膜／Rh（100）上吸附和分解的研究

应用高分辨电子能量损失谱（HREELS）和热脱附谱（TDS），研究了Mn薄膜／Rh(100)上乙醇的吸附和分解，提出了表面吸附和分解的反应工，在300K时，蒸镀的Mn在清洁Rh(100)表面上以层层模式生长；在130－300K间，在25mLMn/Rh(100)表面上吸附20L乙醇的TDS结果与乙醇在Rh(100)表面上的结果一致在155K处，脱附出多层凝聚态吸附的乙醇；升温到255K，脱附出H2和CH4，继续升温，出现了与乙醇在R (100)表面上不一致的现象，在470K，同时出现了第2个H2和CH4的脱附峰，在500K，脱附极少量的CO；在950K附近，脱附出大量CO。

Adsorption and Decomposition of Ethanol on the Film of Mn/Rh(100) by HREELS and TDS

Adsorption and decomposition of ethanol on the film of Mn/Rh(100) have been studied by high|resolution electron energy loss spectroscopy (HREELS) and thermal desorption spectroscopy (TDS). At 300 K, the trends of the Mn deposited on clean Rh(100) surface are in good consistence with a model of layer|by|layer growth. Between 130 and 300 K, the TDS results of the exposure of 20 L ethanol on {Rh(100)} surface with deposited 25 mL Mn films are the same as those of the exposure of 20 L ethanol on clean Rh(100) surface. The ethanol multilayers on the Mn films are desorbed at 155 K, and when the temperature increased to 255 K, the desorption of H-2 and CH-4 adsorbed on the Mn films occurs. Upon heating, some differences of the results of 20 L ethanol on clean Rh(100) surface appear. At 470 K, the desorption peaks of H-2 and CH-4 appear again and the temperatures of desorption are also the same. Comparing with the desorption peaks of CO at about 900 K, the desorption peaks of CO at 500 K are rather small.