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用热脱附谱(TDS)方法研究了乙烯(C2H4)在Ru(0001)表面上的吸附.在低温下(200K以下)乙烯可以在清洁及有Cs的Ru(0001)表面上以分子状态稳定吸附,在衬底温度升高至200K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(C2H2).在清洁的Ru(0001)表面,乙烯有两种吸附状态,脱附温度分别为275K和360K.而乙炔的脱附温度为350K.在Ru(0001)表面有Cs的存在时,乙烯分解
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关键词:
- 乙烯 /
- 钌(0001)表面 /
- 铯钌(0001)表面乙烯 /
- 钌(0001)表面 /
- 铯钌(0001)表面
The ethylene(C2H4)adsorbed on Ru(0001)surface has been studied by using thermal desorption spectroscopy(TDS).The results show that ethylene(C2H4)absorbs in molecular state on Ru(0001)surface stably below 200 K.The dehydrogenation of ethylene occurs at 200 K.The main product of the dehydrogenation of the absorbed ethylene(C2H4)is acetylene(C2H2).There are two adsorption states of ethylene on the clean Ru(0001)surface.Their desorption temperature is 275 K and 360 K respectively.The desorption temperature of acetylene is 350 K.The desorption temperature of both acetylene and ethylene rises with increasing Cs coverage.-
Keywords:
- ethylene /
- Ru(0001)surface /
- Cs/Ru(0001)surface /
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中国物理学会期刊
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