Surface oxygen and chemical specificity at copper and caesium surfaces
Surface oxygen and chemical specificity at copper and caesium surfaces
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铜和铯表面的表面氧和化学特异性
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. W. Roberts
中科院分区：
文献类型：
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作者：
A. Carley;A. Chambers;P. R. Davies;G. Mariotti;Raju Kurian;M. W. Roberts
在铜和铯表面的表面氧的化学特性，以确定甲醇，二氧化碳和乙烯的氧化反应途径。光电子能谱和程序升温脱附都证实了甲醇氧化生成甲醛或甲酸盐的两种反应途径。在低覆盖度下，预吸附氧和共吸附氧都激活CO2在铜上的吸附，在300 K下得到表面碳酸盐，而乙烯碳-碳键断裂和碳酸盐形成在铯表面在80 K下发生。扫描隧道显微镜的研究数据的相关性进行了讨论。
The chemical specificity of surface oxygen at copper and caesium surfaces is shown to determine the reaction pathways for oxidation of methanol, carbon dioxide and ethene. Both photoelectron spectroscopy and temperature-programmed desorption establish that two reaction pathways are possible in methanol oxidation to give either formaldehyde or formate. Both preadsorbed oxygen, at low coverages, and coadsorbed oxygen activate CO2 adsorption on copper to give a surface carbonate at 300 K, whereas ethene carbon–carbon bond cleavage and carbonate formation occur at caesium surfaces at 80 K. The relevance of the data to studies by scanning tunnelling microscopy is discussed.