XPS, TPD and TPR studies of Cs–O complexes on silver: their role in ethylene epoxidation
XPS, TPD and TPR studies of Cs–O complexes on silver: their role in ethylene epoxidation
复制标题
DOI：
10.1016/s1381-1169(00)00101-1
复制
发表时间：
2000-09
影响因子：
--
通讯作者：
E. Podgornov;I. Prosvirin;V. Bukhtiyarov
中科院分区：
文献类型：
--
作者：
E. Podgornov;I. Prosvirin;V. Bukhtiyarov
用XPS和TPD研究了Ag（111）和Ag（110）单晶表面Cs氧化物的形成与Cs覆盖度、氧分压的关系。确定的特性与Ag/Al 2 O3催化剂的数据的比较，使我们能够选择那些的Cs-O结构，这是常见的两种类型的样品：过氧化铯和氧化铯低。讨论了它们对乙烯氧化反应的影响机理。
Various Cs oxides formed on the Ag(111) and Ag(110) single crystals depending on cesium coverage, oxygen pressure have been identified by XPS and TPD. The comparison of the determined characteristics with the data for the Ag/Al2O3catalysts allows us to select those of the Cs–O structures which are common for both types of samples: cesium peroxide and cesium suboxide. Mechanisms of their influence onto routes of ethylene oxidation are discussed.