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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Physicochemical Investigations of the Basicity of the Cation Exchanged ETS-10 Molecular Sieves
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Physicochemical Investigations of the Basicity of the Cation Exchanged ETS-10 Molecular Sieves

机译：阳离子交换ETS-10分子筛碱性的理化研究

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摘要

Alkali-metal exchanged M-ETS-10 (M = Li, Na, K, Rb, Cs, and Ba) molecular sieves have been investigated by different techniques such as X-ray diffraction, FTIR, TPD, and XPS. It is found that the overall Lewis basicity in M-ETS-10 increases as the cation is changed from Li to Cs in the alkali cation series. FTIR spectra and TPD of adsorbed CO_2 indicate the presence of different types of adsorbed CO_2 species. XPS studies reveal an increase in the extent of destabilization of O 2p valence levels from Li-ETS-10 to Cs-ETS-10 systems. A strong overlap is observed between Cs 5p and O 2p valence bands. Catalytic activity of Pt supported on M-ETS-10 for n-hexane conversion to benzene increases with the basicity of the support and the same is correlated with the FTIR, TPD, and XPS results.
机译：已通过不同的技术（例如X射线衍射，FTIR，TPD和XPS）研究了碱金属交换的M-ETS-10（M = Li，Na，K，Rb，Cs和Ba）分子筛。发现当碱金属阳离子系列中的阳离子从Li变为Cs时，M-ETS-10中的整体Lewis碱度增加。吸附的CO_2的FTIR光谱和TPD表明存在不同类型的吸附的CO_2种类。 XPS研究表明，从Li-ETS-10到Cs-ETS-10系统，O 2p价水平不稳定的程度有所增加。在Cs 5p和O 2p价带之间观察到强烈的重叠。 M-ETS-10上担载的Pt的正己烷转化为苯的催化活性随载体的碱性而增加，并且与FTIR，TPD和XPS结果相关。

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