Photoelectron spectra of Nbn− clusters: Correlation between electronic structure and hydrogen chemisorption
Photoelectron spectra of Nbn− clusters: Correlation between electronic structure and hydrogen chemisorption
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Nbn− 团簇的光电子能谱：电子结构与氢化学吸附之间的相关性
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
W. Eberhardt
中科院分区：
文献类型：
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作者：
H. Kietzmann;J. Morenzin;P. S. Bechthold;G. Ganteför;W. Eberhardt
Photoelectron spectra of mass-separated Nbn− clusters reveal an even/odd alternation for n=6–17, indicating a closed electronic shell of the neutral even-numbered clusters. The HOMO–LUMO gap of Nb8, Nb10, and Nb16 is found to be larger than that of the other even-numbered clusters, which correlates with the low H2 reactivities of these species. The spectrum of Nb15− is different from all other clusters in this size range, which might be an indication for a geometric bcc shell closing. The influence of the electronic structure of the clusters on the reactivity is discussed.
