Interplay between defect structure and catalytic activity in the Mo(10-x)V(x)O(y) mixed-oxide system.
Interplay between defect structure and catalytic activity in the Mo(10-x)V(x)O(y) mixed-oxide system.
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Mo(10-x)V(x)O(y)混合氧化物体系中缺陷结构与催化活性之间的相互作用
DOI:
10.1002/cphc.201100393
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Rüdiger-A. Eichel
中科院分区:
文献类型:
--
作者:
Peter Jakes;Nina Blickhan;Tim Jekewitz;Alfons Drochner;Herbert Vogel;Hartmut Fuess;Rüdiger-A. Eichel
The Mo10− xVxOy solid‐solution systems (0≤ x≤ 10) were studied by electron paramagnetic resonance spectroscopy. The results show the existence of paramagnetic vanadyl VO2+ species, whose concentration becomes maximal for Mo5V5Oy. A quantitative analysis of the VO2+ concentration as a function of the Mo/V ratio allows it to characterize the prevailing defect chemistry in the Mo10− xVxOy system. In this respect, the semi‐conducting properties of Mo10− xVxOy are p‐type in an interval of Mo9V1Oy–Mo5V5Oy and switch into n‐type because of the conduction electrons in a composition range of Mo5V5Oy–Mo1V9Oy. Highest catalytic activity is obtained when vanadium acts as an acceptor center and oxygen vacancies \left(υ_O^∙∙\right) are formed for reasons of charge compensation. In addition to the surface, υ_O^∙∙ and VO2+ centers in the bulk have to be considered too for heterogeneous catalysis.
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DOI:
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发表时间:
2002
期刊:
影响因子:
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DOI:
10.1002/zaac.19733990205
发表时间:
1973-07
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
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作者:
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通讯作者:
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