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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Theoretical Study of the Interaction of NO_2 Molecule with a Metal-Zeolite Model (Metal = Cu, Ag, Au)
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Theoretical Study of the Interaction of NO_2 Molecule with a Metal-Zeolite Model (Metal = Cu, Ag, Au)

机译:NO_2分子与金属-沸石模型(金属= Cu,Ag,Au)相互作用的理论研究

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摘要

Theoretical calculations of the NO_2 adsorption on transition metal-exchanged zeolite (metal = Cu, Ag, Au) were carried out using density functional theory and MP2 approaches. A tritetrahedral model (T3) was used to represent a fragment of a zeolite. The density functional calculations predict that the NO_2 adsorption energy follows the order: Cu-T3 > Au-T3 > Ag-T3. The analysis of the electronic properties shows that the d~(10)-s~1d~9 promotion favors the interaction between the NO_2 molecule and the metallic center. The results show that there is a charge transfer from the metallic ion to the NO-2 molecule, which produces a weakening of the N-O bond The topology of he laplacian of the density correctly predicts the existence of the two stable isomers found in this work, but not the adsorption order.
机译:利用密度泛函理论和MP2方法对NO_2在过渡金属交换沸石(金属= Cu,Ag,Au)上的吸附进行了理论计算。使用三面体模型(T3)表示沸石的片段。密度泛函计算预测NO_2的吸附能遵循以下顺序:Cu-T3> Au-T3> Ag-T3。电子性质分析表明,d〜(10)-s〜1d〜9促进了NO_2分子与金属中心的相互作用。结果表明,电荷从金属离子转移到NO-2分子,这会削弱NO键。密度的Lalaplacian拓扑正确地预测了这项工作中发现的两种稳定异构体的存在,但不是吸附顺序。

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