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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Adsorption of CO2 on the Rutile (110) Surface in Ionic Liquid. A Molecular Dynamics Simulation
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Adsorption of CO2 on the Rutile (110) Surface in Ionic Liquid. A Molecular Dynamics Simulation

机译:离子液体中金红石(110)表面上的CO2吸附。分子动力学模拟

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摘要

The adsorption of CO2 on TiO2 rutile (110) surface in room-temperature ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate (BMIM~+/PF_6~-), is studied by molecular dynamics simulation. Due to the strong electrostatic interactions between the O atom of CO2 with the unsaturated Ti atom of the rutile (110) surface, CO2 is adsorbed on the rutile (110) rather than dispersing in the IL bulk. At the interface, CO2 arranges itself in a highly ordered manner, with its D_(∞h), symmetric axis parallel to the rutile (110) surface normal, and the C=O bond is elongated for the coordinating O atom. The interfacial packing pattern is CO2, PF_6~-, and BMIM~+, in sequence, starting from the rutile (110) surface. Thus, the adsorbed CO2 molecules are confined in the narrow neighborhood adjacent to the rutile (110) surface.
机译:通过分子动力学模拟研究了室温离子液体1-丁基-3-甲基咪唑六氟磷酸盐(BMIM〜+ / PF_6〜-)中TiO2金红石(110)表面的CO2吸附。由于CO2的O原子与金红石(110)表面的不饱和Ti原子之间的强静电相互作用,CO2吸附在金红石(110)上,而不是分散在IL主体中。在界面处,CO2以高度有序的方式排列,其D_(∞h)对称轴平行于金红石(110)表面法线,并且C = O键对于配位的O原子而言是细长的。从金红石(110)表面开始,界面堆积模式依次为CO2,PF_6〜-和BMIM〜+。因此,吸附的CO 2分子被限制在与金红石(110)表面相邻的狭窄邻域中。

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