Theoretical study of the adsorption of Cs, Cs+, I, I-, and CsI on the C60 fullerene

Theoretical study of the adsorption of Cs, Cs+, I, I-, and CsI on the C60 fullerene
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C60富勒烯上Cs、Cs、I、I-和CsI吸附的理论研究

DOI:
10.1080/00223131.2015.1126206
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发表时间:
2016
期刊:
J. Nucl. Sci. Tech.
影响因子:
--
通讯作者:
K. Yokoyama
K. Yokoyama
中科院分区:
--
文献类型:
--
作者:
T. Kobayashi;K. Yokoyama

文献摘要

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报道了铯原子 (Cs)、碘化铯分子 (CsI)、碘原子 (I)、铯阳离子 (Cs+) 和碘化物阴离子 (I−) 吸附到单个富勒烯分子 (C60) 表面的理论研究。采用库仑衰减法 (CAM-B3LYP) 的混合交换相关函数。对于 Cs、CsI、I、Cs+ 和 I−,计算得出的吸附能(即吸附引起的焓变的相反值)分别为 143、12、9、46 和 49 kJ mol−1。在 1000 K 温度下,Cs 的平衡常数计算为 7×103atm−1,比 CsI 高 7 个数量级,表明 C60 分子对 CsI 分子高度选择性地吸附 Cs 原子。
Theoretical investigation for the adsorption of the cesium atom (Cs), the cesium iodide molecule (CsI), the iodine atom (I), the cesium cation (Cs+), and the iodide anion (I−) onto the surface of a single fullerene molecule (C60) are reported. A hybrid exchange–correlation functional using the Coulomb-attenuating method (CAM-B3LYP) is employed. The adsorption energies, i.e., the opposite of enthalpy change through adsorption, are calculated to be 143, 12, 9, 46, and 49 kJ mol−1for Cs, CsI, I, Cs+, and I−, respectively. The equilibrium constant for Cs is calculated to be 7×103atm−1at the temperature of 1000 K and is seven orders of magnitude higher than that for CsI, indicating that the C60molecule adsorb the Cs atom highly selectively against the CsI molecule.