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Adsorption of CO, SO2, HCN, NH3, and H2CO on zigzag GaP nanotubes: a QM/MM study

机译:曲折形GaP纳米管吸附CO,SO2,HCN,NH3和H2CO的QM / MM研究

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摘要

The interactions of the single-walled zigzag (5, 0), (6, 0), and (7, 0) GaP nanotubes (GaPNTs) with CO, SO2, HCN, NH3, and H2CO molecules are theoretically studied at the ONIOM(B3LYP/6-31G(d):UFF) level. A pyrene-like ring of the nanotube is chosen as an adsorption site in the high layer of the ONIOM calculations for the adsorption of a single molecule. Binding energy, Gibbs free energy change, density of states, and Mulliken charge transfer are computed to analyze the nature of the binding between GaPNT and the adsorbate molecule. The bindings of CO and H2CO towards GaPNTs are weaker than those of NH3, SO2, and HCN molecules. The strongest adsorption is found to be with NH3. The dispersion corrected functional (wB97XD) has been introduced to compare the results with those of the B3LYP functional.
机译:在ONIOM上理论研究了单壁之字形(5,0),(6,0)和(7,0)GaP纳米管(GaPNT)与CO,SO2,HCN,NH3和H2CO分子的相互作用B3LYP / 6-31G(d):UFF)级别。在ONIOM计算的高层中,选择纳米管的pyr状环作为吸附位点,以吸附单个分子。计算结合能,吉布斯自由能变化,状态密度和穆里肯电荷转移,以分析GaPNT与被吸附物分子之间结合的性质。 CO和H2CO与GaPNT的结合弱于NH3,SO2和HCN分子。发现最强的吸附是NH3。引入了色散校正功能(wB97XD)以将结果与B3LYP功能的结果进行比较。

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