用密度泛函理论研究双金属(Au+Pt)的化学性质

Y. Benkrima, A. Souigat, M. E. Soudani, Mohammed Seyf Eddine Bougoffa, Z. Korichi, O. Bentouila
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摘要

在这项工作中,我们提出了一个基于密度泛函理论(DFT)的系统理论研究,通过该理论,我们旨在揭示掺杂铂铂原子的金金团簇的潜在影响,并寻找由于这种掺杂而产生的金团簇的新结构和化学性质,其中研究仅限于在每种簇大小的其他异构体中选择能量最低的簇簇。得到的较低能量的稳定结构显示了从n = 6开始的三维结构,掺杂铂铂原子的Aun团簇导致这些团簇的所有性能得到改善。研究和讨论了其化学和电子性质,如垂直电子亲和、绝热电子亲和、焓和化学硬度与簇大小的关系。采用广义梯度密度近似法(GGA)和轨迹密度近似法(LDA)计算各性状,并进行比较。结果表明,得到的结果与以前的理论和实验研究接近,有些相似。这种类型的研究是第一次使用密度函数理论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chemical properties of Bimetallic (Au+Pt) using Density Functional Theory
In this work, we present a systematic theoretical study based on the density function theory (DFT), Through which we aim to shed light on the potential effects of dopped gold Au clusters with a platinum Pt atom, and the search for the new structural, chemical properties that gold clusters will have thanks to this doping, Where the study is limited to the selection of clusters with the lowest energy among the other isomers for each cluster size. The resulting stable structures with lower energy reveal three dimensional structures starting at n = 6, Doping Aun clusters with platinum Pt atom leads to improvement in all properties calculated for these clusters. The chemical and electronic properties have been studied and discussed, for example Vertical electronic affinity, adiabatic electronic affinity, enthalpy and chemical hardness as a function of cluster size. All properties were calculated using generalized gradient density approximation (GGA) and locus density approximation (LDA) and compared them with each other. Where it turns out that the results obtained are close to previous theoretical and experimental studies somewhat similar to them. This type of study is presented for the first time using the density function theory.
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