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arXiv 0903.0288cond-mat.mtrl-sci
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氢原子在邻位Pt表面上电子性质的第一性原理研究

Electronic properties of H on vicinal Pt surfaces: A first-principles study

T. Vehviläinen, P. Salo, T. Ala-Nissila, S. C. Ying

摘要:

本文采用第一性原理密度泛函方法研究了H原子吸附在Pt(111)、Pt(211)和Pt(331)表面的电子结构。全三维势能面(3D PES的)以及各种吸附位点上的局部电子态密度。结果表明,步骤修改PES显着。这种效应是非局部的,并延伸到(111)阶地的区域。我们还发现,不同类型的台阶有不同类型的影响PES相比,一个理想的Pt(111)表面。在这项工作中计算的全三维PES的振动和扩散动力学的H吸附原子吸附在这些邻表面的理论研究提供了一个起点。

英文摘要:

In this work, we use the first-principle density-functional approach to study the electronic structure of a H atom adsorbed on the ideal Pt(111) and vicinal Pt(211) and Pt(331) surfaces. Full three-dimensional potential-energy surfaces (3D PES's) as well as local electronic density of states on various adsorption sites are obtained. The results show that the steps modify the PES considerably. The effect is nonlocal and extends into the region of the (111) terraces. We also find that different type of steps have different kind of influence on the PES when compared to the one of the ideal Pt(111) surface. The full 3D PES's calculated in this work provide a starting point for the theoretical study of vibrational and diffusive dynamics of H adatoms adsorbed on these vicinal surfaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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