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Structural and dynamical properties of water adsorption on PtO2(001)

机译:PTO2(001)对水吸附的结构和动态性质

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摘要

The structural, dynamical and electronic properties of water molecules on the -PtO2(001) surface has been studied using first-principles calculations. For both water monomer and monolayer, the adsorption energies are found to be three to five times larger than that of water adsorption on the Pt surface, and the dissociative adsorption configurations are energetically more stable. The adsorption energies are positively correlated with the charge transfer between the water molecule and the substrate, and the charge-rebalance between the Pt and O atoms of -PtO2 upon water adsorption. More interestingly, an exceptionally large redshift is observed in the OH stretching mode of the adsorbed water monomer, due to the very strong hydrogen bonding with the substrate. The strong water-substrate interactions have significant effects on the molecular orbitals of the chemisorbed water molecules.
机译:使用了第一原理计算研究了-PTO2(001)表面上的水分子的结构,动态和电子性质。 对于水单体和单层,发现吸附能量比PT表面上的水吸附量大于3至5倍,并且离防吸附配置能量更稳定。 吸附能量与水分子和基材之间的电荷转移呈正相关,以及-PTO2在水吸附时的Pt和O原子之间的电荷重新平衡。 更有意义地,由于与基材的非常强的氢键合,在吸附的水单体的OH拉伸模式中观察到异常大的红移。 强水基底物相互作用对化学水分子的分子轨道具有显着影响。

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  • 来源
    《RSC Advances》 |2018年第27期|共9页
  • 作者

    Yang Yong;

  • 作者单位

    Chinese Acad Sci Inst Solid State Phys Key Lab Mat Phys Hefei 230031 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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