...
首页> 外文期刊>Physical review >Water adsorption on rutile TiO_2(110) for applications in solar hydrogen production:A systematic hybrid-exchange density functional study
【24h】

Water adsorption on rutile TiO_2(110) for applications in solar hydrogen production:A systematic hybrid-exchange density functional study

机译:用于太阳能制氢的金红石型TiO_2(110)的水吸附:系统的混合交换密度泛函研究

获取原文
获取原文并翻译 | 示例
           

摘要

Periodic hybrid-exchange density functional theory calculations are used to predict the structure of water on the rutile TiO_2(110) surface (Θ ≤ 1 ML), which is an important first step towards understanding the photocatalytic processes that occur in solar water splitting. A detailed model describing the water-water and water-surface interactions is developed by exploring thoroughly the adsorption energetics. The possible adsorption mode—molecular, dissociative, or mixed—and the binding energy are studied as a function of coverage and arrangement, thus separation, of adsorbed species. These dependencies (coverage and arrangement) have a significant influence on the nature of the interactions involved in the H_2O-TiO_2 system. The importance of both direct intermolecular and surface-mediated interactions between surface species is emphasized. Finally, to gain insight into the photooxidation of adsorbed species at the surface, the electronic structure of the predicted adsorbate-substrate geometries is analyzed in terms of total and projected density of states.
机译:周期性的混合交换密度泛函理论计算可用于预测金红石TiO_2(110)表面(Θ≤1 ML)上的水结构,这是理解太阳能分解过程中发生的光催化过程的重要第一步。通过深入研究吸附能,建立了描述水-水和水-表面相互作用的详细模型。研究了可能的吸附模式(分子的,解离的或混合的)和结合能,取决于被吸附物质的覆盖和排列以及分离的功能。这些依赖关系(覆盖和排列)对H_2O-TiO_2系统中涉及的相互作用的性质具有重大影响。强调了表面物种之间直接的分子间和表面介导的相互作用的重要性。最后,为了深入了解被吸附物质在表面的光氧化作用,根据状态的总密度和预测密度分析了预测的被吸附物-基质几何形状的电子结构。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号