论文标题
Mo Thio和Oxo-Thio分子复合物作为2D材料上光催化氢的自我修复催化剂
Mo Thio and Oxo-Thio Molecular Complexes Film as Self-Healing Catalyst for Photocatalytic Hydrogen Evolution on 2D Materials
论文作者
论文摘要
由于其独特的吸收特性，2D半导体金属二核苷的纳米片是太阳能转化的有吸引力的材料。在这里，我们提出了锚定在2D P-WSE2纳米片上的Mo硫硫代和氧硫代复合物，以在可见光照射下有效地分裂，光电流密度在-0.2 v/nhe时高达2.0 mA cm-2。除了发展高电催化活性外，MO复合膜还显示出可以显示出治愈表面缺陷的能力。我们提出，观察到的表面缺陷的愈合是由Mo复合物的2D WSE2底物的点缺陷引起的，例如（MOS4）2-，（MOOS3）2-，（MO2S6O2）2-如DFT计算所示。除了显示催化和愈合效果外，还显示硫代 - 硫代含量复合物膜可增强氢进化反应的电荷载体分离和迁移，从而代表了表现出多个特性的多组分钝化层的示例。
2D semiconducting nanosheets of Transition Metal Dichalcogenides are attractive materials for solar energy conversion because of their unique absorption properties. Here, we propose Mo thio- and oxo-thio-complexes anchored on 2D p-WSe2 nanosheets for efficient water splitting under visible light irradiation with photocurrent density up to 2.0 mA cm-2 at -0.2 V/NHE. Besides developing high electro-catalytic activity, the Mo complexe films were shown to display ability to heal surface defects. We propose that the observed healing of surface defects arises from the strong adsorption on point defects of the 2D WSe2 substrate of Mo complexes such as (MoS4)2-, (MoOS3)2-, (Mo2S6O2)2- as shown from DFT calculations. In addition to display catalytic and healing effects, the thio-, oxo-thio Mo complexes films were shown to enhance charge carrier separation and migration for the hydrogen evolution reaction, thus representing an example of multicomponent passivation layer exhibiting multiple properties.
