Cactus-like hierarchical nanorod-nanosheet mixed dimensional photoanode for efficient and stable water splitting
Cactus-like hierarchical nanorod-nanosheet mixed dimensional photoanode for efficient and stable water splitting
复制标题
类仙人掌分层纳米棒-纳米片混合维度光阳极用于高效稳定的水分解
DOI：
10.1016/j.nanoen.2017.03.042
复制
发表时间：
2017-05-01
期刊：
影响因子：
17.6
通讯作者：
Zhang, Yue
中科院分区：
文献类型：
--
作者：
Liu, Yichong;Kang, Zhuo;Zhang, Yue
设计了一种用CdS量子点和Ni(OH)(2)催化剂修饰的新型分级ZnO纳米棒-纳米片混合维度纳米结构作为光电化学水分解的光阳极。 FDTD模拟结果表明，所提出的新型混合2D/1D分层结构具有更好的光利用效率，从而导致光电阳极的有效异质结构界面面积更大，这意味着异质结构界面面积增加，同时保持均匀分布的光吸收，特别是在3D纳米结构的底部区域。 H-ZnO/CdS/Ni(OH)(2)的偏压光电流效率达到4.12%，是ZnO纳米片光阳极的20.6倍。更重要的是，Ni(OH)(2)催化剂的高效空穴消耗特性显着提高了光电化学稳定性。在这种混合维分层纳米结构中，每个组件协同增强PEC性能，这种新颖的设计可能会推动通过PEC水分解高效稳定地产生氢气。
A novel hierarchical ZnO nanorod-nanosheet mixed dimensional nanoarchitecture modified with CdS quantum dots and Ni(OH)(2) catalyst was designed as photoanode for photoelectrochemical water splitting. The FDTD simulation results demonstrated the better light utilization efficiency for the proposed novel mixed 2D/1D hierarchical structure and subsequently resulted in larger effective heterostructure interface area of photoanode which means the increased heterostructure interface area while maintaining evenly distributed light absorption especially at the bottom zone of 3D nanostructure. The applied bias photo-to-current efficiency of H-ZnO/CdS/Ni(OH)(2) reached 4.12%, 20.6 times that of ZnO nanosheets photoanode. More importantly, the efficient hole consumption characteristic of Ni(OH)(2) catalyst introduced the significantly improved photoelectrochemical stability. In such mixed dimensional hierarchical nanoarchitecture, each component contributed synergistically to the enhanced PEC performance, and this novel design may give impetus to promote the efficient and stable hydrogen generation via PEC water splitting.