Liu Wei, Tian Qingyong, Yang Jian, Zhou Yannan, Chang Hongwei, Cui Wenhui, Xu Qun
College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, P. R. China.
Henan Institutes of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China.
Chem Asian J. 2021 May 17;16(10):1253-1257. doi: 10.1002/asia.202100239. Epub 2021 Apr 12.
Two-dimensional (2D) heterostructures based on localized surface plasmon resonance (LSPR) have a great potential for solar energy harvesting applications. Exploring 2D amorphous plasmonic heterostructures with high light absorption and catalytic activity is desirable yet challenging. Herein, 2D Pd/MoO amorphous heterostructures can be obtained by immobilizing Pd single atoms in unsaturated coordination sites of amorphous MoO , because of strong metal-support interactions, and it reaches a current density of 50 μA cm for photoelectrochemical response with good durability, and exhibits a high incident-photon-to-current-conversion efficiency (IPCE) of 14.8% at 460 nm. Such an enhanced catalytic effects are contributed to the enhanced light absorption in visible region and change of electronic structure owing to enhanced electron transfer through dominant Pd-O bonds, which facilitate water splitting. This work moves a step closer to the expansion of photovoltaic device with the high conversion efficiency for visible light for amorphous heterostructures.
基于局域表面等离子体共振（LSPR）的二维（2D）异质结构在太阳能收集应用中具有巨大潜力。探索具有高光吸收和催化活性的二维非晶等离子体异质结构是理想的，但具有挑战性。在此，由于强金属-载体相互作用，通过将钯单原子固定在非晶态MoO的不饱和配位位点上，可以获得二维Pd/MoO非晶异质结构，其光电化学响应的电流密度达到50 μA cm，具有良好的耐久性，并且在460 nm处表现出14.8%的高入射光子到电流转换效率（IPCE）。这种增强的催化作用归因于可见光区域光吸收的增强以及由于通过主要的Pd-O键增强电子转移导致的电子结构变化，这有利于水分解。这项工作朝着为非晶异质结构扩展具有高可见光转换效率的光伏器件迈出了一步。
