Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
Angew Chem Int Ed Engl. 2017 Apr 3;56(15):4206-4210. doi: 10.1002/anie.201700150. Epub 2017 Mar 15.
Z-scheme water splitting is a promising approach based on high-performance photocatalysis by harvesting broadband solar energy. Its efficiency depends on the well-defined interfaces between two semiconductors for the charge kinetics and their exposed surfaces for chemical reactions. Herein, we report a facile cation-exchange approach to obtain compounds with both properties without the need for noble metals by forming Janus-like structures consisting of γ-MnS and Cu S with high-quality interfaces. The Janus-like γ-MnS/Cu S structures displayed dramatically enhanced photocatalytic hydrogen production rates of up to 718 μmol g h under full-spectrum irradiation. Upon further integration with an MnO oxygen-evolution cocatalyst, overall water splitting was accomplished with the Janus structures. This work provides insight into the surface and interface design of hybrid photocatalysts, and offers a noble-metal-free approach to broadband photocatalytic hydrogen production.
Z 型水分解是一种有前途的方法，基于宽带太阳能的高性能光催化。其效率取决于两种半导体之间电荷动力学的明确定义界面及其用于化学反应的暴露表面。在此，我们报告了一种简便的阳离子交换方法，通过形成具有高质量界面的类 Janus γ-MnS 和 CuS 来获得具有这两种特性的化合物，而无需使用贵金属。类 Janus γ-MnS/CuS 结构在全光谱照射下表现出高达 718 μmol·g-1·h-1 的显著增强的光催化制氢速率。进一步与 MnO 氧析出共催化剂集成，Janus 结构实现了整体水分解。这项工作为混合光催化剂的表面和界面设计提供了深入了解，并为无贵金属的宽带光催化制氢提供了一种方法。
