Wang Meiying, Lv Haowei, Dong Beibei, He Wenhao, Yuan Daqiang, Wang Xinchen, Wang Ruihu
Hebei Key Laboratory of Functional Polymer, School of Chemical Engineering and Technology, Hebei University of Technology, 300130, Tianjin, China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.
Angew Chem Int Ed Engl. 2024 Apr 22;63(17):e202401969. doi: 10.1002/anie.202401969. Epub 2024 Mar 7.
Photocatalytic hydrogen production based on noble metal-free systems is a promising technology for the conversion of solar energy into green hydrogen, it is pivotal and challenging to tailor-make photocatalysts for achieving high photocatalytic efficiency. Herein, we reported a hollow double-shell dyad through uniformly coating covalent organic frameworks (COFs) on the surface of hollow CoS. The double shell architecture enhances the scattering and refraction efficiency of incident light, shortens the transmission distance of the photogenerated charge carriers, and exposes more active sites for photocatalytic conversion. The hydrogen evolution rate is as high as 23.15 mmol g h, which is significantly enhanced when compared with that of their physical mixture (0.30 mmol g h) and Pt-based counterpart (11.84 mmol g h). This work provides a rational approach to the construction of noble-metal-free photocatalytic systems based on COFs to enhance hydrogen evolution performance.
基于无贵金属体系的光催化产氢是一种将太阳能转化为绿色氢能的很有前景的技术，定制光催化剂以实现高光催化效率至关重要且具有挑战性。在此，我们报道了一种通过在中空CoS表面均匀包覆共价有机框架（COFs）而形成的中空双壳二元体系。这种双壳结构提高了入射光的散射和折射效率，缩短了光生电荷载流子的传输距离，并暴露出更多用于光催化转化的活性位点。析氢速率高达23.15 mmol g h，与它们的物理混合物（0.30 mmol g h）和基于Pt的对应物（11.84 mmol g h）相比有显著提高。这项工作为构建基于COFs的无贵金属光催化体系以提高析氢性能提供了一种合理的方法。
