Jiang Wenjun, Zhou Liang, Phong Nguyen Tan, Wang Lingzhi, Zhang Jinlong, Liu Yongdi, Lei Juying
National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, P.R. China.
Chem Asian J. 2024 Dec 16;19(24):e202400901. doi: 10.1002/asia.202400901. Epub 2024 Nov 29.
To take the pronounced issue of recombination among photogenerated electrons and holes in the photocatalytic reaction, we report a WC/CaInS Schottky heterojunction photocatalyst using a straightforward one-step hydrothermal method and applied it for the enhanced hydrogen evolution reaction in photocatalysis. A stable Schottky energy barrier can be formed by closely connecting the metal-like WC with the n-type semiconductor CaInS, accelerating the migration of photogenerated carriers. Meanwhile, WC can lower the overpotential for hydrogen evolution, leading to a notable enhancement in the photocatalytic hydrogen evolution rate. The hydrogen evolution rate of the optimal WC/CaInS Schottky heterojunction photocatalyst WCIS1 : 1 was approximately 2.3 times higher than that of Pt-loaded photocatalyst CIS+Pt. This study delves into the application significance of the Schottky heterojunction principle in the photocatalytic hydrogen production reaction. Furthermore, this study provides a novel approach to replacing noble metal Pt with metal-like WC in the field of photocatalytic hydrogen evolution.
为了解决光催化反应中光生电子和空穴之间显著的复合问题，我们报道了一种采用简单一步水热法制备的WC/CaInS肖特基异质结光催化剂，并将其应用于光催化中增强析氢反应。通过将类金属WC与n型半导体CaInS紧密连接，可以形成稳定的肖特基势垒，加速光生载流子的迁移。同时，WC可以降低析氢的过电位，导致光催化析氢速率显著提高。最佳的WC/CaInS肖特基异质结光催化剂WCIS1 : 1的析氢速率比负载Pt的光催化剂CIS+Pt高约2.3倍。本研究深入探讨了肖特基异质结原理在光催化制氢反应中的应用意义。此外，本研究为光催化析氢领域中用类金属WC替代贵金属Pt提供了一种新方法。
