【摘要】 光催化产氢是解决环境污染和能源危机的有效途径之一。本研究构筑了Ni_x-MoS₂/ZnIn₂S₄异质结，以增强光生电子和空穴的分离并增加了产氢活性位点的数量。催化剂表征和理论计算表明，Ni_x-MoS₂与ZnIn₂S₄界面处的Ni可作为电荷转移的桥梁，Ni―S键是H₂O解离的活性位点，并且Ni_x-MoS₂表面上靠近硫空位处的硫位点促进了产氢反应。由于硫空位和Ni掺杂助催化剂MoS₂的协同作用，Ni_0.08-MoS₂/ZnIn₂S₄表现出最高的产氢速率，为7.13 mmol·h^-1·g^-1，是ZnIn₂S₄的12.08倍。本研究通过表面空位和掺杂的协同效应以及异质结的优化，为提高光催化效率提供了一条新策略。更多还原

【Abstract】 Photocatalytic hydrogen production is one of the effective ways to address environmental pollution and energy crises.Herein,Ni_x-MoS₂/ZnIn₂S₄ heterojunctions were constructed to improve the separation efficiency of photogenerated electrons and holes and increase the number of active sites for hydrogen evolution.According to the catalyst characterization and theoretical calculations,the Ni at the interface between Ni_x-MoS₂ and ZnIn₂S₄ can act as a bridge for charge transfer,the Ni―S bond is the active site for H₂O dissociation,and the S site near the S vacancy on the Ni_x-MoS₂ surface enhances the hydrogen evolution reaction.Benefiting from the synergistic effect of the S vacancy and the Ni-doped MoS₂ cocatalyst,the optimal Ni_0.08-MoS₂/ZnIn₂S₄ exhibited the best hydrogen production rate of 7.13 mmol·h^-1·g^-1,which is 12.08 times than that of ZnIn₂S₄.This work provides a new strategy for enhancing photocatalytic efficiency through the synergistic effect of surface vacancies and doping and the optimization of heterojunctions.更多还原