Ni掺杂构建电子桥及激活MoS_(2)惰性基面增强光催化分解水产氢  

Construction of Electron Bridge and Activation of MoS_(2) Inert Basal Planes by Ni Doping for Enhancing Photocatalytic Hydrogen Evolution

作　　者：胡琴 陈柳云 谢新玲[1] 秦祖赠[1] 纪红兵[1,2] 苏通明 Qin Hu;Liuyun Chen;Xinling Xie;Zuzeng Qin;Hongbing Ji;Tongming Su(Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Institute of Green Petroleum Processing and Light Hydrocarbon Conversion,College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]广西大学化学化工学院,广西石化资源加工与过程强化技术重点实验室,南宁530004 [2]浙江工业大学化学工程学院,浙江绿色石化与轻烃转化研究院,杭州310014

出　　处：《物理化学学报》2024年第11期44-44,共1页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(22208065);广西自然科学基金(2022GXNSFBA035483);广西石化资源加工及过程强化技术重点实验室开放基金(2023K012);广西八桂学者专项资金资助项目。

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)-MoS_(2)/ZnIn_(2)S_(4)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)-MoS_(2)与ZnIn_(2)S_(4)界面处的Ni可作为电荷转移的桥梁,Ni—S键是H_(2)O解离的活性位点,并且Ni_(x)-MoS_(2)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MoS_(2)的协同作用,Ni_(0.08)-MoS_(2)/ZnIn_(2)S_(4)表现出最高的产氢速率,为7.13 mmol·h^(-1)·g^(-1),是ZnIn_(2)S_(4)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。Photocatalytic hydrogen production is one of the effective ways to address environmental pollution and energy crises.Herein,Ni_(x)-MoS_(2)/ZnIn_(2)S_(4) 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)-MoS_(2) and ZnIn_(2)S_(4) can act as a bridge for charge transfer,the Ni—S bond is the active site for H_(2)O dissociation,and the S site near the S vacancy on the Ni_(x)-MoS_(2) surface enhances the hydrogen evolution reaction.Benefiting from the synergistic effect of the S vacancy and the Ni-doped MoS_(2) cocatalyst,the optimal Ni_(0.08)-MoS_(2)/ZnIn_(2)S_(4) exhibited the best hydrogen production rate of 7.13 mmol·h^(-1)·g^(-1),which is 12.08 times than that of ZnIn_(2)S_(4).This work provides a new strategy for enhancing photocatalytic efficiency through the synergistic effect of surface vacancies and doping and the optimization of heterojunctions.

关 键 词：Ni掺杂 电荷转移 助催化剂 能源危机 活性位点 催化剂表征 光催化产氢 异质结 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] TQ116.2[化学工程—无机化工]