Ni掺杂构建电子桥及激活MoS2惰性基面增强光催化分解水产氢
Construction of Electron Bridge and Activation of MoS2 Inert Basal Planes by Ni Doping for Enhancing Photocatalytic Hydrogen Evolution
胡琴 1陈柳云 1谢新玲 1秦祖赠 1纪红兵 2苏通明1
作者信息
- 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. 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;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
- 折叠
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Nix-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,Nix-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Nix-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,Ni0.08-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.
Abstract
Photocatalytic hydrogen production is one of the effective ways to address environmental pollution and energy crises.Herein,Nix-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 Nix-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 Nix-MoS2 surface enhances the hydrogen evolution reaction.Benefiting from the synergistic effect of the S vacancy and the Ni-doped MoS2 cocatalyst,the optimal Ni0.08-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.
关键词
Photocatalytic/Hydrogen/ZnIn2S4/MoS2/DopingKey words
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出版年
2024
国家科技期刊平台
NSTL
万方数据