Oxygen-contained amorphous MoS_(x) cocatalyst by one-step photodeposition to enhance H-adsorption affinity for efficient photocatalytic H_(2)generation

作     者：Pinsi Deng Ping Wang Xuefei Wang Feng Chen Huogen Yu Pinsi Deng;Ping Wang;Xuefei Wang;Feng Chen;Huogen Yu

作者机构：School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Laboratory of Solar FuelFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第7期

页      面：8977-8986页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(No.22178275) the Natural Science Foundation of Hubei Province of China(No.2022CFA001). 

主　　题：CdS photocatalytic hydrogen evolution cocatalyst oxygen-contained amorphous MoS_(x)(a-MoOS_(x)) atomic hydrogen adsorption 

摘      要：Traditional bulk MoS_(2) as an effective H_(2)-evolution cocatalyst is mainly subjected to the weak hydrogen-adsorption ability of highporpotion saturated S,resulting in a slow interfacial H_(2)-evolution reaction.In this paper,an efficient strategy for enhancing hydrogen adsorption of saturated S by manipulating electron density through O atoms is proposed to boost photocatalytic performance of CdS.Simultaneously,amorphization of MoS_(2) can further increase the unsaturated active S sites.Herein,oxygencontained amorphous MoS_(x)(a-MoOS_(x))nanoparticles(10-30 nm)were tightly loaded on the CdS surface through a mild photoinduced deposition method by using(NH_(4))_(2)[MoO(S_(4))_(2)]solution as the precursor at room temperature.The photocatalytic H_(2)-evolution result showed that the a-MoOS_(x)/CdS performed the superior H_(2)-production activity(382μmol·h^(-1),apparent quantum efficiencies(AQE)=11.83%)with a lot of visual H_(2)bubbles,which was 54.6,2.5,and 5.1 times as high as that of CdS,MoS_(x)/CdS,and annealed a-MoOS_(x)/CdS,respectively.Characterizations and density functional theory(DFT)calculations revealed the mechanism of improved H_(2)-evolution activity is that the O heteroatom in amorphous MoOS_(x) can enhance the atomic H-adsorption ability by manipulating the electron density to form electron-deficient S^((2-δ)-)sites.This study provides a new idea to improve the efficiency and number of H_(2)-evolution active sites for developing efficient cocatalysts in the field of photocatalytic hydrogen evolution.