锶改性二硫化钼自支撑电极的制备及其光电催化析氢性能  

Preparation and photoelectrocatalytic hydrogen evolution reaction property of a self-supported electrode based on Sr-modified molybdenum sulfide

作　　者：田园园 王朋涛 苗艳艳 焦鑫 马小芳 高芳 Tian Yuanyuan;Wang Pengtao;Miao Yanyan;Jiao Xin;Ma Xiaofang;Gao Fang(Key Laboratory of New Energy Functional Materials,Shanxi College of Technology,Shuozhou 036000,China)

机构地区：[1]山西工学院新能源功能材料重点实验室,山西朔州036000

出　　处：《河南师范大学学报（自然科学版）》2024年第5期59-66,I0005,共9页Journal of Henan Normal University(Natural Science Edition)

基　　金：山西省基础研究计划资助项目(202203021222328);山西省高等学校教学改革创新项目(J20221431);山西工学院科研启动经费项目(200101).

摘　　要：光电催化分解水制氢技术是制备“绿氢”的有效途径之一,开发低成本、高稳定性、高光电析氢效率的光电阴极是推动光电水解技术发展的必要途径.采用一步水热法制备了碱金属元素Sr改性的二硫化钼(MoS_(2))自支撑电极,并进行了光电水解制氢反应的应用研究.通过X射线衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、荧光发射光谱(PL)等测试对Sr改性的MoS_(2)电极的物相结构进行表征与分析.结果表明,Sr原子以SrMoO_(4)的形式进入MoS_(2)晶体结构中,使其晶格缺陷增加,从而增加了光电阴极的析氢活性位点.此外,Sr的引入同时可降低光生载流子的复合概率.通过优化Sr的加入量并对所制备的自支撑电极光电催化析氢性能进行测试,可以发现适量的Sr改性可有效提升光电催化析氢性能.其中,当Sr加入量为5%时,所制备的Sr改性MoS_(2)自支撑电极光电响应电流密度提升了20%.这种通过对MoS_(2)进行碱金属元素改性的方法,为提升非贵金属催化剂的光电催化性能的研究提供了新的借鉴.Photoelectrocatalytic hydrogen production technology represents an effective approach to synthesize of'Green Hydrogen'.It is imperative to enhance the development of low-cost,highly stable,and efficient photocathodes for advancing the progress of photoelectrocatalytic water splitting technologies.In this paper,a self-supported electrode of molybdenum sulfide(MoS_(2))modified with the alkali metal element Sr was prepared via a one-step hydrothermal method,and the utilization of photoelectrocatalytic hydrogen evolution reaction was investigated.The Sr-modified MoS_(2)electrode was characterized and analyzed using XRD,TEM,SEM,PL,etc.The results demonstrate that the incorporation of Sr atoms,in the form of SrMoO_(4),into the crystal lattice of MoS_(2)leads to an increase in lattice defects,thereby enhancing the active sites for hydrogen evolution on the photocathode.Additionally,the incorporation of Sr can effectively reduce the recombination rate of photogenerated carriers.By optimizing the addition of Sr and conducting performance tests on self-supported electrodes,it has been observed that an appropriate amount of Sr modification significantly enhances the photoelectrochemical hydrogen evolution.The photocurrent density of the self-supported electrode modified with 5%Sr was enhanced by 20%.The modification of MoS_(2)with alkali metal elements offers a novel reference for the investigation of enhancing the photoelectrochemical performance of non-precious metal catalysts.

关 键 词：锶改性 二硫化钼 光电催化析氢 水分解 

分 类 号：TQ035[化学工程]