Sn、P共掺杂MoS_(2)纳米花的制备及电催化析氢性能研究  

Preparation of Sn,P Co-doped MoS_(2)Nanoflowers and Their Electrocatalytic Hydrogen Evolution Performance

作　　者：周靓 何文远[1,2,3] 陈隆源 朱红伟 陈丽娟 凌辉 郑学军[1,2,3] ZHOU Liang;HE Wenyuan;CHEN Longyuan;ZHU Hongwei;CHEN Lijuan;LING Hui;ZHENG Xuejun(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,Hunan,China;Engineering Research Center of Complex Tracks Processing Technology and Equipment of Ministry of Education,Xiangtan University,Xiangtan 411105,Hunan,China;Key Laboratory of Welding Robot and Application Technology of Hunan Province,Xiangtan University,Xiangtan 411105,Hunan,China)

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105 [2]湘潭大学教育部复杂轨迹加工技术与装备工程研究中心,湖南湘潭411105 [3]湘潭大学湖南省焊接机器人及应用技术重点实验室,湖南湘潭411105

出　　处：《材料导报》2023年第15期16-22,共7页Materials Reports

基　　金：国家自然科学基金项目(11832016,51775471);湖南创新型省份建设专项重大标志性创新示范工程项目(2019XK2303);长沙株洲湘潭标志性工程技术项目(2020GK2014);合肥通用机械研究院有限公司项目(20213ZK)。

摘　　要：掺杂被证实是激活MoS_(2)面内析氢活性,从而提高其析氢性能的有效手段,但是大多数研究都局限于单一的金属或非金属原子掺杂。本工作通过一步水热法成功制备出一种新型的Sn、P金属-非金属原子共掺杂的MoS_(2)纳米花(Sn,P-MoS_(2))。通过XRD、Raman、XPS、SEM和EDS对材料的结构、形貌和成分进行表征,结果表明Sn和P原子成功共同掺杂进入MoS_(2)晶格且均匀分布。与纯MoS_(2)和单一的Sn金属原子或P非金属原子掺杂MoS_(2)相比,Sn,P-MoS_(2)纳米花在0.5 mol/L H 2SO 4溶液中展现出更优异的电催化析氢性能:在10 mA/cm 2的电流密度下过电位仅为277 mV,塔菲尔斜率为50.2 mV/dec。Sn,P-MoS_(2)纳米花优异的析氢性能可归因于Sn、P原子之间存在协同作用,促进了面内析氢活性位点的形成,同时减小了边缘活性位点的氢吸附自由能。这种金属和非金属原子共掺杂策略为MoS_(2)基析氢电催化剂的广泛应用提供了一条可行的途径。Heterogeneous atom doping has been proved to be an effective strategy to improve the hydrogen evolution performance,as it can activate the inert basal plane of MoS_(2).However,most of the researches have so far focused only on single metal or non-metal atomic doping to MoS_(2).In this work,a novel Sn metal atom and P nonmetal atom co-doped MoS_(2)nanoflower(Sn,P-MoS_(2))was successfully prepared by a simple one-step hydrothermal method.The structure,morphology and chemical composition of the Sn,P-MoS_(2)were characterized by X-ray diffraction(XRD),Raman,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM),and the results showed that Sn and P atoms were successfully doped and uniformly distributed in MoS_(2)lattice.Compared with pure MoS_(2)and Sn metal atom or P non-metal atom doped MoS_(2),the Sn,P-MoS_(2)nanoflowers exhibited a low overpotential of 277 mV at 10 mA/cm 2 and a small Tafel slope of 50.2 mV/dec,sho-wing superior electrocatalytic performance for hydrogen evolution reaction in 0.5 mol/L H 2SO 4 solution.The excellent performance of the Sn,P-MoS_(2)can be attributed to the synergistic interaction between Sn and P,which promotes the formation of active sites at basal plane and reduces the free energy of hydrogen adsorption at active edges.This co-doping strategy of metal and non-metal atoms provides a viable route to develop MoS_(2)-based catalysts for hydrogen evolution applications.

关 键 词：Sn、P共掺杂二硫化钼 电催化析氢 一步水热合成 活性位点 

分 类 号：O643[理学—物理化学]