摘要
通过简单的三步水热法实现尖晶石型过渡金属硫化物CuCo_(2)S_(4)与MoS_(2)的复合,以三维多孔泡沫镍(NF)为基底,制得自支撑催化电极MoS_(2)@CuCo_(2)S_(4)-Ni3S_(2)/NF.高分辨透射电子显微镜(HRTEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)表征结果表明,MoS_(2)纳米片层密集均匀地生长在CuCo_(2)S_(4)-Ni3S_(2)纳米棒表面,并形成多级核壳结构.其碱性条件下(1 mol/L KOH)的电催化析氢性能研究结果表明,MoS_(2)与CuCo_(2)S_(4)的复合和特殊形貌的构筑有效提高了电化学活性面积和电子传导效率,达到10,100和300 mA/cm^(2)电流密度分别仅需116,231和282 mV的过电位,经2000次循环伏安扫描后,100 mA/cm^(2)电流密度所对应的过电位仅增大6%,展现出优异的电催化析氢催化活性及较好的稳定性.
The heterostructure construction between thiospinel transition metal sulfide CuCo_(2)S_(4)and MoS_(2)was achieved by a simple three-step hydrothermal process.Ni foam(NF)was employed as the substrate and the self-supported MoS_(2)@CuCo_(2)S_(4)-Ni3S_(2)/NF electrode was obtained.The high resolution transmission electron mi⁃croscopy(HRTEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron mi⁃croscopy(SEM)and transmission electron microscopy(TEM)verified that MoS_(2)nanosheets grown onto the sur⁃face of CuCo_(2)S_(4)-Ni3S_(2)nanorods densely and uniformly,which formed a hierarchical core-shell structure.The electrocatalytic performance of MoS_(2)@CuCo_(2)S_(4)-Ni3S_(2)/NF for hydrogen evolution reaction(HER)in 1 mol/L KOH verified that the rational hybridization between MoS_(2)and CuCo_(2)S_(4)as well as the construction of the specific nanostructure significantly increased the electrochemical surface area and efficiently improved the electron transfer.Therefore,MoS_(2)@CuCo_(2)S_(4)-Ni3S_(2)/NF only needed overpotential of 116,231,282 mV,respectively,to reach the current density of 10,100,300 mA/cm^(2).The overpotential corresponded to 100 mA/cm^(2)only in⁃creased 6%after 2000 cycles of CV measurement.Therefore,outstanding HER catalytic activity and stability have been achieved by this MoS_(2)@CuCo_(2)S_(4)-Ni3S_(2)/NF self-supported electrode.
作者
张楠
韩阔
李悦
王春茹
赵凤
韩冬雪
牛利
ZHANG Nan;HAN Kuo;LI Yue;WANG Chunru;ZHAO Feng;HAN Dongxue;NIU Li(State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum,Beijing 102249,China;Center for Advanced Analytical Science,c/o School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第4期1307-1314,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:22002187)资助.
关键词
二硫化钼
尖晶石型过渡金属硫化物
电催化
析氢反应
Molybdenum disulfide
Thiospinel transition metal sulfide
Electrocatalysis
Hydrogen evolution reaction
作者简介
联系人:张楠,女,博士,讲师,主要从事纳米材料电催化研究.E-mail:zhangnan@cup.edu.cn;联系人:韩冬雪,女,博士,教授,主要从事光电敏感材料制备、光电化学传感及分析仪器设计研究.E-mail:dxhan@gzhu.edu.cn。
