摘要
采用一步水热法成功制备了MoS_(2)/Ni_(3)S_(2)@NF异质结催化剂.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)对所制备电极的物相和微观形貌进行表征,表面粗糙的核壳MoS_(2)/Ni_(3)S_(2)异质结均匀紧密地分布在镍网(NF)表面.在1 mol·L^(-1)的KOH电解液中,运用线性扫描伏安测试(LSV)、电化学交流阻抗(EIS)、计时电位和计时电流等方法对电极的电催化析氧(OER)性能进行了测试.结果表明,驱动10 mA·cm^(-2)电流密度,仅需134 mV过电势;其Tafel斜率为55.2 mV·dec^(-1);经过15 h计时电位测试,电流密度保持率高达93.5%.在300、400、500 mA·cm^(-2)电流密度连续测试45 h的结果耐久性表明,MoS_(2)/Ni_(3)S_(2)@NF具有较好的大电流密度工作耐久性.
MoS_(2)/Ni3S_(2)@NF hybrid catalysts were synthesized by a facile hydrothermal method for efficient alkaline oxydrogen evolution reaction(OER),which using nickel foam(NF)as both catalyst support and nickel source.The phase analysis and microstructure characterization of the electrodes were carried out by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The core-shell heterogeneous MoS_(2)/Ni_(3)S_(2)junction with rough surface were uniformly and tightly distributed on NF.The electrocatalytic performance for OER performance of electrodes were investigated in alkaline solution(1 mol·L^(-1)KOH)by electrochemical measures,such as line sweep voltammetry(LSV),eletrochemical impednance spectroscopy(EIS),chronopotentiometry and chronoamperometry.The results showed that at a current density of 10 mA·cm^(-2),MoS_(2)/Ni3S_(2)@NF electrode presented a low overpotential of 134 mV,and its corresponding Tafel slope was 55.2 mV·dec^(-1).Moreover,after 15 hours chronopotentiometriy test,the current density of MoS_(2)/Ni3S_(2)@NF kept above 93.5%.Chronoamperometry of three constant current densities(300,400,500 mA·cm^(-2))was continuous tested for 45 hours,which suggested its excellent durability.
作者
卫学玲
包维维
艾桃桃
蒋鹏
邹祥宇
WEI Xue-ling;BAO Wei-wei;AI Tao-tao;JIANG Peng;ZOU Xiang-yu(School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第2期349-355,共7页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学青年基金(51504147)
陕西理工大学校级项目(SLGKY2007)。
