摘要
为开发用于工业化制氢的低成本、高效且稳定的非贵金属析氢材料,采用电沉积法在铜片(Cu)上原位构筑球形Ni-Mo-RE(RE=Eu、Tb、Gd)稀土复合镀层,制备了Ni-Mo-RE/Cu析氢材料。采取SEM、EDS、XRD、TEM、XPS考察了沉积电压和稀土种类对Ni-Mo-RE/Cu析氢材料微观形貌和结构组成的影响。评价了其在浓度为1 mol/L的KOH水溶液中电解水析氢(HER)活性,探究了不同沉积电压、不同稀土种类制备的Ni-Mo-RE/Cu析氢材料的线性伏安曲线、电化学阻抗谱和循环伏安(CV)曲线等电化学性能,以及CV法和计时电流法测试的稳定性。结果表明,稀土种类(Eu、Tb、Gd)和沉积电压对Ni-Mo-RE/Cu析氢材料的表面形貌有显著影响;沉积电压–1.08 V制备的Ni-Mo-Eu/Cu表面形成了尺寸均匀的球形颗粒,并形成大量的孔洞结构;在10 mA/cm^(2)电流密度下,Ni-Mo-Eu/Cu过电位为45 mV,电荷转移电阻为0.2497Ω/cm^(2),电化学活性面积为1475 cm^(2)/g,表现出最好的析氢活性;1000圈CV测试后,Ni-Mo-Eu/Cu过电位48 mV与初始过电位(45 mV)相比变化<10%,100 h持续电解后,其仍能保持稳定。
In order to develop low-cost,efficient,and stable non-precious metal hydrogen evolution materials for industrial hydrogen production,Ni-Mo-RE/Cu hydrogen evolution materials were prepared by in-situ depositing the spherical rare earth composites Ni-Mo-RE(RE=Eu,Tb,Gd)on copper sheet(Cu)via simple electrodeposition method.The effects of deposition voltage and rare earth species on the morphology and structure of Ni-Mo-RE/Cu hydrogen evolution materials were analyzed by SEM,EDS,XRD,TEM and XPS.Their hydrogen evolution(HER)activity in 1 mol/L KOH aqueous solution was evaluated,while the linear voltammetry curves,electrochemical impedance spectroscopy and cyclic voltammetry(CV)curves of Ni-Mo-RE/Cu hydrogen evolution materials prepared by different deposition voltages and different rare earth types as well as the stability of cyclic voltammetry and chronoamperometry were further investigated.The results showed that rare earth species(Eu,Tb,Gd)and deposition voltage had significant effects on the surface morphology of Ni-Mo-RE/Cu hydrogen evolution materials.The surface of Ni-Mo-Eu/Cu prepared at deposition voltage of–1.08 V formed spherical particles with uniform size and a large number of pores.At a current density of 10 mA/cm^(2),the Ni-Mo-Eu/Cu showed an overpotential of 45 mV,a charge transfer resistance of 0.2497Ω/cm^(2),and an electrochemical active area of 1475 cm^(2)/g,while exhibited high hydrogen evolution activity.After 1000 cycles of voltammetry,the change in Ni-Mo-Eu/Cu overpotential(48 mV)was less than 10%when compared with the initial overpotential(45 mV),and remained stable after 100 h continuous electrolysis.
作者
袁美玲
陈必清
景欣欣
翟佳鑫
YUAN Meiling;CHEN Biqing;JING Xinxin;ZHAI Jiaxin(College of Chemistry,Qinghai Normal University,Xining 810000,Qinghai,China)
出处
《精细化工》
北大核心
2025年第9期1960-1967,2037,共9页
Fine Chemicals
基金
国家自然科学基金项目(22062020)。
关键词
析氢反应
电沉积
稀土
铜
催化剂
功能材料
hydrogen evolution reaction
electrodeposition
rare earth
copper
catalysts
functional materials
