彭文屹,朱峰,邓晓华,陶钧,周颖钰.电沉积工艺参数对镍-钼-锌三元合金电极析氢催化性能的影响[J].表面技术,2020,49(1):173-179.
PENG Wen-yi,ZHU Feng,DENG Xiao-hua,TAO Jun,ZHOU Ying-yu.Effect of Electrodeposition Process Parameters on Catalytic Performance of Ni-Mo-Zn Ternary Alloy Electrode for Hydrogen Evolution.Surface Technology,2020,49(1):173-179.
电沉积工艺参数对镍-钼-锌三元合金电极析氢催化性能的影响
Effect of Electrodeposition Process Parameters on Catalytic Performance of Ni-Mo-Zn Ternary Alloy Electrode for Hydrogen Evolution
投稿时间:2019-04-17  修订日期:2020-01-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.01.020
中文关键词:  Ni-Mo-Zn合金镀层  析氢催化性能(HER)  电催化  电沉积  非晶
英文关键词:electrolysis of water  hydrogen evolution reaction (HER)  electro-catalysis  electrodeposition  amorphous
基金项目:国家自然科学基金(51461030,51501085)
作者单位
彭文屹 南昌大学 a.材料科学与工程学院,南昌 330031 
朱峰 南昌大学 a.材料科学与工程学院,南昌 330031 
邓晓华 南昌大学 b.空间科学技术研究院,南昌 330031 
陶钧 南昌大学 a.材料科学与工程学院,南昌 330031 
周颖钰 南昌大学 a.材料科学与工程学院,南昌 330031 
AuthorInstitution
PENG Wen-yi a.School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China 
ZHU Feng a.School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China 
DENG Xiao-hua b.Institute of Space Science and Technology, Nanchang University, Nanchang 330031, China 
TAO Jun a.School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China 
ZHOU Ying-yu a.School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China 
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中文摘要:
      目的 采用直流电沉积法在铜基底上制备镍-钼-锌三元合金电极,提高电解水析氢过程中阴极电极的效率。方法 使用电化学工作站研究不同电沉积工艺参数对镍-钼-锌三元合金镀层析氢性能的影响,使用扫描电镜(SEM)、X射线衍射分析仪(XRD)、能谱仪(EDS)对合金镀层表面形貌、相结构及元素含量进行表征。通过线性扫描伏安法(LSV)对析氢过电位进行测量,采用塔菲尔极化获得塔菲尔斜率,采用电化学阻抗法(EIS)表征合金镀层的析氢催化性能。结果 最佳工艺参数为:温度45 ℃,pH=10.5,电流密度100 mA/cm2。该合金在10 mA/cm2下相对氢标电位仅为139 mV,塔菲尔斜率为103 mV/dec,活化电极电阻(Rct)随着电压的升高而降低。合金中Ni、Mo和Zn的原子比分别为68.23%、10.09%和21.68%。合金镀层为非晶结构,表面是纳米级颗粒堆叠而成的粗糙形貌。结论 不同的工艺参数对Ni-Mo-Zn电极析氢性能有着重大影响,其析氢性能随着pH值的升高而上升,随着电流密度的升高而先增后减,随着电沉积温度的升高而上升。Ni-Mo-Zn高的析氢性能源于其元素协同作用、非晶结构和粗糙表面。
英文摘要:
      The work aims to prepare Ni-Mo-Zn ternary alloy electrode on copper base by direct current electrodeposition, so as to improve the efficiency of cathode electrode in hydrogen evolution reaction of electrolytic water. The effects of different electrodeposition process parameters on the hydrogen evolution performance of nickel-molybdenum-zinc ternary alloy coatings were investigated. Scanning electron microscope energy, dispersive spectrometer and X-ray diffractometer were used to characterize the morphology, phase structure and element composition of the coatings. The hydrogen evolution overpotential was measured by linear sweep voltammetry (LSV), the Tafel slope was obtained by Tafel polarization, and the hydrogen evolution catalytic performance of the alloy coating was characterized by electrochemical impedance spectroscopy (EIS). The optimum process parameters were temperature of 45 ℃, pH=10.5 and current density of 100 mA/cm2. The relative hydrogen standard potential of the alloy was only 139 mV at 10 mA/cm2. Meanwhile the Tafel slope was 103 mV/dec and the activation electrode resistance (Rct) decreased as the voltage increased. The atomic ratios of nickel, molybdenum and zinc were 68.40%, 9.54% and 22.06%, respectively. The microstructure was amorphous and the surface was rough due to stacking of nano-scale particles. Different process parameters have a significant impact on the hydrogen evolution performance of Ni-Mo-Zn electrode, which show that the hydrogen evolution reaction of Ni-Mo-Zn increased first and then decreased with the increase the pH value and the current density, but increased with the increase of temperature monotonously, respectively. Ni-Mo-Zn has a high hydrogen evolution reaction performance due to its amorphous structure, elemental synergy and rough surface.
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