钛基镍-铁合金电极的制备及其析氢性能  

Preparation of nickel-iron alloy electrode on titanium substrate and its hydrogen evolution performance

作　　者：闫巍[1] 余智勇[1] 周亚欢 王磊[1] 张碧航[2] YAN Wei YU Zhi-yong ZHOU Ya-huan WANG Lei ZHANG Bi-hang(Huaneng Cleaning Energy Research Institute, Beijing 102209, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209 [2]苏州竞立制氢设备有限公司,江苏苏州215168

出　　处：《电镀与涂饰》2016年第21期1097-1102,共6页Electroplating & Finishing

基　　金：基金项目:高效水电解制氢技术和电化学法处理工业有机废水技术的开发(CERI/TY-CA-004-15B)

摘　　要：采用恒电位电沉积法,在钛板上制备Ni-Fe合金电极。通过测量Ni-Fe合金电极在1 mol/L NaOH溶液中的阴极极化曲线,讨论了电沉积液中FeSO_4·7H_2O质量浓度、电沉积电位和时间对Ni-Fe合金电极析氢性能的影响,得到电沉积的最优工艺条件为:NiSO_4·6H_2O 100 g/L,FeSO_4·7H_2O 15 g/L,H_3BO_3 20 g/L,抗坏血酸5 g/L,十二烷基硫酸钠1 g/L,pH=3.5,温度25℃,电位-1.3 V(相对于饱和甘汞电极),时间30 s。当电流密度为0.05 A/cm^2时,Ni-Fe合金电极在1 mol/L NaOH溶液中的析氢过电位比Ni电极低23%。Ni-Fe合金电极表面比Ni电极表面粗糙,其表面的Ni、Fe含量比约为2:3。Ni-Fe alloy electrode was prepared by potentiostatic electrodeposition using titanium plate as substrate. The effects of mass concentration of FeSOa＇7H20 in plating bath, electrodeposition potential and time on hydrogen evolution performance on the Ni-Fe alloy electrode were studied through measuring the cathodic polarization curves in 1 mol/L NaOH solution. The optimal electrodeposition conditions are： NiSO4＂6H20 100 g/L, FeSO4＇ 7H20 15 g/L, H3BO3 20 g/L, ascorbic acid 5 g/L, sodium dodecyl sulfate 1 g/L, pH 3.5, temperature 25℃, electrodeposition potential -1.3 V （vs. saturated calomel electrode）, and time 30 s. At a current density of 0.05 A/cm2, the hydrogen evolution overpotential on Ni-Fe alloy electrode in 1 mol/L NaOH solution is ca.23% lower than that on Ni electrode. The surface of Ni-Fe alloy electrode has a Ni/Fe ratio of 2：3 and is rougher than that of Ni electrode.

关 键 词：镍-铁合金 钛板 电沉积 析氢 过电位 

分 类 号：TQ153.2[化学工程—电化学工业]