电沉积制备镍-铁-钨合金析氢电极的工艺研究

以紫铜片为基体电沉积制备了Ni–Fe–W合金电极。研究了镀液中不同组分的浓度和工艺条件对Ni–Fe–W合金析氢性能的影响,得到最佳镀液配方和工艺条件为:NiSO4·6H2O80g/L,FeSO4·7H2O20g/L,Na2WO4·2H2O0.020mol/L,Na3C6H5O7·2H2O 0.5 mol/L,H3BO3 0.65 mol/L,Na2SO4 0.1 mol/L,十二烷基硫酸钠0.1 g/L,pH 5~6,温度30°C,电流密度4 A/dm2,磁力搅拌800 r/min,时间30 min。在该条件下所得Ni–Fe–W合金电极表面Ni、Fe和W的原子分数为63.79%、34.35%和1.86%,具有较大的比表面积,在30%KOH溶液中的析氢催化活性较好。

Study on electrodeposition of nickel iron tungsten alloy electrode for hydrogen evolution

Ni–Fe–W alloy electrode was prepared using red copper sheet as substrate by electrodeposition.The effects of concentrations of different constituents in bath and process parameters on catalytic property of the Ni–Fe–W alloy electrode for hydrogen evolution were studied.The bath composition and process conditions were optimized as follows:NiSO4·6H2O 80 g/L,FeSO4·7H2O 20 g/L,Na2WO4·2H2O 0.020 mol/L,Na3C6H5O7·2H2O 0.5 mol/L,H3BO30.65 mol/L,Na2SO40.1 mol/L,sodium dodecyl sulfate 0.1 g/L,pH 5-6,temperature 30°C,current density 4 A/dm2,magnetic agitation 800 r/min,and time 30 min.The atom fractions of Ni,Fe,and W on the surface of Ni–Fe–W alloy electrode obtained thereby were 63.79%,34.35%,and 1.86%,respectively.The said electrode had a high specific surface area and good catalytic activity for hydrogen evolution in 30%KOH solution.