镍-钨/二氧化锆纳米复合电极析氢性能的研究

Study of hydrogen evolution on nickel–tungsten/zirconia nanocomposite electrode

在含有20g/L硫酸镍、45g/L钨酸钠、50g/L配位剂和10g/L二氧化锆(粒径约20nm)的溶液(pH=6)中,电沉积制备了Ni–W/ZrO2纳米复合电极。通过电化学方法研究了该纳米复合电极在质量分数为30%的NaOH溶液中的催化析氢性能,并与Ni–W合金电极进行了对比。利用扫描电镜观察了电极的表面形貌。结果表明,Ni–W/ZrO2纳米复合电极的催化析氢活性及稳定性均优于Ni–W合金电极。

A Ni-W/ZrO2 nanocomposite electrode was prepared by electrodeposition from a bath containing 20 g/L nickel sulfate, 45 g/L sodium tungstate, 50 g/L complexing agent and 10 g/L zirconia （particle size ca.20 nm） at pH 6. Its catalytic hydrogen evolution behavior was studied by electrochemical measurements in a 30% （mass fraction） NaOH solution, and its surface morphology was observed with SEM. The results showed that the Ni-W/ZrO2 nanocomposite electrode has better hydrogen evolution activity and stability than Ni-W alloy electrode.