摘要: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20 nm)的溶液(pH=6)中,电沉积制备了Ni—W/Zr02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/Zr02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。 关键词:镍一钨合金;二氧化锆;纳米复合电极;电沉积;催化析氢 中图分类号:TQl53 文献标志码:A 文章编号:1004—227X(2009)02—0001—03 Study of hydrogen evolution on nickel-tungsten/ zirconia nanocomposite electrode//YAO Su—wei*,YAO Yin9—wu,ZHANG Wei—gu0,WANG Hong-zhi Abstract:A Ni—W/zr0,nanocomposite electrode was prepared by electrodeposition from a bath containin9 20 9/L nickel sulfate,45 9/L sodium tungstate,50 9/L complexing agent and l 0 9/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/Zr0, nanocomposite electrode has better hydrogen evolution activity and stability than Ni—W alloy electrode. Keywords:nickel——tungsten alloy;zirconia;nanocomposite electrode;electrodeposition;catalytic hydrogen evolution First-author’S address:Sugiyama Laboratory of Surface Technology,School ofChemical Engineering and Technology, Tianjin University,Tianjin 300072,China 1 前言 氢能是一种高效、洁净的二次能源,人们一直希望用它来替代煤、石油等矿物燃料,以缓解能源短缺与环境污染问题。电解水制氢是生产氢气的重要手段,降低氢在阴极上的析出过电位以减少制氢成本,是电化学工作者长期的研究方向。因此,研制廉价、具有高电化学催化活性的电极材料具有重要的现实意义与应用价值。 注:本站部分资料需要安装PDF阅读器才能查看,如果你不能浏览文章全文,请检查你是否已安装PDF阅读器! |