离子膜电解槽用纳米Ni-Mo合金阴极的制备及其催化析氢性能  

The preparation of nano-Ni-Mo alloy cathodes for ion-exchange membrane electrolyzers and their catalytic hydrogen evolution property

作　　者：张卫国[1] 王飙[1] 刘春松[1] 张溪[1] 姚素薇[1] 

机构地区：[1]天津大学化工学院杉山表面技术研究室,天津300072

出　　处：《氯碱工业》2006年第12期12-14,共3页Chlor-Alkali Industry

基　　金：天津市自然科学基金资助项目(No.033602411);天津市科技攻关项目(No.023106111)

摘　　要：采用正交实验法确定了电沉积N i-Mo合金的最佳工艺。通过测试N i-Mo合金在模拟氯碱工业离子膜电解槽工艺条件下的阴极极化曲线,考察了N i-Mo合金电极的催化析氢性能。结果表明,当电流密度为3.0kA/m2时,N i-Mo合金电极的析氢过电位较镀镍电极降低约400 mV,反应活化能仅为24.89 kJ/mol。扫描电镜观察到N i-Mo合金电极表面微观粗糙,X射线衍射测试结果表明,所制备的N i-Mo合金为纳米晶结构,平均晶粒尺寸为2.25 nm。The optimum process for Ni -Mo alloy electrodeposition was found by orthogonal experiments. The catalytic hydrogen evolution property of the Ni - Mo alloy electrodes were investigated by measuring their cathodic polarization curves under the simulated process conditions of chlor - alkali ion - exchange membrane electrolyzers. The results showed that when the current density was 3.0 kA/m^2 the hydrogen evolution overpotential of the Ni - Mo alloy was about 400 mV lower than that of nickel plating electrode, and the reaction activation energy was as low as 24.89 kJ/mol. Scanning electron mieroscrope showed that the surface of Ni - Mo alloy electrodes was microrough. The X - ray diffraction results that the prepared Ni -Mo alloy had nanocrystalline structure with the average particle size of 2.25 nm.

关 键 词：电沉积 纳米Ni—Mo合金 催化析氢 离子膜电解槽 

分 类 号：TQ114[化学工程—无机化工]