p型单晶硅上电镀纳米Ni-W-P合金电极及其光照析氢研究  

Electrodeposition of Nanocrystal Ni-W-P Alloy on p-Si Electrode and Its Hydrogen Evolution Under Illumination

作　　者：张卫国[1] 姚素薇[1] 赵转清[1] 龚正烈[2] 

机构地区：[1]天津大学化工学院应用化学系,天津300072 [2]天津理工学院

出　　处：《应用化学》2001年第10期790-793,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目 ( 698780 2 1)

摘　　要：通过电化学方法在半导体 p型硅上沉积 Ni-W-P合金 ,制备出具有高催化析氢活性的纳米金属 /半导体电极 .考察了电沉积工艺条件对电极催化析氢性能的影响 ,用扫描电镜 (SEM)观察了电极的表面形貌 .结果表明 ,随着镀液 p H值增加、温度升高 ,Ni-W-P合金镀层结构由晶态向非晶态转变 .在 5 0℃ ,p H=6,电流密度为 1 5 A/dm2 时 ,获得了纳米晶 Ni-W-P合金 。The nanocrystal Ni W P/p Si electrodes with high catalytic activity for hydrogen evolution were prepared by electrodeposition of Ni W P alloy on p Si. The effects of electroplating conditions on the catalytic activity of electrodes have been investigated, and the surface morphology and structure of the electrodes were investigated by SEM and X ray diffraction. The result showed that the structure of Ni W P alloy deposit changes from crystal to amorphous state with the increase of pH and temperature of electroplating solution. The nanocrystal Ni W P alloy was obtained at electroplating conditions of 50 ℃, pH=6 and current density 15 A/dm 2. The catalytic activity of the electrode for hydrogen evolution under illumination was studied.

关 键 词：半导体 纳米晶Ni-W-P合金 催化析氢 p型单晶硅 催化活性 电镀 水 光解 催化剂 氢气 镍钨磷合金电极 

分 类 号：TQ116.21[化学工程—无机化工] O646.5[理学—物理化学]