镍在碱溶液中阳极氧化膜的拉曼光谱  

Raman spectroscopic study of anodic oxide filmon nickel in alkaline solution

作　　者：翟大程 王建平[1] 江志裕[1] 周伟舫[1] 

机构地区：[1]复旦大学化学系

出　　处：《复旦学报（自然科学版）》1994年第6期685-692,共8页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金;中国科学院金属腐蚀与防护开放实验室资助

摘　　要：利用拉曼光谱方法研究了Ｎｉ在１ｍｏｌ．Ｌ－１ＮａＯＨ溶液中阳极氧化膜的性质·结果表明，在电极电位（相对于与研究体系同浓度碱溶液的Ｈｇ／ＨｇＯ电极）为０．５５Ｖ时，表面氧化膜为β－ＮｉＯＯＨ．在０．３Ｖ和－０４Ｖ时，虽然大部分β－ＮｉＯＯＨ已被还原成β－Ｎｉ（ＯＨ）２，但表面层的最外层可能是ＮｉＯ薄层．在电位阶跃的同时，记录表面拉曼光谱的变化．在β－ＮｉＯＯＨ膜的阴极还原时，光谱变化缓慢，可以认为，反应起始于β－ＮｉＯＯＨ／Ｎｉ界面或膜内部．在β－Ｎｉ（ＯＨ）２膜及表层ＮｉＯ的阳极氧化时，光谱很快地发生变化，反应很可能是从溶液／表面膜界面开始的．The anodic oxide film on nickel in I mol.L-1 NaOH solution has beenstudied using laser Raman spectroscopy.The results show that at +0.55 V(vs. Hg/HgO),the surface oxide film is of β-NiOOH,at -0.4 V and +0.3 V,most of the β-NiOOH film is reduced to β-Ni(OH)2,but the outmost layer maybe of NiO.The change of surface Raman spectra as the potential step jumptakes place is recorded.When the β-NiOOH film is being cathodically reducedthe change is slowly.We may think that the reduction of the β-NiOOH film occurs first at the interface of β-NiOOH/Ni or from inside of the oxide film. TheRaman spectra of the film changes instantly when the anodic oxidation ofβ-Ni(OH)2 and NiO film takes place.The oxidation reaction is likely to occurfirst at the solution/β-Ni(OH)2 interface.

关 键 词：镍 散射谱 碱溶液 阳极氧化膜 

分 类 号：O614.813[理学—无机化学]