掺杂球形氢氧化镍的循环伏安特性  

STUDY ON CYCLIC VOLTAMMETRY CHARACTERISTICS OF DOPING Ni(OH)_2

作　　者：刘建华[1] 杨敬武[1] 唐致远[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2000年第1期118-121,共4页Journal of Tianjin University：Science and Technology

摘　　要：采用循环伏安法研究了Ni(OH)2粉末微电极,认为Ni(OH)2粉末微电极电化学过程是一个准可逆过程且电极反应在Ni(OH)2NiOOH之间进行;研究了阳极过程中掺杂元素对Ni(OH)2质子扩散系数的影响,发现掺Co后比纯Ni(OH)2的扩散系数提高近1倍,而掺Zn后则扩散系数有所降低.掺Co和Zn后Ni(OH)2电极氧的析出电位均比纯Ni(OH)2的氧的析出电位有所提高.The cyclic voltammetry was used to study the powder microelectrode of Ni(OH) 2.It was demonstrated that the electrochemical process of the Ni(OH) 2 microelectrode was a pseudo reversible one,and the electrode reaction proceeded between Ni(OH) 2 and NiOOH.The effects of the additive elements Co and Zn on the proton diffusion coefficients in the anodic process were investigated.The experimental results showed that addition of Co approximately doubled the proton diffusion coefficient than pure Ni(OH) 2,while addition of Zn would slightly decrease the coefficient.However,oxygen evolution potentials of the microelectrodes of Ni(OH) 2 doped with Co and Zn were a little higher than that of pure Ni(OH) 2.

关 键 词：微电极 循环伏安 氢氧化镍 球形 掺杂 电极反应 

分 类 号：O646.54[理学—物理化学]