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	三乙醇胺在金属电沉积中的基本效应; The Fundamental EFFects of Triethanolamine in the Electrodeposition of Metals
	蔡加勒 ; 周绍民
	1994
关键词	三乙醇胺 吸附 表面活性配合物 阻化作用 Triethanolamine Adsorption SurFace-active coordination compound Inhibition
英文摘要	用微分电容法、极谱法、原位表面增强拉曼光谱法和微盘电极法研究了碱性溶液中存在和不存在zn-（2＋）、Cd-（2＋）、Cu-（2＋）、nI-（2＋）、fE-（3＋）和Sn-（4＋）等离子时三乙醇胺（TElA）在电极/溶液界面上的电化学行为。结果表明，TElA以平卧方式吸附，符合fruMkIn吸附等温线。在碱性溶液中TElA与zn-（2＋）、Cd-（2＋）、Cu-（2＋）、nI-（2＋）和fE-（3＋）等离子生成具有表面活性的混合配体配合物，其吸附性较TElA的强。TElA不同程度地影响上述金属离子的电还原过程，根据实验结果提出TElA对锌电沉积的阻化作用机制及其基本效应。; The behaviour of triethanolamine(TELA) at electrode/solution interFace in alkaline solution with and without Zn2+、Cd2+、Cu2+、Fe3+ and Sn4+ ions has been studied by means of diFFerential capacity,polarography,in-situ surFace-enhanced Raman spectroscopy(SERS)and microdisc electrodes.The inFluence of TELA on the discharging process of above ions and the inhibition of TELA on the electrodeposition of zinc have been studied.The results are summarized as Follows:TELA has a stronger adsorptivity at the Hg(or Ag)/solution interFace and adsorbs with·lat" orientation on Ag electrode at the potential of maximum adsorption(～-0.60 V).TELA adsorption on Hg electrode obeys the Frumkin isotherm and possesses a linear relationship between(Ep-Em)2 and lgCTELA.Mixed ligand coordination compounds of metallic ions(such as Zn2+,Cd2+,Cu2+,Ni2+ and Fe3+) with TELA and OH- ions are Formed,and these coordination compounds are surFace-active.Their adsoption activities on Hg electrode are Ni(Ⅱ)>Fe(Ⅲ),Cu(Ⅱ)>Zn(Ⅱ)>Cd(Ⅱ).TELA aFFects the electroreduction of t he above metallic ions in diFFerent degree.The inFluences of TELA are the same in the sequence as adsoption activities corresponding to mixed ligand coordination compounds,The Free energy of TELA adsorption in the presence of zinc ion has a more negative value than that in the absence of zinc ion.The interaction of adsorbed TELA molecular changes From weak repellant to weak attraction in the presence of zinc ion.The observed rate constants For zinc electrodepositon(at-1.400 V)reduce according to the increase of TELA concentration,and its inhibitive mechanism can be expressed by ks=k0(1-θ)+k1θ; 国家自然科学基金
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/107584]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	蔡加勒,周绍民. 三乙醇胺在金属电沉积中的基本效应, The Fundamental EFFects of Triethanolamine in the Electrodeposition of Metals[J],1994.
APA	蔡加勒,&周绍民.(1994).三乙醇胺在金属电沉积中的基本效应..
MLA	蔡加勒,et al."三乙醇胺在金属电沉积中的基本效应".(1994).

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