酸性AlCl_3-BMIC离子液体中的铝阳极溶解（英文）

采用线性扫描伏安法研究了Lewis酸性AlCl3-BMIC（BMIC：1-butyl-3-methylimidazoliumchloride）离子液体中铝电极的溶解.铝电极在阳极极化时出现了钝化现象,钝化是由于在铝电极表面形成了固体AlCl3钝化膜造成的.铝的电化学溶解过程可以依次分为三个区：电化学控制区、过渡区和钝化区.在电化学控制区,铝的电化学溶解速率随着电位的正移而逐渐增加;在过渡区,由于电极表面AlCl4-和Al2Cl7-浓度发生改变而析出固体AlCl3使得铝电化学溶解速率随着电位的正移而逐渐减小;当钝化膜形成之后,铝的电化学溶解速率不再随着电位的正移而发生改变,铝溶解进入钝化区.增加...

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Bibliographic Details
Published in物理化学学报 Vol. 29; no. 5; pp. 946 - 952
Main Author 裴启飞 华一新 徐存英 张启波 李艳 汝娟坚 龚凯
Format Journal Article
LanguageChinese
Published 2013
Subjects
AlCl3-BMIC离子液体
AlCl3膜
钝化现象
铝
阳极溶解
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ISSN1000-6818

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Summary:采用线性扫描伏安法研究了Lewis酸性AlCl3-BMIC（BMIC：1-butyl-3-methylimidazoliumchloride）离子液体中铝电极的溶解.铝电极在阳极极化时出现了钝化现象,钝化是由于在铝电极表面形成了固体AlCl3钝化膜造成的.铝的电化学溶解过程可以依次分为三个区：电化学控制区、过渡区和钝化区.在电化学控制区,铝的电化学溶解速率随着电位的正移而逐渐增加;在过渡区,由于电极表面AlCl4-和Al2Cl7-浓度发生改变而析出固体AlCl3使得铝电化学溶解速率随着电位的正移而逐渐减小;当钝化膜形成之后,铝的电化学溶解速率不再随着电位的正移而发生改变,铝溶解进入钝化区.增加搅拌、升高温度、降低离子液体AlCl3摩尔分数都可以增加铝溶解阳极极限电流密度.
Bibliography:11-1892/06
Aluminum; Anodicdissolution; AICI3-BMIC ionicliquid; Passivation phenomenon;AICI3 layer
The dissolution process of an aluminum electrode in Lewis acidic ionic liquid aluminum chloride （AICI3）-l-butyl-3-methylimidazolium chloride （BMIC） was studied using linear sweep voltammetry. Passivation was observed upon anodic polarization of the aluminum electrode that was caused by formation of a solid AICI3 layer on the surface of the aluminum electrode. The electrochemical dissolution process of aluminum can be divided into electrochemically-controlled, transition, and passivation regimes. In the electrochemically-controlled regime, the dissolution rate of aluminum increased with increasing potential. In the transition regime, the dissolution rate of aluminum decreased as the potential increased because of the formation of solid AICI3 caused by changes in the concentration of AICI; and AI2CI3. After a passivation layer formed, the dissolution rate of aluminum depended on the diffusion of AICI; was independen
ISSN:1000-6818