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Fe(Ⅲ)/Fe(Ⅱ)在[Bmim]BF_4-FeCl_3-H_2O体系中的电化学行为 被引量：4

Electrochemical Behavior of Fe(Ⅲ)/Fe(Ⅱ) Redox Couple in [Bmim]BF_4-FeCl_3-H_2O
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摘要 采用循环伏安法研究了Fe(Ⅲ)/Fe(Ⅱ)在[Bmim]BF4-FeCl3-H2O体系中的电化学行为。研究表明,在[Bmim]BF4-FeCl3-H2O体系中只观察到Fe(Ⅲ)/Fe(Ⅱ)的氧化还原反应,没有观察到Fe(Ⅱ)/Fe的氧化还原;Fe(Ⅲ)/Fe(Ⅱ)的氧化还原反应是扩散控制的可逆过程。还原峰值电流随扫描速率增大而增大,并符合Randles-Sevcik方程。Fe(Ⅲ)在[Bmim]BF4-FeCl3-H2O体系中的扩散系数与温度的关系符合Arrhenius公式,其扩散活化能为41.432 kJ/mol。 The electrochemical behaviors of Fe（Ⅲ）/Fe（Ⅱ） redox couple in [Bmim]BF4-FeCl3-H2O system were investigated by cyclic voltammetry. The Fe（Ⅲ）/Fe（Ⅱ） rather than Fe（Ⅱ）/Fe redox reaction was ohserved in [Bmim]BF4-FeCl3-H2O system. It was found that Fe（Ⅲ）/Fe（Ⅱ） redox reaction is a diffusioncontrolled reversible process. The reduction peak current is directly proportional to the square root of scanning rate, which can be described by Randles-Sevcik equation. The relationship between diffusion coefficient and temperature agrees well with the Arrhenius equation and the diffusion activation energy of Fe（Ⅲ） in [Bmim]BF4-FeCl3-H2O system is 41. 432 kJ/mol.
作者 崔焱 华一新 李艳 裴启飞
机构地区 昆明理工大学材料与冶金工程学院
出处 《有色金属（冶炼部分）》 CAS 北大核心 2009年第3期2-6,共5页 Nonferrous Metals（Extractive Metallurgy)
基金 国家自然科学基金资助项目(50564006) 云南省自然科学基金重点项目(2005E0004Z)
关键词 Fe(Ⅲ)/Fe(Ⅱ)电对 电化学行为 [Bmim]BF4-FeCl3-H2O 离子液体 循环伏安法 Fe（Ⅲ）／Fe（Ⅱ） redox couple Electrochemical behaviors [Bmim]BF4-FeCl3-H2O Ionic liquid Cyclic voltammetry
分类号 TQ031 [化学工程]
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参考文献14

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二级参考文献22

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有色金属（冶炼部分）
2009年 第3期

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