氯过氧化物酶-聚L-赖氨酸/GC电极的电化学特性 |
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引用本文: | 赵雯,吴霞琴,陆中庆,后雯璟,李和兴.氯过氧化物酶-聚L-赖氨酸/GC电极的电化学特性[J].电化学,2010,16(1):65. |
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作者姓名: | 赵雯 吴霞琴 陆中庆 后雯璟 李和兴 |
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作者单位: | 上海师范大学生命与环境科学学院; |
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摘 要: | 应用电化学方法在玻碳电极上修饰聚L-赖氨酸膜,以1-乙基-(3-二甲基氨基丙基)碳二亚胺盐酸盐做交联剂,固定氯过氧化物酶.修饰电极的循环伏安曲线呈现一对可逆的氧化还原峰,表明聚L-赖氨酸能够很好地促进氯过氧化物酶在电极表面的直接电子传递,这是一个受吸附控制并伴随有质子转移的准可逆电子传递过程.该电极有很好的稳定性,并能显著地电催化氧的电化学还原反应.
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关 键 词: | 氯过氧化物酶 L-赖氨酸 电聚合 直接电化学 电催化 修饰电极 |
收稿时间: | 2010-02-28 |
The Electrochemical Characteristics of CPO-PLL/GC Electrode |
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Abstract: | Poly-L-lysine(PLL) was electropolymerized onto the surface of glassy carbon(GC) electrode.1(3-dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride(EDC) was used as a Cross-linking agent to immobilized Chloroperoxidase(CPO) onto the PLL/GC electrode.A pair of well-defined redox peaks was observed at CPO-PLL/GC electrode,which clearly suggested that PLL can promote the direct electron transfer between the CPO and the GC electrodes.The cyclic voltammetry results also showed that the electron transfer at CPO-PLL/GC is a surface adsorption-controlled quasi-reversible process,which is accompanied with proton transfer.The CPO-PLL/GC electrode exhibited a good electrochemical stability and excellently electrocatalytic activity for electrochemical reduction of O2. |
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Keywords: | chloroperoxidase poly-L-lysine electropolymerization direct electrochemistry electrocatalysis modified electrode |
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