微过氧化酶-11在聚赖氨酸修饰银电极上的电化学及电催化  

Electrochemical and Electrocatalytic Properties of Microperoxidase-11 Adsorbed on the Poly L Lysine Modified Ag Electrode

作　　者：王凤彬[1] 姜慧君[1] 邢巍[2] 陆天虹[1,3] 陈慧兰[4] 

机构地区：[1]中国科学院长春应用化学研究所 [2]南京师范大学化学与环境科学学院 [3]南京师范大学化学与环境科学学院,南京210097 [4]南京大学配位化学国家重点实验室

出　　处：《物理化学学报》2002年第5期404-408,共5页Acta Physico-Chimica Sinica

基　　金：国家"973"项目(G200026408);国家自然科学基金(29973015);南京大学配位化学国家重点实验室资助项目.

摘　　要：发现利用吸附在粗糙Ag电极上的聚赖氨酸(Ply),以静电作用方式固定微过氧化酶-11(MP-11)来制备MP-11/Ply/Ag修饰电极,不但方法简单,而且制得的修饰电极对O2的还原有高的电催化活性和好的稳定性.另外还发现MP-11分子中血红素的第六配体被配位能力较强的配体,如咪唑取代时,其本身的氧化还原电位负移,对O2还原的电催化活性降低.It is found that Ply adsorbed roughed silver electrode, it is easy to immobilize MP-11 with the electrostatic interaction and to prepare the MP-11/Ply/Ag modified electrode. The preparation method of the modified electrode is simple. In addition, the modified electrode obtained shows the high and stable electrocatalytic activity for O-2 reduction. It is also found that when the sixth coordination of heme in MP-11 is replaced with other coordination species with stronger coordination ability, such as imidazole, its formal redox potential shifts to the negative direction and the electrocatalytic activity for O-2 reduction is reduced.

关 键 词：银电极 电化学 微过氧化酶-11 聚赖氨酸 咪唑 修饰电极 电催化 

分 类 号：O646[理学—物理化学]