高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (1): 35.

• 论文 • 上一篇    下一篇

NADH在邻苯二酚紫修饰石墨电极上的电催化氧化

朱荣贵, 韩吉林, 陈洪渊   

  1. 南京大学化学系, 南京 210008
  • 收稿日期:1994-01-31 修回日期:1991-06-10 出版日期:1995-01-24 发布日期:1995-01-24
  • 通讯作者: 朱荣贵,男,31岁,讲师,现在镇江医学院检验系.
  • 作者简介:陈洪渊
  • 基金资助:

    国家自然科学基金

Catalytic Oxidation of Reduced Dihydronicotinamide Adenine Dinucleotide at Catechol Violet Modified Graphite Electrode

ZHU Rong-Gui, HAN Ji-Lin, CHEN Hong-Yuan   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1994-01-31 Revised:1991-06-10 Online:1995-01-24 Published:1995-01-24

摘要: 以吸附在石墨电极上的邻苯二酚紫作为电子传递媒介体构成修饰电极。在-0,40~+0.60V电位区间内,吸附态的邻苯二酚紫表现出相当可逆的氧化、还原行为,电极反应为单电子过程并有1个质子参加。在pH为7.0的磷酸盐缓冲溶液中,其式量电位E0'为0.10V,表现电极反应速率常数ks为5.5s-1.邻苯二酚紫修饰电极对还原型烟酰胺腺嘌呤二核苷酸(NADH)的电化学氧化具有明显的催化作用,可使NADH的氧化过电位降低250mV.

关键词: 烟酰胺腺嘌呤二核苷酸, 电催化氧化, 邻苯二酚紫, 修饰电极

Abstract: In this work, catechol violet modified graphite electrode shows significantly electrocatalytic activity to the oxidation of reduced nicotinamide adenine dinucleotide (NADH),making oxidation overpotential decrease by 250 mV compared with the direct oxidation of NADH at bare graphite electrode. In the medium of 0. 1 mol/Lphosphate buffer (pH=7.0) the surface formal potential E0' and apparent electron-transfer rate of the adsorbed mediator catechol violet are 0.10 Vand 5.5s-1, respectively.

Key words: Dihydronicotinamide adenine dinucleotide, Electrocatalytic oxidation, Catechol violet, Chemically modified electrode

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