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首页> 外文期刊>Chinese science bulletin >Immobilization and direct electrochemistry of copper-containing enzymes on active carbon
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Immobilization and direct electrochemistry of copper-containing enzymes on active carbon

机译：含铜酶在活性炭上的固定化和直接电化学

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摘要

Two typical and important copper-containing enzymes, laccase (Lac) and tyrosinase (Tyr), have been immobilized on the surface of active carbon with simple adsorption method. The cyclic voltammetric results indicated that the active carbon could promote the direct electron transfer of both Lac and Tyr and a pair of well-defined and nearly symmetric redox peaks appeared on the cyclic volt-anunograms of Lac or Tyr with the formal potential, independent on the scan rate. The further experimental results showed that, the immobilized copper-containing oxidase displayed an excellent electrocatalytic activity to the electrochemical reduction of O_2. The immobilization method presented here has several advantages, such as simplicity, easy to operation and keeping good activity of enzyme etc., and could be further used to study the direct electrochemistry of other redox proteins and enzymes fabricate the catalysts for biofuel cell.
机译：两种典型且重要的含铜酶，漆酶（Lac）和酪氨酸酶（Tyr），已通过简单的吸附方法固定在活性炭表面。循环伏安结果表明，活性炭可以促进Lac和Tyr的直接电子转移，并且Lac或Tyr的循环伏安图上有一对定义明确且几乎对称的氧化还原峰，具有形式电位，独立于扫描速率。进一步的实验结果表明，固定化的含铜氧化酶对O_2的电化学还原具有优异的电催化活性。本文提出的固定化方法具有简单，易操作，保持酶活性好等优点，可进一步用于研究其他氧化还原蛋白和酶的直接电化学反应，从而构成生物燃料电池的催化剂。

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