Enhancement of the Direct Electron Transfer-type Bioelectrocatalysis of Bilirubin Oxidase at the Interface between Carbon Particles
Enhancement of the Direct Electron Transfer-type Bioelectrocatalysis of Bilirubin Oxidase at the Interface between Carbon Particles
复制标题
增强碳颗粒界面处胆红素氧化酶的直接电子转移型生物电催化作用
DOI：
10.5796/electrochemistry.20-00128
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发表时间：
2021
期刊：
影响因子：
2.5
通讯作者：
K. Kano
中科院分区：
文献类型：
--
作者：
Mizue Wanibuchi;Y. Kitazumi;O. Shirai;K. Kano
多孔电极上直接电子转移（DET）型生物电催化的模拟模型表明，当a较小时，催化电流与实际比表面积(a)成正比。当A较大时，催化电流在由多孔结构中的传质控制的有限值处饱和。本研究基于多孔电极的充电电流，分析了多孔电极上的生物电催化电流。用Vulcan和脱落石墨（JSP）构建的碳复合材料的比较表明，Vulcan和脱落石墨（JSP）颗粒之间的界面比相同类型颗粒之间的界面更适合于dt型胆红素氧化酶（BOD）的生物电催化。特别是，在复合电极中，Vulcan: JSP比例为1:1时，获得了最合适的性能。在这些复合材料中，BOD分子与电极之间的多点接触似乎导致更高的det型生物电催化活性。
The simulation model of the direct electron transfer (DET)-type bioelectrocatalysis at a porous electrode indicates that the catalytic current is proportional to the real surface area ( A ), when A is small. When A is large, the catalytic current is saturated at a limited value controlled by the mass transfer in the porous structure. In this study, the bioelectrocatalytic currents at porous electrodes are analyzed based on their charging currents. Comparisons among the carbon composites constructed with Vulcan and exfoliated graphite (JSP) show that the interface between the Vulcan and JSP particles is more suitable for the DET-type bioelectrocatalysis of bilirubin oxidase (BOD) than that between the particles of the same type. In particular, the most suitable properties were achieved at a Vulcan : JSP ratio of 1 : 1 in the composite electrode. In these composites, the multipoint contact between the BOD molecule and electrode seems to result in a higher DET-type bioelectrocatalytic activity.