Alcohol Dehydrogenase Immobilized on TiO2 Nanotubes for Ethanol Microfluidic Fuel Cells,ACS Sustainable Chemistry & Engineering

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Alcohol Dehydrogenase Immobilized on TiO2 Nanotubes for Ethanol Microfluidic Fuel Cells
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-01 , DOI: 10.1021/acssuschemeng.0c03219
J. Galindo-de-la-Rosa _{1,

2} , A. Álvarez ₂ , M. P. Gurrola _{3,

4} , J. A. Rodríguez-Morales ₂ , G. Oza ₁ , L.G. Arriaga ₁ , J. Ledesma-García ₂

Affiliation

In this work, an alcohol dehydrogenase (ADH) enzyme was used for ethanol oxidation in an air-breathing type microfluidic fuel cell. A bioanode was prepared using a catalytic ink prepared by using a mixture of ADH enzyme, tetrabutylammonium bromide, and Nafion and subsequently immobilized on TiO₂ nanotubes, previously synthesized by electrochemical anodization. Several techniques were used to determine the successful immobilization of the enzyme and the operational parameters of the bioanode (temperature and pH). Using scanning electrochemical microscopy, the photocatalytic activity was confirmed in the bioanode from the enhanced oxidizing current densities while preserving the enzymatic activity. Finally, the as-prepared bioanode was evaluated in a microfluidic device using a Pt/C commercial as the cathode, obtaining a good performance over an open circuit potential greater than 0.9 V.

中文翻译：

乙醇微流体燃料电池用TiO ₂纳米管上固定的乙醇脱氢酶

在这项工作中，酒精脱氢酶（ADH）酶用于空气呼吸型微流体燃料电池中的乙醇氧化。使用由ADH酶，四丁基溴化铵和Nafion的混合物制备的催化墨水制备生物阳极，然后将其固定在TiO _2上预先通过电化学阳极氧化合成的纳米管。几种技术用于确定酶的成功固定和生物阳极的操作参数（温度和pH）。使用扫描电化学显微镜，通过提高的氧化电流密度在生物阳极中确认了光催化活性，同时保留了酶活性。最后，在使用Pt / C商业产品作为阴极的微流控设备中评估了所制备的生物阳极，在大于0.9 V的开路电势下获得了良好的性能。

更新日期：2020-07-27

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