State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Harbin 150090, PR China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Bioresour Technol. 2013 Oct;146:740-743. doi: 10.1016/j.biortech.2013.07.082. Epub 2013 Jul 24.
Biocatalyzed electrolysis systems (BES) have been the topic of a great deal of research. However, the biocathodes formed in single-chamber BES without extra inocula have not previously been researched. Along with the formation of biocathodes, the polarization current increased to 1.76 mA from 0.35 mA of abio-cathodes at -1.2 V (vs. SCE). Electrochemical impedance spectroscopy (EIS) results also indicated that the charge transfer resistance (Rct) was decreased to 148.9 Ω, less than 1978 Ω of the abio-cathodes cleared. The performance of the biocathodes was tested for azo dye decolorization, and the dye removal efficiency was 13.3±3.2% higher than abio-cathodes with a 0.5 V direct current (DC) power supply. These aspects demonstrate that biocathode accelerates the rate of electrode reaction in BES and comparing with noble metal catalysts, biocathodes have low toxicity or non-toxic and reproducible properties, which can be widely applied in bioelectrochemical field in the future.
生物催化电解系统（BES）一直是大量研究的主题。然而，以前没有研究过在没有额外接种物的单室 BES 中形成的生物阴极。随着生物阴极的形成，极化电流从-1.2 V（相对于 SCE）时的 0.35 mA 增加到 1.76 mA。电化学阻抗谱（EIS）结果也表明，电荷转移电阻（Rct）降低至 148.9 Ω，小于清除的无生物阴极的 1978 Ω。测试了生物阴极对偶氮染料脱色的性能，与具有 0.5 V 直流（DC）电源的无生物阴极相比，染料去除效率提高了 13.3±3.2%。这些方面表明生物阴极加速了 BES 中电极反应的速率，与贵金属催化剂相比，生物阴极具有低毒性或无毒且可重复使用的特性，可在未来广泛应用于生物电化学领域。
