Department of Chemistry, Faculty of Philosophy Sciences and Letters at Ribeirão Preto, University of São Paulo, 14040-901 Ribeirão Preto, SP, Brazil.
Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo, 14040-901 Ribeirão Preto, SP, Brazil.
Bioelectrochemistry. 2019 Dec;130:107331. doi: 10.1016/j.bioelechem.2019.107331. Epub 2019 Jul 19.
Electrochemical ethanol oxidation was performed at an innovative hybrid architecture electrode containing TEMPO-modified linear poly(ethylenimine) (LPEI) and oxalate oxidase (OxOx) immobilized on carboxylated multi-walled carbon nanotubes (MWCNT-COOH). On the basis of chromatographic results, the catalytic hybrid electrode system completely oxidized ethanol to CO after 12 h of electrolysis. The fact that the developed system can catalyze ethanol electrooxidation at a carbon electrode confirms that organic oxidation catalysts combined with enzymatic catalysts allow up to 12 electrons to be collected per fuel molecule. The Faradaic efficiency of the hybrid system investigated herein lies above 87%. The combination of OxOx with TEMPO-LPEI to obtain a novel hybrid anode to oxidize ethanol to carbon dioxide constitutes a simple methodology with useful application in the development of enzymatic biofuel cells.
电化学乙醇氧化在含有 TEMPO 修饰的线性聚乙烯亚胺（LPEI）和固定在羧基化多壁碳纳米管（MWCNT-COOH）上的草酰氧化酶（OxOx）的创新混合架构电极上进行。根据色谱结果，在 12 小时的电解后，催化混合电极系统将乙醇完全氧化为 CO。开发的系统可以在碳电极上催化乙醇电氧化这一事实证实，有机氧化催化剂与酶催化剂的结合允许每个燃料分子收集多达 12 个电子。本文研究的混合系统的法拉第效率高于 87%。将 OxOx 与 TEMPO-LPEI 结合以获得新型混合阳极将乙醇氧化为二氧化碳，构成了一种简单的方法，可用于开发酶生物燃料电池。
