Franco, Jefferson Honorio
de Almeida, Paula Zaghetto
Hickey, David P.
Polizeli, Maria de Lourdes T. M.
Minteer, Shelley D.
de Andrade, Adalgisa R.
Total Authors: 8
 Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Chem, BR-14040901 Ribeirao Preto, SP - Brazil
 Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Biochem & Immunol, BR-14040901 Ribeirao Preto, SP - Brazil
 Univ Utah, Dept Chem, Salt Lake City, UT 84112 - USA
 Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 - USA
 Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Biol, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 5
Web of Science Citations:
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 CO2 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. (C) 2019 Elsevier B.V. All rights reserved. (AU)