Bioinspired architecture of a hybrid bifunctional enzymatic/organic electrocatalyst for complete ethanol oxidation

Autor(es)

Franco, Jefferson Honorio ^[1] ; de Almeida, Paula Zaghetto ^[2] ; Abdellaoui, Sofiene ^{[3, 4]} ; Hickey, David P. ^{[3, 4]} ; Ciancaglini, Pietro ^[1] ; Polizeli, Maria de Lourdes T. M. ^[5] ; Minteer, Shelley D. ^{[3, 4]} ; de Andrade, Adalgisa R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Chem, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Biochem & Immunol, BR-14040901 Ribeirao Preto, SP - Brazil

^[3] Univ Utah, Dept Chem, Salt Lake City, UT 84112 - USA

^[4] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 - USA

^[5] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Biol, BR-14040901 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOELECTROCHEMISTRY; v. 130, DEC 2019.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 17/20431-7 - Desenvolvimento de uma cascata enzimática híbrida para a produção de biocélula etanol/O2 eficiente
• Beneficiário: Jefferson Honorio Franco
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado