Hybrid catalyst cascade architecture enhancement for complete ethanol electrochemical oxidation

Autor(es)

Franco, Jefferson Honorio ^[1] ; Aquino Neto, Sidney ^[1] ; Hickey, David P. ^{[2, 3]} ; Minteer, Shelley D. ^{[2, 3]} ; de Andrade, Adalgisa R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Ribeirao Preto, SP - Brazil

^[2] Univ Utah, Dept Chem, Salt Lake City, UT 84112 - USA

^[3] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 - USA

• Tipo de documento: Artigo Científico
• Fonte: BIOSENSORS & BIOELECTRONICS; v. 121, p. 281-286, DEC 15 2018.
• Citações Web of Science: 4

Resumo

MWCNT-COOH, TEMPO-modified linear poly(ethylenimine), and alcohol (ADH) and aldehyde (AldDH) dehydrogenase immobilization on electrode surfaces yields a hybrid, tri-catalytic architecture that can catalyze complete ethanol electro-oxidation. The chromatographic results obtained for the tri-catalytic hybrid electrode system show that ethanol is totally oxidized to CO2 after 12 h of electrolysis, confirming that organic oxidation catalysts combined with enzymatic catalysts enable collection of up to 12 electrons from ethanol. The Faradaic efficiency lies above 60% for all of the electrode systems investigated herein. Overall, this study illustrates that surface-immobilized, polymer hydrogel-based hybrid multi-catalytic systems exhibit high oxidation rates and constitute a simple methodology with useful application in the development of enzymatic biofuel cells. (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