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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enhanced electrochemical oxidation of ethanol using a hybrid catalyst cascade architecture containing pyrene-TEMPO, oxalate decarboxylase and carboxylated multi-walled carbon nanotube

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Franco, Jefferson Honorio [1, 2] ; Klunder, Kevin J. [1] ; Lee, Jack [1] ; Russell, Victoria [1] ; de Andrade, Adalgisa R. [2] ; Minteer, Shelley D. [1]
Total Authors: 6
[1] Univ Utah, Dept Chem, Salt Lake City, UT 84112 - USA
[2] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Chem, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: BIOSENSORS & BIOELECTRONICS; v. 154, APR 15 2020.
Web of Science Citations: 0

The work presented herein demonstrates a hybrid bi-catalytic architecture for the complete electrochemical oxidation of ethanol. The new catalytic system contains pyrene-TEMPO (TEMPO = 2,2,6,6-tetramethylpiperidinyl-N-oxyl) immobilized on the surface of carboxylated multi-walled carbon nanotubes (MWCNT-COOH), and oxalate decarboxylase enzyme (OxDc) immobilized onto a carbon cloth electrode. Electrolysis revealed a stable amperometric curve and an excellent current density value over a duration of 10 h. In addition, the hybrid system immobilized on the carbon electrode exhibits outstanding stability after electrolysis. Nuclear magnetic resonance (NMR) and gas chromatography (GC) demonstrate that the hybrid electrode system is able to oxidize ethanol to CO2 after 10 h of electrolysis. Overall, this study illustrates the enhancement of an enzymatic biofuel cell through the hybrid multi-catalytic systems, which exhibit high oxidation rates for all substrates involved in complete ethanol oxidation, enabling the collection of up to 12 electrons per molecule of ethanol. (AU)

FAPESP's process: 17/20431-7 - Development of hybrid enzymatic cascade to produce an efficient ethanol/O2 biofuel cell
Grantee:Jefferson Honorio Franco
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/24180-1 - Preparation of hybrid multi-catalyst architecture containing enzyme, organic catalyst and carbon nanotubes modified for complete ethanol electrochemical oxidation
Grantee:Jefferson Honorio Franco
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor