Hybrid catalyst cascade architecture enhancement for complete ethanol electrochemical oxidation

Biosensors & Bioelectronics
Jefferson Honorio FrancoA R de Andrade

Abstract

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.

References

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Citations

Feb 10, 2021·Biosensors·Jefferson Honorio FrancoAdalgisa R De Andrade
Jul 28, 2019·Bioelectrochemistry·Jefferson Honorio FrancoAdalgisa R de Andrade
Jan 28, 2021·Annual Review of Physical Chemistry·Yoo Seok LeeShelley D Minteer
Oct 15, 2020·Chemical Reviews·Hui ChenShelley D Minteer

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