Employing Methylene Green Coated Carbon Nanotube Electrodes to Enhance NADH Electrocatalysis for Use in an Ethanol Biofuel Cell | Zendy

Aquino Neto Sidney | Zendy; Almeida Thiago S. | Zendy; Meredith Matthew T. | Zendy; Minteer Shelley D. | Zendy; De Andrade Adalgisa R. | Zendy

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Employing Methylene Green Coated Carbon Nanotube Electrodes to Enhance NADH Electrocatalysis for Use in an Ethanol Biofuel Cell

Author(s) -

Aquino Neto Sidney,

Almeida Thiago S.,

Meredith Matthew T.,

Minteer Shelley D.,

De Andrade Adalgisa R.

Publication year - 2013

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201300282

Subject(s) - electrocatalyst , nicotinamide adenine dinucleotide , nad+ kinase , bioelectronics , carbon nanotube , biosensor , nanotechnology , methylene blue , electrode , chemistry , materials science , chemical engineering , catalysis , electrochemistry , organic chemistry , enzyme , photocatalysis , engineering

We prepared and characterized electrocatalysts based on multiwalled carbon nanotubes (MWCNTs) coated with methylene green (MG). These electrocatalysts can regenerate nicotinamide adenine dinucleotide (NAD + ), so they are potentially applicable in the field of bioelectronics. NADH oxidation occurs between 0.14±0.002 and 0.16±0.002 V vs. Ag/AgCl. The most efficient bioanode furnishes 88±7 µW cm −2 and 500 µA cm −2 and an open circuit voltage of 590±22 mV. In conclusion, we obtained a reliable and easy‐to‐prepare electrocatalyst that can regenerate NAD + and may be applicable in biosensors and bioelectronic devices that use a wide range of NAD + ‐dependent enzymes.

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