Premium
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.