Catalytic Oxidoreduction of Pyruvate/Lactate and Acetaldehyde/Ethanol Coupled to Electrochemical Oxidoreduction of NAD+/NADH
2004
Shin, I.H. (Seokyeong University, Seoul, Republic of Korea) | Park, H.S. (Samsung Engineering RnD Center, Yongin, Republic of Korea) | Jeon, S.J. (Seokyeong University, Seoul, Republic of Korea) | Park, D.H. (Seokyeong University, Seoul, Republic of Korea), E-mail: [email protected]
We deviced a new graphite-Mn(Ⅱ) electrode and found that the modified electrode with Mn(Ⅱ) can catalyze NADH oxidation and NAD+ reduction coupled to electricity production and consumption as oxidizing agent and reducing power, respectively. In fuel cell with graphite-Mn(Ⅱ) anode and graphite-Fe(Ⅲ) cathode, the electricity of 1.5 coulomb (A×s) was produced from NADH which was electrochemically reduced by the graphite-Mn(Ⅱ) electrode. When the initial concentrations of pyruvate and acetaldehyde were adjusted to 40 mM and 200 mM, respectively, about 25 mM lactate and 35 mM ethanol were produced from 40 mM pyruvate and 200 mM acetaldehyde, respectively, by catalysis of ADH and LDH in the electrochemical reactor with NAD+ as cofactor and electricity as reducing power.
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