| Popis: |
Electrochemical NAD+ reduction is a promising method to regenerate NADH for enzymatic reactions. Many different electrocatalysts have been tested in the search for high yields of the 1,4-isomer of NADH, the active NADH, but aside from electrode material, other system parameters such as pH, electrode potential and educt concentration also play a role in NADH regeneration. The effect of these last three parameters and the mechanisms behind their influence on NADH regeneration was systematically studied and presented in this paper. With percentages of active NADH ranging from 10% - to 70% and faradaic efficiencies between 1% and 30%, it is clear that all three system parameters drastically affect the reaction outcome. The optimised reaction conditions were applied to test the consumption of the regenerated NADH by an enzymatic reaction. Electrochemical NAD + reduction in the presence of pyruvate and lactate dehydrogenase revealed that the 1,4-isomer of NADH, the physiological substrate of oxidoreductases, accounted for around 45% of the detectable electrochemically regenerated NADH. |
