Photochemical and enzymatic synthesis of formic acid from CO2 with chlorophyll and dehydrogenase system

Photochemical and enzymatic formic acid synthesis from CO2 gas system with the combination of formate dehydrogenase (FDH) from Saccharomyces cerevisiae and methylviologen (MV2+) reduction by the visible light photosensitisation of Mg chlorophyll-a (Mg Chl-a) is developed. Photochemical formic acid produced from COZ by adding FDH to the MV2+ photoreduction system using photosensitisation of Mg Chl-a in the presence of NADPH as an electron donating reagent, and 56 mu M of formic acid from COZ gas is produced after 4 h irradiation (1.0 M = 1.0 mol dm(-3)). (c) 2005 Elsevier B.V. All rights reserved.