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Formic acid (FA) is a promising reservoir for hydrogen storage and distribution. Its dehydrogenation releases CO₂ as a by-product, which limits its practical application. A proof of concept for a bio-catalytic system that simultaneously combines the dehydrogenation of formic acid for H₂, <i>in-situ</i> capture of CO₂ and its re-hydrogenation to reform formic acid is demonstrated. Enzymatic reactions catalyzed by carbonic anhydrase (CA) and formate dehydrogenase (FDH) under ambient condition are applied for <i>in-situ</i> CO₂ capture and re-hydrogenation, respectively, to develop a sustainable system. Continuous production of FA from stripped CO₂ was achieved at a rate of 40% using FDH combined with sustainable co-factor regeneration achieved by electrochemistry. In this study, the complete cycle of FA dehydrogenation, CO₂ capture, and re-hydrogenation of CO₂ to FA has been demonstrated in a single system. The proposed bio-catalytic system has the potential to reduce emissions of CO₂ during H₂ production from FA by effectively using it to recycle FA for continuous energy supply.