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A) Schematic representation of AcPyTACN‐modified MWCNT for the immobilization of Rec‐RrCODHHis. B) CVs of Rec‐RrCODHHis‐functionalized (a, black) pristine MWCNT electrode and (b, blue) Ni‐AcPyTACN‐modified MWCNT electrodes under Ar (inset) and CO2 (50 mM Tris‐HCl, pH 8.5, v=5 mV s−1).
