A Pair-Electrosynthesis for Formate at Ultra-Low Voltage Via Coupling of CO₂ Reduction and Formaldehyde Oxidation.

ABSTRACT: Formate can be synthesized electrochemically by CO₂ reduction reaction (CO₂RR) or formaldehyde oxidation reaction (FOR). The CO₂RR approach suffers from kinetic-sluggish oxygen evolution reaction at the anode. To this end, an electrochemical system combining cathodic CO₂RR with anodic FOR was developed, which enables the formate electrosynthesis at ultra-low voltage. Cathodic CO₂RR employing the BiOCl electrode in H-cell exhibited formate Faradaic efficiency (FE) higher than 90% within a wide potential range from - 0.48 to - 1.32 V_RHE. In flow cell, the current density of 100 mA cm^-2 was achieved at - 0.67 V_RHE. The anodic FOR using the Cu₂O electrode displayed a low onset potential of - 0.13

SUBMITTER: Li M 

PROVIDER: S-EPMC9626726 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature