Integrating hydrogen utilization in CO₂ electrolysis with reduced energy loss.

ABSTRACT: Electrochemical carbon dioxide reduction reaction using sustainable energy is a promising approach of synthesizing chemicals and fuels, yet is highly energy intensive. The oxygen evolution reaction is particularly problematic, which is kinetically sluggish and causes anodic carbon loss. In this context, we couple CO₂ electrolysis with hydrogen oxidation reaction in a single electrochemical cell. A Ni(OH)₂/NiOOH mediator is used to fully suppress the anodic carbon loss and hydrogen oxidation catalyst poisoning by migrated reaction products. This cell is highly flexible in producing either gaseous (CO) or soluble (formate) products with high selectivity (up to 95.3%) and stability (>100 h) at voltages below 0.9 V (50 mA cm^-2). Importantly, thanks to the "tran

SUBMITTER: Jiang X 

PROVIDER: S-EPMC10873292 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature