A highly efficient atomic nickel catalyst for CO2 electroreduction in acidic electrolyte

Abstract

The development of single atom catalysts (SACs) for CO₂ electroreduction in acidic electrolytes can greatly improve the CO₂ utilization efficiency but remains challenging. We report a carbon-embedded atomic nickel catalyst prepared from carbon black, porphyrin and nickel(II) salts. The catalyst shows excellent activity for CO₂ reduction with high CO faradaic efficiency of 99.9% and an industrial-level CO partial current density of 296.4 mA cm⁻² in acidic media, which indicates the importance of carbon-supported SACs.