Electrocatalytic CO₂ Reduction to Alcohols with High Selectivity over a Two-Dimensional Fe₂P₂S₆ Nanosheet

Electrochemical conversion of CO₂ into alcohols provides an attractive path toward achieving a carbon-neutral cycle, while its efficiency is challenged by identifying active electrocatalysts for the CO₂ reduction reaction (CO₂RR). In this work, we report the Fe₂P₂S₆ nanosheet acts as an efficient CO₂RR electrocatalytst toward highly selective hydrogenation of CO₂ to alcohols. This catalyst is capable of achieving a high total Faradaic efficiency (FE_{methanol+ethanol}) of 88.3%, with a FE_methanol up to 65.2% at −0.20 V vs the reversible hydrogen electrode in 0.5 M KHCO₃ solution, much higher than most reported CO₂RR electrocatalysts. Density functional theory calculations indicate that Fe atom on the Fe₂P₂S₆ surface can be regared as the active site for alcohol formation.