Lattice Chloride Doping-induced d-band modulation in Cu2O Nanocubes for Efficient Electrocatalytic Biomass Oxidation

Abstract

We report the synthesis of chloride-doped Cu₂O nanocubes (Cl-Cu₂O NCs) via a one-step electrodeposition. The incorporation of chlorine into the Cu₂O lattice downshifts the exposure of additional active sites and the generation of reactive oxygen species. For HMF electrooxidation, Cl-Cu₂O NCs achieve 98.3% FDCA selectivity and 97.9% Faradaic efficiency at 200 mA cm^-2 with excellent stability, showcasing anion doping as an effective strategy for biomass upgrading.