In situ copper faceting enables efficient CO₂/CO electrolysis.

ABSTRACT: The copper (Cu)-catalyzed electrochemical CO₂ reduction provides a route for the synthesis of multicarbon (C₂₊) products. However, the thermodynamically favorable Cu surface (i.e. Cu(111)) energetically favors single-carbon production, leading to low energy efficiency and low production rates for C₂₊ products. Here we introduce in situ copper faceting from electrochemical reduction to enable preferential exposure of Cu(100) facets. During the precatalyst evolution, a phosphate ligand slows the reduction of Cu and assists the generation and co-adsorption of CO and hydroxide ions, steering the surface reconstruction to Cu (100). The resulting Cu catalyst enables current densities of > 500 mA cm^-2 and Faradaic efficiencies of >83% towards C_2+</

SUBMITTER: Yao K 

PROVIDER: S-EPMC10897386 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature