Surface-reconstructed Cu electrode via a facile electrochemical anodization-reduction process for low overpotential CO2 reduction

Abstract EN

A high-surface-area Cu electrode, fabricated by a simple electrochemical anodizationreduction method, exhibits high activity and selectivity for CO2 reduction at low overpotential in 0.1 M KHCO3 solution.

A faradaic efficiency of 37% for HCOOH and 27% for CO production was achieved with the current density of 1.5 mA cm 2 at 0.64 V vs.

RHE, much higher than that of polycrystalline Cu.

The enhanced catalytic performance is a result of the formation of the high electrochemical active surface area and high density of preferred low-index facets.