Revealing heterogeneity of electrode surface by in-situ photoluminescence electrochemical microscope

Abstract

A photoluminescence-based in-situ electrochemical microscope enables micrometer-scale probing of electrode heterogeneity. Our results revealed a correlation between the potential–negative differential photoluminescence profile and corresponding cyclic voltammogram. We further elucidated the structure–activity relationship linking interfacial heterogeneity to electrocatalytic performance of electrodeposition Cu₂O as a proof-of-concept experiment.