Revealing the heterogeneity of electrode surfaces using in situ photoluminescence electrochemical microscopy

Abstract

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