Chang Hyuck Choi

Abstract Electrocatalysts often undergo dynamic phase transitions during electrochemical operation, which introduce structural and chemical complexities that obscure the fundamental origins of their catalytic performance. Oxide-derived Cu (OD-Cu), produced by the electrochemical reduction of Cu oxide, exemplifies this challenge and continues to prompt debate regarding the nature of its high activity in CO2 electrolysis.

Abstract Toward tailored electrocatalysis, significant attention has been directed to the electrode-electrolyte interface. The electric double layer provides a crucial microenvironment for electrochemical reactions. However, its atomic-scale structure remains unresolved, particularly for non-dilute electrolyte concentrations relevant to practical systems.

Enhanced Electroreduction of CO2 by Ni−N−C Catalysts from the Interplay Between Valency and Local Coordination Symmetry Dongyup Shin, Hansol Choi, Jihun An, Chang Ho Sohn, Chang Hyuck Choi, Hyeyoung Shin and Hyungjun Kim Abstract Many studies have focused on atomically dispersed metal-nitrogen-carbon (Me–N–C) catalysts owing to their unique chemistry and high catalytic activities.