In this study, a facile dechlorination of lindane is achieved under mild electron reductive conditions with a series of Co(III)corroles used as electrocatalysts. Spectroscopic, electrochemical, and spectroelectrochemical measurements are used to determine the mechanism of the reaction. A GC-MS analysis of the dechlorination products indicates that the mesa-aryl substituents of the cobalt(III)corroles have a significant influence on the dechlorination efficiency when a fixed potential is applied. Under reductive catalysis, the Co(III)corroles provide highly satisfactory dechlorination results, since lindane was ultimately converted to chlorobenzene. (C) 2016 Published by Elsevier B.V.