摘要：Three new cobalt triarylcorroles with sterically hindered haloginated phenyl rings were synthesized and characterized by UV-vis, ~1H NMR spectroscopy, mass spectrometry and electrochemistry. The compounds are represented as（Ar）3Cor Co（PPh3）, where Cor is a trianion of the corrole macrocycle and Ar is a 2-Cl Ph（1）, 2,6-diC l Ph（2） or 2,6-diF Ph（3） group on each of the three meso-positions. The structures of 1 and 3 were characterized in the solid state by single-crystal X-ray analysis. Rotating-disk electrode was utilized to examine the electrocatalytic activity of the corroles for reduction of O2 in 1.0 MHClO4. Effect of the sterically hindered meso-substituents on UV-vis spectra and redox potentials as well as the electrocatalytic activity for reduction of dioxygen was discussed.