Synthesis of yolk–shell COF with corrole and electrocatalytic property of Co-doped COF for oxygen reduction reaction

Abstract Covalent organic polymers (COP) were synthesized by polymerizing 5,10,15-tris(4-aminophenyl)corrole (TAPC) and terephthalaldehyde in the presence of acetic acid. Yolk–shells and filled structures were obtained after ripening of COP synthesized with low and high acetic acid/TAPC, respectively. The low cross-linking degree of COP synthesized by low acetic acid/TAPC resulted in a yolk–shell structure due to the easy dissolution of the interior. The Co-doped yolk–shell showed higher electrocatalytic activity for the oxygen reduction reaction than the filled structure.