A mixed-ion strategy to construct CNT-decorated Co/N-doped hollow carbon for enhanced oxygen reduction

Abstract

A mixed-ion strategy to achieve carbon nanotube-decorated Co/N-doped hollow carbon hybrids (CNTs-Co/NHC) is developed by precisely controlling the Co²⁺/Zn²⁺ molar ratio in the ZIFs-Co_xZn_1−x precursor. The optimized CNTs-Co/NHC-0.23 catalyst shows outstanding catalytic activity and durability for the oxygen reduction reaction (ORR) and outperformed commercial Pt/C.