Single Atoms Anchored on Cobalt-Based Catalysts Derived from Hydrogels Containing Phthalocyanine toward the Oxygen Reduction Reaction
Yuanyuan Fu, Dawei Xu, Yefei Wang, Xuhui Li, Zhengbo Chen, Kai Li, Zhong‐Feng Li, Lirong Zheng, Xia Zuo
Abstract
Herein, a novel hydrogel-derived three-dimensional network-like nanostructured CoOX/Co–N–C(800) catalyst was synthesized. CoOX nanoparticles are embedded on N-doped carbon with single Co atoms anchored after pyrolysis. The as-prepared CoOX/Co–N–C(800) catalyst possesses excellent electrochemical performance toward the oxygen reduction reaction with a positive onset and half-wave potential of 0.95 and 0.88 V (vs RHE), respectively, including almost a four-electron pathway (3.97) and better durability compared with the 20% commercial Pt/C catalyst in an alkaline electrolyte. Also, the results demonstrate that the high performance is attributed to the synergistic effect of CoOX nanoparticles and single Co atoms.