Cobalt-nitrogen-doped ordered macro-/mesoporous carbon for highly efficient oxygen reduction reaction
By Tingting Sun and Lianbin Xu and Shengyu Li and Wenxia Chai and Yan Huang and Yushan Yan and Jianfeng Chen
Published in Applied Catalysis B: Environmental
NULL
2016
Abstract
Cobalt-nitrogen-doped three-dimensionally (3D) ordered macro-/mesoporous carbons (Co-N-OMMCs) have been fabricated through a dual-templating synthesis approach in a one-pot controllable procedure by the use of silica colloidal crystal (opal) as a macroporous mold and triblock copolymer Pluronic \F127\ as a mesoporous template. The optimal catalyst (Co-N-OMMC-0.6) exhibits comparable catalytic activity but much higher durability and tolerance of methanol in comparison with the commercial 20 wt% Pt/C catalyst for oxygen reduction reaction (ORR) in an alkaline medium. The remarkable \ORR\ electrocatalytic performance of the Co-N-OMMC-0.6 is ascribed to the homogeneous distribution of abundant Co-Nx active sites, as well as the large surface area and efficient mass/charge transport from the unique structure combining well-ordered bicontinuous mesopores with 3D interconnected periodic macropores.
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