4.7 Article

γ-Fe2O3 clusters embedded in 1D porous N-doped carbon matrix as pH-universal electrocatalyst for enhanced oxygen reduction reaction

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Summary: Hierarchically porous carbon microspheres with trace amount of encapsulated cobalt exhibit highly active and stable electrocatalytic performance for oxygen reduction reactions (ORR) under wide pH conditions. The catalysts show competitive catalytic activity, superb durability, and methanol tolerance compared to benchmark Pt/C catalyst, even in harsh acidic environments, due to abundant active sites provided by rich surface defects and hierarchically porous structure. The in situ formed cobalt nanoparticles play a crucial role in creating mesopores, high specific surface area, and catalytically active defect sites over the carbon material, further enhancing the ORR activity of the catalysts with negligible cost impact.

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