The rational construction of heterointerfaces in hollow nanohybrids is considered as a promising and challenging approach for enhancing their electracatalytic performance. Herein, we demonstrate the synthesis of CoFe2Se4/NiCo2Se4 hybrid nanotubes...
Fuel cells have attracted increasing attention due to their low cost, high energy density, low environmental pollution, and abundant raw materials. Oxygen reduction reaction (ORR) is a core technology of fuel cells, and the development of new electrocatalysts with high ORR performance is highly desirable. Herein, we synthesize a series of B, N co‐doped hierarchical porous carbons using a soft template method with the integration of self‐assembly, calcination and etching. The obtained materials exhibit hierarchical porous structures, controllable pore distribution, partial graphite structures, and B, N co‐doping. They can function as the cost‐effective and metal‐free electrocatalysts, facilitating the diffusion of electrolyte ions and the improvement of ORR performance. Especially, the B, N co‐doped porous carbon with the B‐to‐N molar ratio of 5 (BNC‐5) displays a high ORR activity with a half‐wave potential (E1/2) of 0.73 V, an onset potential (Eonset) of 0.94 V, and a high limiting current density (JL) of 5.98 mA cm−2, superior to the N‐doped C (NC) and BNC‐1 (the B‐to‐N molar ratio=1), BNC‐3 (the B‐to‐N molar ratio=3) and BNC‐7 (the B‐to‐N molar ratio=7) under the identical conditions. Moreover, the BNC‐5 exhibits good cycling stability after 5000 cyclic voltammetry (CV) cycles and excellent tolerance toward even 3 M methanol. This research provides a new approach for the facile synthesis of dual element‐doped carbon electrocatalysts with high ORR performance.
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