The oxygen reduction reaction (ORR) is an extremely important reaction in many renewable energy-related devices. The sluggish kinetics of the ORR limits the development of many fuel cells. Design and synthesis of highly efficient nonprecious electrocatalysts are of vital importance for electrochemical reduction of oxygen. Herein, we develop a graphitic carbon nitride (g-C3N4)-derived bamboo-like carbon nanotubes/carbon-wrapped Co nanoparticles (BCNT/Co) electrocatalyst by a simple high-temperature pyrolysis and acid-leaching method. The catalytic performance of the as-designed electrocatalyst toward ORR outperforms the commercial Pt/C catalyst in alkaline solution. The onset potential of nonprecious BCNT/Co-800 catalyst was 1.12 V. The half-wave potential was 0.881 V. The result was superior to that of commercial Pt/C (0.827 V vs RHE). The Co nanoparticles, bamboo-like carbon nanotubes, defects, and Co-Nx active sites all result in the remarkable ORR activity, stability, and great methanol tolerance.

中文翻译：

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石墨状氮化碳（g-C3N4）衍生的类似竹子的碳纳米管/钴纳米颗粒杂化物，可实现高效的电催化氧还原。

氧还原反应（ORR）在许多可再生能源相关设备中是极其重要的反应。ORR的动力学迟缓限制了许多燃料电池的发展。高效非贵金属电催化剂的设计和合成对于氧气的电化学还原至关重要。在这里，我们通过简单的高温热解和酸浸法开发了石墨化的碳氮化物（g-C3N4）衍生的竹状碳纳米管/碳包裹的钴纳米颗粒（BCNT / Co）电催化剂。设计的电催化剂对ORR的催化性能优于碱性溶液中的商用Pt / C催化剂。非贵重BCNT / Co-800催化剂的起始电势为1.12V。半波电势为0.881V。结果优于商用Pt / C（0.827 V对RHE）。