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Updated: Dec 1, 2025

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Enhanced Oxygen Reduction Catalysis of Carbon Nanohybrids from Nitrogen-Rich Edges
Jinquan Chang1,2, Luting Song1, Cheng Liang1,2
1CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China.
Abstract:
The edge doping effect would help improve the carbon-based electrocatalysis. Herein, we present an all-mechanical technique for the fabrication of cut, exfoliated N-doped carbon nanotubes (C, E-N-CNTs). Such nanohybrids with an edge-N-rich structure are obtained through sequential doping and mechanical treatments of the pristine bulk-CNTs. The C, E-N-CNT/carbon black (C, E-N-CNT/C) demonstrates exciting oxygen reduction reaction (ORR) electrocatalysis with exceptionally low-onset potential (E0, 913 mV versus RHE) and satisfactory half-wave potential (E1/2, merely -7.3 mV shift compared with that of commercial 20% platinum/C (Pt/C)). Besides, the C, E-N-CNT/C presents significantly enhanced durability and tolerance in chronoamperometry test with methanol injection compared with the Pt/C. Our work would facilitate the mass production and full exploration of nonmetallic electrocatalysts.
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