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説明:

Catalysts' redox reactions are crucial for storage and energy conversion.
Therefore, the fabrication of cost-effective, structurally rational, and
multifunctional advanced catalytic materials continues to be a crucial task. In this
study, we obtained P, Fe, and Co co-doped, nitrogen-rich carbon nanofibers by
directly forming carbon nanotubes from metal-organic frameworks through
electrospinning and pyrolysis. The P0.025-FeCo/C catalyst demonstrated
outstanding ORR activity, including an ECSA of 1954.3 cm², a limited current
density of -3.98 mA/cm2, an E1/2 of ~ 0.84 V, and an Eonset of ~ 0.94 V. After
5000 cycles, the P0.025-FeCo/C catalyst demonstrated remarkable enduring
stability. These function enhancements occurred because of the electronic
coupling between the metal and phosphorus, which altered the electron
distribution at the metal center and optimized its electronic structure, thereby
improving catalytic activity and stability. It exhibits good chemical stability in
alkaline media and can maintain its catalytic performance for a long time,
demonstrating good durability. Its tubular structure provides many active sites
and superior electron transport paths owing to its unique channels and cavities,
which help improve its activity and stability. Therefore, P0.025-FeCo/C is expected
to become a non-precious metal catalyst for facilitating oxygen reduction
reactions.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: Metal-organic framework, Oxygen reduction reactions, P doping, Transition metal phosphides, Carbon nanotubes

刊行年月日: 2025-12-31

出版者: Taylor&Francis

掲載誌:

• Science and Techonology of Advanced Materials (ISSN: 14686996) vol. 26 issue. 1 2459051

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5329

公開URL: https://doi.org/10.1080/14686996.2025.2459051

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更新時刻: 2025-02-23 22:47:45 +0900

MDRでの公開時刻: 2025-02-23 22:47:45 +0900