期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 26, 页码 30512-30523出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c03141
关键词
graphene dots; 3D graphene; nitrogen-doped; phosphorus-doped; heteroatom doping; oxygen reduction reaction (ORR)
资金
- Youth Science and Technology Talent Growth Program of Guizhou Provincial Education Department [Qianjiao-heKY[2021]295]
- National Natural Science Foundation of China [22005072, 51971029]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds de la Recherche du Quebec sur la Nature et les Technologies (FRQNT)
- Centre Quebecois sur les Materiaux Fonctionnels (CQMF)
- Canada Research Chair program
- ECS-Toyota Young Investigator Fellowship
- CSC scholarship
- NSFC-BRICS STI Framework Program [51861145309]
- National ST Major Project [2018ZX10301201]
Nitrogen and phosphorus-codoped graphene dots supported on nitrogen-doped three-dimensional graphene were synthesized by freezing-annealing process, serving as a metal-free catalyst for oxygen reduction reaction. The catalyst exhibited excellent ORR activity, higher tolerance to methanol, and better stability compared to commercial Pt/C, indicating the potential for various applications.
Nitrogen and phosphorus-codoped graphene dots supported on nitrogen-doped three-dimensional graphene (N, P-GDs/N-3DG) have been synthesized by a facile freeze-annealing process. On the surface of the 3D interconnected porous structure, the N, P-GDs are uniformly dispersed. The as-prepared N, P-GDs/N-3DG material served as a metal-free catalyst for oxygen reduction reaction (ORR) in an alkaline medium and evaluated by a rotating ring-disk electrode. The N, P-GDs/N-3DG catalyst exhibits excellent ORR activity, which is comparable to that of the commercial Pt/C catalyst. Furthermore, it exhibits a higher tolerance to methanol and better stability than the Pt/C. This enhanced electrochemical catalytic performance can be ascribed to the presence of abundant functional groups and edge defects. This study indicates that P-N bonded structures play a vital role as the active sites in ORR.
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