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Tong X, Cherif M, Zhang G, Zhan X, Ma J, Almesrati A, Vidal F, Song Y, Claverie JP, Sun S. N, P-Codoped Graphene Dots Supported on N-Doped 3D Graphene as Metal-Free Catalysts for Oxygen Reduction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:30512-30523. [PMID: 34170669 DOI: 10.1021/acsami.1c03141] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
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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Affiliation(s)
- Xin Tong
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
- School of Chemistry and Material Science, Guizhou Normal University, Guiyang 55000, China
| | - Mohamed Cherif
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
| | - Gaixia Zhang
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
| | - Xinxing Zhan
- School of Chemistry and Material Science, Guizhou Normal University, Guiyang 55000, China
| | - Jugang Ma
- School of Mathematics and Physics, University of Science & Technology Beijing, Beijing 10008, China
| | - Ali Almesrati
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
| | - François Vidal
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
| | - Yujun Song
- School of Mathematics and Physics, University of Science & Technology Beijing, Beijing 10008, China
| | - Jerome P Claverie
- Department of Chemistry, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | - Shuhui Sun
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1S2, Canada
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