期刊
NANO RESEARCH
卷 9, 期 2, 页码 317-328出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-015-0911-y
关键词
oxygen reduction; N-doped graphene; carbon nanotubes; in-situ grown; three-dimensional (3D) interconnected fiber networks
类别
资金
- National Natural Science Foundation of China [51203182, 51173202]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201312]
- Key Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University
- Guangxi Key Laboratory of Information Materials (Guilin University of Electronic Technology) [1210908-01-K]
- Research Project of NUDT [JC13-01-05]
- Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- Aid Program for Innovative Group of National University of Defense Technology
The strategy of combining highly conductive frameworks with abundant active sites is desirable in the preparation of alternative catalysts to commercial Pt/C for the oxygen reduction reaction (ORR). In this study, N-doped graphene (NG) and carbon nanotubes (CNT) were grown in-situ on Co-containing carbon nanofibers (CNF) to form three-dimensional (3D) interconnected networks. The NG and CNT bound the interlaced CNF together, facilitating electron transfer and providing additional active sites. The 3D interconnected fiber networks exhibited excellent ORR catalytic behavior with an onset potential of 0.924 V (vs. reversible hydrogen electrode) and a higher current density than Pt/C beyond 0.720 V. In addition, the hybrid system exhibited superior stability and methanol tolerance to Pt/C in alkaline media. This method can be extended to the design of other 3D interconnected network architectures for energy storage and conversion applications.
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