期刊
JOURNAL OF POWER SOURCES
卷 467, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228302
关键词
Metal-nitrogen moiety; Graphene; Carbon nanotube; Oxygen reduction reaction; Oxygen evolution reaction
资金
- National Natural Science Foundation of China of China [51972237, 51920105004, 51672193, 51420105002]
- State Key Laboratory from Structural Chemistry, Chinese Academy of Sciences [20190008]
- Excellent Youth Cultivation Project from Wenzhou University
Exploiting non-noble metal bifunctional electrocatalysts for efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a feasible approach for developing clean energy. Herein, we synthesize a transition metal coordinating nitrogen (Fe/Ni-N) doped carbon material (FeNi-MNC) with unique morphology combining external diverging carbon nanotubes and internal carbon matrix with ordered macropore alignments. With the co-catalysis of Fe and Ni species and the space limiting of SiO2 template in carbonation, the obtained FeNi-MNC shows high Fe/Ni-N contents. Profiting from the hierarchical morphology and abundant active sites, the catalyst exhibits excellent activity for ORR in 0.1 M KOH with a half-wave potential of 0.834 V and a Tafel slope of 53.1 my dec(-1) being superior to Pt/C. Moreover, it only needs an overpotential of 298 mV reaching 10 mA cm(-2) for OER in 1.0 M KOH. Our work constructs a 3-dimensional porous carbon matrix integrated with 1-dimensional carbon nanotubes and 2-dimensional carbon nanosheets to enhance the catalytic performance.
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