期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 31, 页码 26178-26187出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b04940
关键词
NiFe nanoparticles; N-doped bamboo-like carbon nanotube; superior performance; bifunctional catalyst; zinc-air batteries
资金
- National Natural Science Foundation of China [21622303, 21333002]
- National Key Research and Development Plan [2016YFB0901503]
- Shanghai Science AMP
- Technology Committee [13JC1407900]
- State Key Basic Research Program of China [2016YFA0203302]
Developing low-cost catalysts for electrochemical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with superior performance in an alkaline solution is of significance for large-scale applications in aqueous zinc-air batteries (ZABs). Herein, we describe the in situ design of embedded NiFe nanoparticles into the N-doped bamboo-like carbon nanotube (NBCNT) with high catalytic performance and stability. The obtained NiFe@NBCNT hybrid exhibits a high electrochemical activity and stability with an unexpectedly low overpotential of similar to 195 mV for OER at 10 mA cm(-2) and an onset potential at 1.03 V for ORR, superior to the state-of-the-art Pt/C and RuO2 catalysts. Additionally, compared to the mixture of Pt/C and RuO2 cathodes, the ZAB based on the NiFe@NBCNT cathode displays a lower overpotential (0.80 V), higher stable round-trip efficiency (58.3%), and improved power density for 200 cycles at 10 mA cm(-2). Apparently, the obtained results indicate that the NiFe@NBCNT hybrid is proven to be one of the best nonnoble metal catalysts for achieving commercial implementation of rechargeable ZABs.
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