期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 593, 期 -, 页码 204-213出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.02.115
关键词
Dicyandiamide formaldehyde resin; Carbon nanotubes; Metal-nitrogen-carbon; FeNi nanoparticles; Bifunctional catalyst; Zn-air battery
资金
- National Natural Science Foundation of China [21905153, 51472174, 21776147]
- International Science & Technology Cooperation Program of China [2014DFA60150]
- Project of Shandong Province Higher Educational Science and Technology Program [J17KA013, 2018LS003]
- Qingdao Municipal Science and Technology Bureau, China [196191nsh]
- Shandong Provincial Natural Science Foundation [ZR2020QB129]
- Science and Technology Development Plan of Weifang [2020GX068]
- Research Fund Program of Key Laboratory of Fuel Cell Technology of Guangdong Province
- Malmstrom Endowed Fund at Hamline University
Innovative synthesis of multi-doped carbon nanotubes (CoFeNi@CNT) with metal-nitrogen-carbon and CoFeNi nanoparticles as dual-active-sites enables high performance in both oxygen reduction and oxygen evolution reactions, showing potential for rechargeable Zn-air batteries.
Rational construction of advanced bifunctional catalysts with dual-active-sites is still challenging for both oxygen reduction (ORR) and oxygen evolution reactions (OER). Herein, metal-doped dicyandiamide formaldehyde resin is innovatively exploited to synthesize N/Co/Fe/Ni multi-doped carbon nanotubes (denoted as CoFeNi@CNT) with metal-nitrogen-carbon (M-N-C) and CoFeNi nanoparticles as the ORR and OER active sites, respectively. Abundant active sites and high degree of graphitization enable CoFeNi@CNT with a high ORR half-wave potential of 0.82 V and a low OER overpotential of 440 mV at 10 mA cm(-2), which are comparable or superior to noble-metal catalysts. Particularly, the CoFeNi@CNT air electrode of rechargeable Zn-air batteries shows remarkable open circuit potential (1.46 V), discharge power density (152.3 mW cm(-2)), specific capacity (814 mAh g(-1)), and cycling stability for more than 250 h. It is worth emphasizing that this synthesis strategy is rather simple, low-cost, high yield, and the proportion and amount of doped metal ions can be easily adjusted according to the needs for different applications. (C) 2021 Elsevier Inc. All rights reserved.
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