Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.carbon.2016.10.046
Title: A metal-free ORR/OER bifunctional electrocatalyst derived from metal-organic frameworks for rechargeable Zn-Air batteries
Authors: Qian, Yuhong 
Hu, Zhigang 
Ge, Xiaoming
Yang, Shiliu 
Peng, Yongwu 
Kang, Zixi 
Liu, Zhaolin
Lee, Jim Yang 
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
OXYGEN REDUCTION REACTION
NITROGEN-DOPED CARBON
GRAPHENE-BASED CATALYSTS
NANOPOROUS CARBON
RECENT PROGRESS
ACTIVE-SITES
EVOLUTION
ALKALINE
BORON
NANOSTRUCTURES
Issue Date: 1-Jan-2017
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: Qian, Yuhong, Hu, Zhigang, Ge, Xiaoming, Yang, Shiliu, Peng, Yongwu, Kang, Zixi, Liu, Zhaolin, Lee, Jim Yang, Zhao, Dan (2017-01-01). A metal-free ORR/OER bifunctional electrocatalyst derived from metal-organic frameworks for rechargeable Zn-Air batteries. CARBON 111 : 641-650. ScholarBank@NUS Repository. https://doi.org/10.1016/j.carbon.2016.10.046
Abstract: © 2016 Elsevier Ltd Rechargeable Zn-air batteries are under intensive studies because of their high-energy density, low cost, and safety. However, their wide application is prevented by several remaining technical issues, one of which is the lack of suitable bifunctional cathodic catalysts for oxygen reduction reaction (ORR) during discharging and oxygen evolution reaction (OER) during charging. Due to low material cost and wide distribution, carbon-based materials may serve as promising electrocatalysts, while doping heteroatoms such as nitrogen or boron can effectively enhance their catalytic activity. Herein, we pyrolyze a metal-organic framework containing Zn, N, and B as the precursor to synthesize dual-doped and metal-free porous carbon materials as efficient ORR/OER bifunctional electrocatalysts. The surface area of obtained carbon materials can be greatly enhanced by pyrolysis under H2-containing atmosphere. In addition, N and B are evenly distributed within the carbon materials due to the crystalline MOF precursor. The resultant carbon materials exhibit high ORR and OER catalytic activities in both half-cell and single-cell battery measurements. Our study has demonstrated for the first time that MOFs can be used as precursors to synthesize metal-free ORR/OER bifunctional cathodic electrocatalysts with great potential in rechargeable Zn-air batteries.
Source Title: CARBON
URI: https://scholarbank.nus.edu.sg/handle/10635/170477
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2016.10.046
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