Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries
Rational design and synthesis of highly active and robust bifunctional non-noble electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are urgently required for efficient rechargeable metal-air batteries. Herein, abundant MnO/Co heterointerfaces are engineered...
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sg-ntu-dr.10356-1385962023-12-29T06:46:58Z Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries Lu, Xue Feng Chen, Ye Wang, Sibo Gao, Shuyan Lou, Xiong Wen David School of Chemical and Biomedical Engineering Engineering::Chemical engineering MnO/Co Heterointerfaces Graphitic Carbon Rational design and synthesis of highly active and robust bifunctional non-noble electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are urgently required for efficient rechargeable metal-air batteries. Herein, abundant MnO/Co heterointerfaces are engineered in porous graphitic carbon (MnO/Co/PGC) polyhedrons via a facile hydrothermal-calcination route with a bimetal-organic framework as the precursor. The in situ generated Co nanocrystals not only create well-defined heterointerfaces with high conductivity to overcome the poor OER activity but also promote the formation of robust graphitic carbon. Owing to the desired composition and formation of the heterostructures, the resulting MnO/Co/PGC exhibits superior activity and stability toward both OER and ORR, which makes it an efficient air cathode for the rechargeable Zn-air battery. Importantly, the homemade Zn-air battery is able to deliver excellent performance including a peak power density of 172 mW cm-2 and a specific capacity of 872 mAh g-1 , as well as excellent cycling stability (350 cycles), outperforming commercial mixed Pt/C||RuO2 catalysts. This work highlights the synergy from heterointerfaces in oxygen electrocatalysis, thus providing a promising approach for advanced metal-air cathode materials. NRF (Natl Research Foundation, S’pore) Accepted version 2020-05-11T02:19:00Z 2020-05-11T02:19:00Z 2019 Journal Article Lu, X. F., Chen, Y., Wang, S., Gao, S., & Lou, D. X. W. (2019). Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries. Advanced Materials, 31(39), 1902339-. doi:10.1002/adma.201902339 0935-9648 https://hdl.handle.net/10356/138596 10.1002/adma.201902339 31348572 2-s2.0-85072327715 39 31 1902339 (1 of 8) 1902339 (1 of 8) en Advanced Materials © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. application/pdf |
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Engineering::Chemical engineering MnO/Co Heterointerfaces Graphitic Carbon Lu, Xue Feng Chen, Ye Wang, Sibo Gao, Shuyan Lou, Xiong Wen David Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
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Rational design and synthesis of highly active and robust bifunctional non-noble electrocatalysts for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are urgently required for efficient rechargeable metal-air batteries. Herein, abundant MnO/Co heterointerfaces are engineered in porous graphitic carbon (MnO/Co/PGC) polyhedrons via a facile hydrothermal-calcination route with a bimetal-organic framework as the precursor. The in situ generated Co nanocrystals not only create well-defined heterointerfaces with high conductivity to overcome the poor OER activity but also promote the formation of robust graphitic carbon. Owing to the desired composition and formation of the heterostructures, the resulting MnO/Co/PGC exhibits superior activity and stability toward both OER and ORR, which makes it an efficient air cathode for the rechargeable Zn-air battery. Importantly, the homemade Zn-air battery is able to deliver excellent performance including a peak power density of 172 mW cm-2 and a specific capacity of 872 mAh g-1 , as well as excellent cycling stability (350 cycles), outperforming commercial mixed Pt/C||RuO2 catalysts. This work highlights the synergy from heterointerfaces in oxygen electrocatalysis, thus providing a promising approach for advanced metal-air cathode materials. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Lu, Xue Feng Chen, Ye Wang, Sibo Gao, Shuyan Lou, Xiong Wen David |
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Article |
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Lu, Xue Feng Chen, Ye Wang, Sibo Gao, Shuyan Lou, Xiong Wen David |
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Lu, Xue Feng |
title |
Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
title_short |
Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
title_full |
Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
title_fullStr |
Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
title_full_unstemmed |
Interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for Zn-air batteries |
title_sort |
interfacing manganese oxide and cobalt in porous graphitic carbon polyhedrons boosts oxygen electrocatalysis for zn-air batteries |
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2020 |
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https://hdl.handle.net/10356/138596 |
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