Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo...

Full description

Saved in:
Bibliographic Details
Main Authors: Ge, Xiaoming, Liu, Yayuan, Goh, F. W. Thomas, Hor, T. S. Andy, Zong, Yun, Xiao, Peng, Zhang, Zheng, Lim, Suo Hon, Li, Bing, Wang, Xin, Liu, Zhaolin
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2016
Subjects:
Online Access:https://hdl.handle.net/10356/82074
http://hdl.handle.net/10220/39754
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-82074
record_format dspace
spelling sg-ntu-dr.10356-820742023-07-14T15:49:31Z Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution Ge, Xiaoming Liu, Yayuan Goh, F. W. Thomas Hor, T. S. Andy Zong, Yun Xiao, Peng Zhang, Zheng Lim, Suo Hon Li, Bing Wang, Xin Liu, Zhaolin School of Chemical and Biomedical Engineering School of Materials Science & Engineering Oxygen evolution reaction Covalent coupling Oxygen reduction reaction Transition-metal oxide Spinel Nanocarbon Metal-air battery Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc–air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge–charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2016-01-22T05:28:59Z 2019-12-06T14:46:00Z 2016-01-22T05:28:59Z 2019-12-06T14:46:00Z 2014 Journal Article Ge, X., Liu, Y., Goh, F. W. T., Hor, T. S. A., Zong, Y., Xiao, P., et al. (2014). Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution. ACS Applied Materials & Interfaces, 6(15), 12684-12691. 1944-8244 https://hdl.handle.net/10356/82074 http://hdl.handle.net/10220/39754 10.1021/am502675c en ACS Applied Materials & Interfaces © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Applied Materials & Interfaces, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/am502675c]. 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Oxygen evolution reaction
Covalent coupling
Oxygen reduction reaction
Transition-metal oxide
Spinel
Nanocarbon
Metal-air battery
spellingShingle Oxygen evolution reaction
Covalent coupling
Oxygen reduction reaction
Transition-metal oxide
Spinel
Nanocarbon
Metal-air battery
Ge, Xiaoming
Liu, Yayuan
Goh, F. W. Thomas
Hor, T. S. Andy
Zong, Yun
Xiao, Peng
Zhang, Zheng
Lim, Suo Hon
Li, Bing
Wang, Xin
Liu, Zhaolin
Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
description Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc–air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge–charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Ge, Xiaoming
Liu, Yayuan
Goh, F. W. Thomas
Hor, T. S. Andy
Zong, Yun
Xiao, Peng
Zhang, Zheng
Lim, Suo Hon
Li, Bing
Wang, Xin
Liu, Zhaolin
format Article
author Ge, Xiaoming
Liu, Yayuan
Goh, F. W. Thomas
Hor, T. S. Andy
Zong, Yun
Xiao, Peng
Zhang, Zheng
Lim, Suo Hon
Li, Bing
Wang, Xin
Liu, Zhaolin
author_sort Ge, Xiaoming
title Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
title_short Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
title_full Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
title_fullStr Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
title_full_unstemmed Dual-Phase Spinel MnCo2O4 and Spinel MnCo2O4/Nanocarbon Hybrids for Electrocatalytic Oxygen Reduction and Evolution
title_sort dual-phase spinel mnco2o4 and spinel mnco2o4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution
publishDate 2016
url https://hdl.handle.net/10356/82074
http://hdl.handle.net/10220/39754
_version_ 1772825315635101696