Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media

The increasing global energy demand and the depletion of fossil fuels have stimulated intense research on fuel cells and batteries. Oxygen electrocatalysis plays essential roles as the electrocatalytic reduction and evolution of di-oxygen are always the performance-limiting factors of these devices...

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Main Authors: Ge, Xiaoming, Goh, F. W. Thomas, Li, Bing, Hor, T. S. Andy, Zhang, Jie, Xiao, Peng, Wang, Xin, Zong, Yun, Liu, Zhaolin
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2016
Online Access:https://hdl.handle.net/10356/81847
http://hdl.handle.net/10220/39682
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-818472023-12-29T06:45:19Z Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media Ge, Xiaoming Goh, F. W. Thomas Li, Bing Hor, T. S. Andy Zhang, Jie Xiao, Peng Wang, Xin Zong, Yun Liu, Zhaolin School of Chemical and Biomedical Engineering The increasing global energy demand and the depletion of fossil fuels have stimulated intense research on fuel cells and batteries. Oxygen electrocatalysis plays essential roles as the electrocatalytic reduction and evolution of di-oxygen are always the performance-limiting factors of these devices relying on oxygen electrochemistry. A novel perovskite with the formula La(Co0.55Mn0.45)0.99O3−δ (LCMO) is designed from molecular orbital principles. The hydrothermally synthesized LCMO nanorods have unique structural and chemical properties and possess high intrinsic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synergic covalent coupling between LCMO and NrGO enhances the bifunctional ORR and OER activities of the novel LCMO/NrGO hybrid catalyst. The ORR activity of LCMO/NrGO is comparable to the state-of-the-art Pt/C catalyst and its OER activity is competitive to the state-of-the-art Ir/C catalyst. LCMO/NrGO generally outperforms Pt/C and Ir/C with better bifunctional ORR and OER performance and operating durability. LCMO/NrGO represents a new class of low-cost, efficient and durable electrocatalysts for fuel cells, water electrolysers and batteries. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2016-01-13T02:25:53Z 2019-12-06T14:41:28Z 2016-01-13T02:25:53Z 2019-12-06T14:41:28Z 2015 Journal Article Ge, X., Goh, F. W. T., Li, B., Hor, T. S. A., Zhang, J., Xiao, P., et al. (2015). Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media . Nanoscale, 7(19), 9046-9054. 2040-3364 https://hdl.handle.net/10356/81847 http://hdl.handle.net/10220/39682 10.1039/C5NR01272D en Nanoscale © 2015 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, The Royal Society of Chemistry. 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/10.1039/C5NR01272D]. 9 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
description The increasing global energy demand and the depletion of fossil fuels have stimulated intense research on fuel cells and batteries. Oxygen electrocatalysis plays essential roles as the electrocatalytic reduction and evolution of di-oxygen are always the performance-limiting factors of these devices relying on oxygen electrochemistry. A novel perovskite with the formula La(Co0.55Mn0.45)0.99O3−δ (LCMO) is designed from molecular orbital principles. The hydrothermally synthesized LCMO nanorods have unique structural and chemical properties and possess high intrinsic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synergic covalent coupling between LCMO and NrGO enhances the bifunctional ORR and OER activities of the novel LCMO/NrGO hybrid catalyst. The ORR activity of LCMO/NrGO is comparable to the state-of-the-art Pt/C catalyst and its OER activity is competitive to the state-of-the-art Ir/C catalyst. LCMO/NrGO generally outperforms Pt/C and Ir/C with better bifunctional ORR and OER performance and operating durability. LCMO/NrGO represents a new class of low-cost, efficient and durable electrocatalysts for fuel cells, water electrolysers and batteries.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Ge, Xiaoming
Goh, F. W. Thomas
Li, Bing
Hor, T. S. Andy
Zhang, Jie
Xiao, Peng
Wang, Xin
Zong, Yun
Liu, Zhaolin
format Article
author Ge, Xiaoming
Goh, F. W. Thomas
Li, Bing
Hor, T. S. Andy
Zhang, Jie
Xiao, Peng
Wang, Xin
Zong, Yun
Liu, Zhaolin
spellingShingle Ge, Xiaoming
Goh, F. W. Thomas
Li, Bing
Hor, T. S. Andy
Zhang, Jie
Xiao, Peng
Wang, Xin
Zong, Yun
Liu, Zhaolin
Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
author_sort Ge, Xiaoming
title Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
title_short Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
title_full Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
title_fullStr Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
title_full_unstemmed Efficient and durable oxygen reduction and evolution of a hydrothermally synthesized La(Co 0.55 Mn 0.45 ) 0.99 O 3−δ nanorod/graphene hybrid in alkaline media
title_sort efficient and durable oxygen reduction and evolution of a hydrothermally synthesized la(co 0.55 mn 0.45 ) 0.99 o 3−δ nanorod/graphene hybrid in alkaline media
publishDate 2016
url https://hdl.handle.net/10356/81847
http://hdl.handle.net/10220/39682
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