Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction

Abstract The study of atomically dispersed metal‐nitrogen electrocatalysts is still limited in terms of understanding their catalytic mechanism because of the inability to precisely regulate the coordination number and type of N in combination with the metal elements. Inspired by the high catalytic...

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Autores principales:	Lei Yan, Liyan Xie, Xi‐Lin Wu, Mengying Qian, Jianrong Chen, Yijun Zhong, Yong Hu
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	oxygen reduction reaction pH‐universal pyrrole‐type N single‐atom catalysts Zn–air batteries Production of electric energy or power. Powerplants. Central stations TK1001-1841
Acceso en línea:	https://doaj.org/article/464772ff4e0841c397e3c16960cdc64d
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spelling	oai:doaj.org-article:464772ff4e0841c397e3c16960cdc64d2021-11-24T14:45:30ZPrecise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction2637-936810.1002/cey2.135https://doaj.org/article/464772ff4e0841c397e3c16960cdc64d2021-11-01T00:00:00Zhttps://doi.org/10.1002/cey2.135https://doaj.org/toc/2637-9368Abstract The study of atomically dispersed metal‐nitrogen electrocatalysts is still limited in terms of understanding their catalytic mechanism because of the inability to precisely regulate the coordination number and type of N in combination with the metal elements. Inspired by the high catalytic activity and selectivity of natural enzymes, herein, we have designed and fabricated ultrathin carbon nanosheet‐supported Mn single‐atom catalysts (SACs) with a precise pyrrole‐type Mn‐N4 (PT‐MnN4) configuration using a bio‐mimicking strategy. The PT‐MnN4 SACs display outstanding oxygen reduction reaction (ORR) activity, with a half‐wave potential (E1/2) of 0.88 V (vs. revisible hydrogen electrode [RHE]) and extremely high stability in alkaline media. Moreover, superior ORR activities are also obtained, E1/2 of 0.73 V and 0.63 V in acid and neutral electrolytes, respectively, indicating the efficient pH‐universal ORR performances. The assembled zinc–air battery using the PT‐MnN4 SACs as air cathodes exhibits a high peak power density (175 mW cm−2) and long‐term stability up to 150 h, implying its promising application in metal–air batteries. This study has paved the way toward the rational design and precise regulation of single‐atom electrocatalysts.Lei YanLiyan XieXi‐Lin WuMengying QianJianrong ChenYijun ZhongYong HuWileyarticleoxygen reduction reactionpH‐universalpyrrole‐type Nsingle‐atom catalystsZn–air batteriesProduction of electric energy or power. Powerplants. Central stationsTK1001-1841ENCarbon Energy, Vol 3, Iss 6, Pp 856-865 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	oxygen reduction reaction pH‐universal pyrrole‐type N single‐atom catalysts Zn–air batteries Production of electric energy or power. Powerplants. Central stations TK1001-1841
spellingShingle	oxygen reduction reaction pH‐universal pyrrole‐type N single‐atom catalysts Zn–air batteries Production of electric energy or power. Powerplants. Central stations TK1001-1841 Lei Yan Liyan Xie Xi‐Lin Wu Mengying Qian Jianrong Chen Yijun Zhong Yong Hu Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
description	Abstract The study of atomically dispersed metal‐nitrogen electrocatalysts is still limited in terms of understanding their catalytic mechanism because of the inability to precisely regulate the coordination number and type of N in combination with the metal elements. Inspired by the high catalytic activity and selectivity of natural enzymes, herein, we have designed and fabricated ultrathin carbon nanosheet‐supported Mn single‐atom catalysts (SACs) with a precise pyrrole‐type Mn‐N4 (PT‐MnN4) configuration using a bio‐mimicking strategy. The PT‐MnN4 SACs display outstanding oxygen reduction reaction (ORR) activity, with a half‐wave potential (E1/2) of 0.88 V (vs. revisible hydrogen electrode [RHE]) and extremely high stability in alkaline media. Moreover, superior ORR activities are also obtained, E1/2 of 0.73 V and 0.63 V in acid and neutral electrolytes, respectively, indicating the efficient pH‐universal ORR performances. The assembled zinc–air battery using the PT‐MnN4 SACs as air cathodes exhibits a high peak power density (175 mW cm−2) and long‐term stability up to 150 h, implying its promising application in metal–air batteries. This study has paved the way toward the rational design and precise regulation of single‐atom electrocatalysts.
format	article
author	Lei Yan Liyan Xie Xi‐Lin Wu Mengying Qian Jianrong Chen Yijun Zhong Yong Hu
author_facet	Lei Yan Liyan Xie Xi‐Lin Wu Mengying Qian Jianrong Chen Yijun Zhong Yong Hu
author_sort	Lei Yan
title	Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
title_short	Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
title_full	Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
title_fullStr	Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
title_full_unstemmed	Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction
title_sort	precise regulation of pyrrole‐type single‐atom mn‐n4 sites for superior ph‐universal oxygen reduction
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/464772ff4e0841c397e3c16960cdc64d
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Precise regulation of pyrrole‐type single‐atom Mn‐N4 sites for superior pH‐universal oxygen reduction

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