Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions

Abstract A series of nanocomposites of cobalt embedded in N-doped nanoporous carbons, carbon nanotubes or hollow carbon onions have been synthesized by a one-step carbonization of metal-organic-framework ZIF-67. The effect of the carbonization temperature on the structural evolution of the resulting...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Binling Chen, Guiping Ma, Yanqiu Zhu, Yongde Xia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c113c32269e444e1b29db7febd19c36c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c113c32269e444e1b29db7febd19c36c
record_format	dspace
spelling	oai:doaj.org-article:c113c32269e444e1b29db7febd19c36c2021-12-02T16:06:31ZMetal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions10.1038/s41598-017-05636-y2045-2322https://doaj.org/article/c113c32269e444e1b29db7febd19c36c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05636-yhttps://doaj.org/toc/2045-2322Abstract A series of nanocomposites of cobalt embedded in N-doped nanoporous carbons, carbon nanotubes or hollow carbon onions have been synthesized by a one-step carbonization of metal-organic-framework ZIF-67. The effect of the carbonization temperature on the structural evolution of the resulting nanocomposites has been investigated in detail. Among the as-synthesized materials, the cobalt/nanoporous N-doped carbon composites have demonstrated excellent electrocatalytic activities and durability towards oxygen reduction reaction in alkaline medium. Compared to the benchmark Pt/C catalyst, the optimized Co@C-800 (carbonized at 800 °C) exhibited high oxygen reduction reaction activity with an onset potential of 0.92 V, and a half-wave potential of 0.82 V. Moreover, the optimized Co@C-800 also showed enhanced electrocatalytic activity towards oxygen evolution reaction from water splitting, with a low onset potential of 1.43 V and a potential of 1.61 V at 10 mA cm−2 current density. This work offered a simple solution to develop metal-organic-framework-derived materials for highly efficient electrochemical applications.Binling ChenGuiping MaYanqiu ZhuYongde XiaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Binling Chen Guiping Ma Yanqiu Zhu Yongde Xia Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
description	Abstract A series of nanocomposites of cobalt embedded in N-doped nanoporous carbons, carbon nanotubes or hollow carbon onions have been synthesized by a one-step carbonization of metal-organic-framework ZIF-67. The effect of the carbonization temperature on the structural evolution of the resulting nanocomposites has been investigated in detail. Among the as-synthesized materials, the cobalt/nanoporous N-doped carbon composites have demonstrated excellent electrocatalytic activities and durability towards oxygen reduction reaction in alkaline medium. Compared to the benchmark Pt/C catalyst, the optimized Co@C-800 (carbonized at 800 °C) exhibited high oxygen reduction reaction activity with an onset potential of 0.92 V, and a half-wave potential of 0.82 V. Moreover, the optimized Co@C-800 also showed enhanced electrocatalytic activity towards oxygen evolution reaction from water splitting, with a low onset potential of 1.43 V and a potential of 1.61 V at 10 mA cm−2 current density. This work offered a simple solution to develop metal-organic-framework-derived materials for highly efficient electrochemical applications.
format	article
author	Binling Chen Guiping Ma Yanqiu Zhu Yongde Xia
author_facet	Binling Chen Guiping Ma Yanqiu Zhu Yongde Xia
author_sort	Binling Chen
title	Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
title_short	Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
title_full	Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
title_fullStr	Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
title_full_unstemmed	Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
title_sort	metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c113c32269e444e1b29db7febd19c36c
work_keys_str_mv	AT binlingchen metalorganicframeworksderivedcobaltembeddedinvariouscarbonstructuresasbifunctionalelectrocatalystsforoxygenreductionandevolutionreactions AT guipingma metalorganicframeworksderivedcobaltembeddedinvariouscarbonstructuresasbifunctionalelectrocatalystsforoxygenreductionandevolutionreactions AT yanqiuzhu metalorganicframeworksderivedcobaltembeddedinvariouscarbonstructuresasbifunctionalelectrocatalystsforoxygenreductionandevolutionreactions AT yongdexia metalorganicframeworksderivedcobaltembeddedinvariouscarbonstructuresasbifunctionalelectrocatalystsforoxygenreductionandevolutionreactions
_version_	1718384987279982592

Metal-organic-frameworks derived cobalt embedded in various carbon structures as bifunctional electrocatalysts for oxygen reduction and evolution reactions

Ejemplares similares