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


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2017-12

AUTHORS

Binling Chen, Guiping Ma, Yanqiu Zhu, Yongde Xia

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. More... »

PAGES

5266

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-017-05636-y

DOI

http://dx.doi.org/10.1038/s41598-017-05636-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1090553735

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/28706250


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