N-doped carbon nanotubes containing a high concentration of single iron atoms for efficient oxygen reduction View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-01-12

AUTHORS

Jin-Cheng Li, Zhi-Qing Yang, Dai-Ming Tang, Lili Zhang, Peng-Xiang Hou, Shi-Yong Zhao, Chang Liu, Min Cheng, Guo-Xian Li, Feng Zhang, Hui-Ming Cheng

ABSTRACT

Fe-N-C has emerged as a promising noble-metal-free catalyst for the oxygen reduction reaction (ORR). However, achieving a catalytic activity comparable to that of Pt in acidic medium remains a great challenge. Here we report a N-doped carbon nanotube (CNT) catalyst in which a high concentration of single Fe atoms has been dispersed (CNT@Fe-N-PC). The catalyst was prepared by a simple and scalable atomic isolation method, in which a metal isolation agent was introduced to isolate Fe atoms and was then evaporated to produce abundant micropores that host single Fe atom active sites. The CNT@Fe-N-PC catalyst contained a high concentration of single Fe atom active sites and exhibited ultrahigh ORR activity with a half-wave potential of 0.82 V, comparable to that of Pt/C in an acidic medium. A high concentration of Fe-Nx active sites was created on a flexible single-wall CNT film and carbon cloth using this technique, and these materials showed even better ORR performance, that is, 40–60 mV more positive onset potentials than those of a commercial Pt/C catalyst. These catalysts exhibit excellent catalytic activity, good durability and low cost, and show great potential for commercial use as substitutes for current Pt-based catalysts. More... »

PAGES

e461

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/am.2017.212

DOI

http://dx.doi.org/10.1038/am.2017.212

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1100347161


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N-Triples is a line-based linked data format ideal for batch operations.

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Turtle is a human-readable linked data format.

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RDF/XML is a standard XML format for linked data.

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This table displays all metadata directly associated to this object as RDF triples.

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