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Published in: Journal of Materials Science 9/2018

09-01-2018 | Energy materials

Metal–organic-framework-derived Co/nitrogen-doped porous carbon composite as an effective oxygen reduction electrocatalyst

Authors: Tianrong Zhan, SiSi Lu, Haoqing Rong, Wanguo Hou, Hongni Teng, Yonghong Wen

Published in: Journal of Materials Science | Issue 9/2018

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Abstract

A Co-metal–organic-framework (MOF) crystal has been hydrothermally synthesized. Then the corresponding Co/nitrogen-doped porous carbon (Co/NPC) composite is fabricated by direct pyrolyzation of MOF without any precursor additive. The results reveal that the MOF-derived Co/NPC exhibits a porous structure with a surface area of 412 m2 g−1 and a narrow pore size distribution (from 1.8 to 4.9 nm). The doped N mainly occurs in pyridine N and graphitic N types with total content as 4.11 at.%, which is originated from the N-based ligands in MOF. As an efficient oxygen reduction reaction (ORR) catalyst, Co/NPC shows a more positive onset potential (0.91 V vs. RHE) with a diffusion-limited current density of 5.46 mA cm−2 at 0.3 V (vs. RHE). The rotating disk electrode and rotating ring-disk electrode results suggest that the Co/NPC catalyst experiences a nearly 4e pathway with a stronger methanol tolerance and better durability than commercial Pt/C catalyst in 0.1 M KOH. The excellent ORR catalytic activity of Co/NPC can be attributed to the N-doped porous carbon structure with incorporated metallic Co active species. This work affords a new strategy for preparation of non-noble metal ORR catalysts employing MOF as a precursor.

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Appendix
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Metadata
Title
Metal–organic-framework-derived Co/nitrogen-doped porous carbon composite as an effective oxygen reduction electrocatalyst
Authors
Tianrong Zhan
SiSi Lu
Haoqing Rong
Wanguo Hou
Hongni Teng
Yonghong Wen
Publication date
09-01-2018
Publisher
Springer US
Published in
Journal of Materials Science / Issue 9/2018
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-1989-x

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