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Co2N nanoparticles embedded N-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction

Guo, Dakai; Tian, Zhengfang; Wang, Jiacheng; Ke, Xuebin; Zhu, Yufang

Authors

Dakai Guo

Zhengfang Tian

Jiacheng Wang

Yufang Zhu

Abstract

Co-N-C electrocatalysts have attracted great attention in electrocatalytic ORR (oxygen reduction reaction) field. In this work, we propose to prepare Co2N nanoparticles embedded N-doped mesoporous carbon by a facile method including in situ copolymerization and pyrolysis under NH3 atmosphere. The results show that more N atoms can be doped in carbon framework by NH3 pyrolysis, it is also found that pyrolysis temperature and Co content can influence the ORR performance of samples. The sample prepared by adding Co precursor and pyrolysis at 700 °C has high N content (11.86 at.%) and relative large specific surface area (362 m2 g−1), and it also exhibited superior electrocatalytic ORR performance in terms of Eonset (−0.038 V vs. SCE), E1/2 (−0.126 V vs. SCE) and large current density (5.22 mA cm−2). Additionally, the sample also shows better stability and resistance to methanol poisoning than Pt/C catalyst. The synergistic effect of Co-N active centers and hierarchical porous structures contribute the excellent electrocatalytic activity, which are considering as alternative catalysts for ORR in full cells.

Journal Article Type Article
Publication Date Apr 15, 2019
Journal Applied Surface Science
Print ISSN 0169-4332
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 473
Pages 555-563
Institution Citation Guo, D., Tian, Z., Wang, J., Ke, X., & Zhu, Y. (2019). Co2N nanoparticles embedded N-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction. Applied Surface Science, 473, 555-563. https://doi.org/10.1016/j.apsusc.2018.12.204
DOI https://doi.org/10.1016/j.apsusc.2018.12.204
Keywords Surfaces, Coatings and Films
Publisher URL https://www.sciencedirect.com/science/article/pii/S0169433218335487?via%3Dihub
Additional Information This article is maintained by: Elsevier; Article Title: Co2N nanoparticles embedded N-doped mesoporous carbon as efficient electrocatalysts for oxygen reduction reaction; Journal Title: Applied Surface Science; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.apsusc.2018.12.204; Content Type: article; Copyright: © 2018 Elsevier B.V. All rights reserved.