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

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

Abstract

Co-N-C electrocatalysts have attracted great attention in electrocatalytic ORR (oxygen reduction reaction) field. In this work, we propose to prepare Co 2 N nanoparticles embedded N-doped mesoporous carbon by a facile method including in situ copolymerization and pyrolysis under NH 3 atmosphere. The results show that more N atoms can be doped in carbon framework by NH 3 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 m 2 g −1 ), and it also exhibited superior electrocatalytic ORR performance in terms of E onset (−0.038 V vs. SCE), E 1/2 (−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.

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

• Journal Article Type: Article
• Acceptance Date: Dec 22, 2018
• Online Publication Date: Dec 24, 2018
• Publication Date: Apr 15, 2019
• Deposit Date: Mar 19, 2019
• Publicly Available Date: Dec 25, 2019
• Journal: Applied Surface Science
• Print ISSN: 0169-4332
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 473
• Pages: 555-563
• DOI: https://doi.org/10.1016/j.apsusc.2018.12.204
• Keywords: Surfaces, Coatings and Films
• Public URL: https://hull-repository.worktribe.com/output/1198557
• 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.
• Contract Date: Jun 5, 2019