4.7 Article

Graphitic carbon wrapped Co on Zn, Co, N-codoped 3D tremella-like carbon with abundant nanocages for high-performance oxygen reduction

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 48, Issue 9, Pages 3402-3412

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.10.1900360-3199

Keywords

5-Azacytosine; Nanocages; One-step coordination pyrolysis; Electrocatalyst; Oxygen reduction reaction

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In order to develop green and renewable energy, it is crucial to design and synthesize non-precious metal catalysts with low-cost, high efficiency, and robust stability for oxygen reduction reaction (ORR). In this study, graphitic carbon wrapped Co on Zn, Co, N-codoped 3D tremella-like carbon with abundant nanocages (GCo/Zn, Co, N-TCs) were synthesized by one-step coordination pyrolysis in the presence of azacytosine. The resulting G-Co/Zn, Co, N-TCs exhibited remarkable ORR activity and excellent stability, outperforming the control groups and commercial Pt/C under alkaline condition.
To develop green and renewable energy, subtle design and synthesis of non-precious metal catalysts with low-price, high-efficiency, and robust stability are of paramount significance for oxygen reduction reaction (ORR). In this study, we synthesized graphitic carbon wrapped Co on Zn, Co, N-codoped 3D tremella-like carbon with abundant nanocages (GCo/Zn, Co, N-TCs) by one-step coordination pyrolysis in the presence of azacytosine. The pyrolysis temperature and Zn/Co feeding ratio were carefully investigated. Integrating the unique structure and synergistic effect of the bimetals, the resulting G-Co/Zn, Co, N-TCs exhibited remarkable ORR activity (Eonset = 0.99 V; E1/2 = 0.88 V vs. RHE), and excellent stability (only 13 mV negative shift of E1/2 after scanning 2000 cycles), outperforming the control groups and commercial Pt/C under alkaline condition. This research presents some precious viewpoints for fabricating advanced N- and transition metal-dual doped carbon electrocatalysts in energy conversion and storage correlated devices. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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