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N-doped hierarchical porous metal-free catalysts derived from covalent triazine frameworks for the efficient oxygen reduction reaction

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Abstract

The oxygen reduction reaction (ORR) is a core reaction in energy conversion and storage devices. Herein, nitrogen-doped hierarchical micro/mesoporous carbon ORR catalysts derived from covalent triazine frameworks (CTFs) were prepared based on a rational bottom-up strategy. Benefiting from its high specific surface area (1925 m2 g−1), hierarchical micro/mesoporous structure (0–12 nm), three-dimensional conductive network and high pyridinic N and graphitic N content, the optimal CTF-Super P-10 composite catalyst exhibits an onset potential of 0.981 V and a half-wave potential of 0.883 V, with a high limiting current density of around 5.31 mA cm−2 under alkaline conditions. It shows a dominant four-electron pathway, strong stability, and better methanol tolerance than commercial Pt/C in both alkaline conditions and acidic conditions, highlighting a promising strategy for designing high performance metal-free ORR catalysts.

Graphical abstract: N-doped hierarchical porous metal-free catalysts derived from covalent triazine frameworks for the efficient oxygen reduction reaction

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Publication details

The article was received on 09 Aug 2019, accepted on 17 Oct 2019 and first published on 17 Oct 2019


Article type: Paper
DOI: 10.1039/C9CY01597C
Catal. Sci. Technol., 2019, Advance Article

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    N-doped hierarchical porous metal-free catalysts derived from covalent triazine frameworks for the efficient oxygen reduction reaction

    Y. Cao, Y. Zhu, X. Chen, B. S. Abraha, W. Peng, Y. Li, G. Zhang, F. Zhang and X. Fan, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01597C

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