Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Nitrogen-doped hollow carbon nanoflowers from a preformed covalent triazine framework for metal-free bifunctional electrocatalysis

Author affiliations

Abstract

Fabrication of nitrogen-doped hollow carbon nanostructures is of great importance for achieving efficient electron and ion transport as a metal-free electrocatalyst. Herein, we report a step-wise polymerization and carbonization route to prepare N-doped hollow carbon nanoflowers (N-HCNFs) with a high nitrogen content up to 5.3 at%. A preformed covalent triazine framework (CTF) network assembled on a melamine-cyanuric acid (MCA) supermolecular crystal was achieved via a step-wise polymerization. The subsequent carbonization was conducted to obtain hollow and porous carbon materials with a unique flower-shape. Excellent electrochemical oxygen reduction reaction (ORR) performance with a positive half-wave potential of 0.84 V (vs. RHE) was achieved with excellent stability and methanol resistance in alkaline media. Furthermore, for the hydrogen evolution reaction (HER), a low overpotential of 243 mV at a current density of 10 mA cm−2 and a small Tafel slope of 111 mV dec−1 in acidic media were shown.

Graphical abstract: Nitrogen-doped hollow carbon nanoflowers from a preformed covalent triazine framework for metal-free bifunctional electrocatalysis

Back to tab navigation

Supplementary files

Article information


Submitted
08 Jun 2020
Accepted
18 Jun 2020
First published
18 Jun 2020

Nanoscale, 2020, Advance Article
Article type
Communication

Nitrogen-doped hollow carbon nanoflowers from a preformed covalent triazine framework for metal-free bifunctional electrocatalysis

Y. Zheng, S. Chen, H. Song, H. Guo, K. A. I. Zhang, C. Zhang and T. Liu, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR04346J

Social activity

Search articles by author

Spotlight

Advertisements