Self-assembly of N doped 3D porous carbon frameworks from carbon quantum dots and its application for oxygen reduction reaction

Self-assembly of N doped 3D porous carbon frameworks from carbon quantum dots and its application... Developing low-cost and high-performance metal-free oxygen reduction reaction (ORR) catalysts for fuel cells is highly desirable but still full of challenges. In this study, Nitrogen-doped three-dimensional (3D) porous carbon frameworks (NCF) derived from zero-dimensional carbon quantum dots have been prepared by a simple one-step self-assembly technique. The resultant NCF-800 (carbonized at 800 °C) possesses unique 3D porous framework architecture, large specific surface area (171 cm2 g−1) and abundant defect sites. As a catalyst for ORR, the optimized NCF-800 displays a positive onset potential at 0.87 V (vs. RHE), which is roughly 60 mV more negative than that of Pt/C (0.93 V). Additionally, the NCF-800 exhibits longer-term stability and strong endurance to methanol in alkaline electrolyte, which are much superior to those of Pt/C. Considering the outstanding activity of NCF-800, it can be worked as a prospective metal-free ORR catalyst for fuel cells in the future. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Self-assembly of N doped 3D porous carbon frameworks from carbon quantum dots and its application for oxygen reduction reaction

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-017-7091-3
Publisher site
See Article on Publisher Site

Abstract

Developing low-cost and high-performance metal-free oxygen reduction reaction (ORR) catalysts for fuel cells is highly desirable but still full of challenges. In this study, Nitrogen-doped three-dimensional (3D) porous carbon frameworks (NCF) derived from zero-dimensional carbon quantum dots have been prepared by a simple one-step self-assembly technique. The resultant NCF-800 (carbonized at 800 °C) possesses unique 3D porous framework architecture, large specific surface area (171 cm2 g−1) and abundant defect sites. As a catalyst for ORR, the optimized NCF-800 displays a positive onset potential at 0.87 V (vs. RHE), which is roughly 60 mV more negative than that of Pt/C (0.93 V). Additionally, the NCF-800 exhibits longer-term stability and strong endurance to methanol in alkaline electrolyte, which are much superior to those of Pt/C. Considering the outstanding activity of NCF-800, it can be worked as a prospective metal-free ORR catalyst for fuel cells in the future.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: May 18, 2017

References

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