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Nitrogen-Doped Graphene Quantum Dots with Oxygen-Rich Functional Groups

Li, Yan, Zhao, Yang, Cheng, Huhu, Hu, Yue, Shi, Gaoquan, Dai, Liming, Qu, Liangti·2012·Journal of the American Chemical Society

DOI 10.1021/ja206030c

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Abstract

Graphene quantum dots (GQDs) represent a new class of quantum dots with unique properties. Doping GQDs with heteroatoms provides an attractive means of effectively tuning their intrinsic properties and exploiting new phenomena for advanced device applications. Herein we report a simple electrochemical approach to luminescent and electrocatalytically active nitrogen-doped GQDs (N-GQDs) with oxygen-rich functional groups. Unlike their N-free counterparts, the newly produced N-GQDs with a N/C atomic ratio of ca. 4.3% emit blue luminescence and possess an electrocatalytic activity comparable to that of a commercially available Pt/C catalyst for the oxygen reduction reaction (ORR) in an alkaline medium. In addition to their use as metal-free ORR catalysts in fuel cells, the superior luminescence characteristic of N-GQDs allows them to be used for biomedical imaging and other optoelectronic applications.

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Authors: Li, Y., Zhao, Y., Cheng, H., Hu, Y., Shi, G., Dai, L., & Qu, L.
Venue: Journal of the American Chemical Society
Publisher: American Chemical Society (ACS)
Published: 2011-12-09
Volume: 134
Issue: 1
Pages: 15-18
ISSN: 0002-7863 (ISSN-L)
1520-5126
DOI: 10.1021/ja206030c
OpenAlex: W2095211759
Cited by: 2,057
References: 44
FWCI: 47.25
Type: journal article
Language: en
Open access: closed

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Nitrogen-Doped Graphene Quantum Dots with Oxygen-Rich Functional Groups

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