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Unusual Assembly and Conversion of Graphene Quantum Dots into Crystalline Graphite Nanocapsules
Jian Gao1, Chenyu Xu1, Yue Hu1
1Key Laboratory of Cluster Science, Ministry of Education of China, Beijing, Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Abstract:
The development of a facile strategy for conversion of graphene quantum dots (GQDs) into crystalline graphite is of great practical significance and still remains challenging. Herein, rationally assembled crystalline-intercrossed graphite nanocapsules (CI-GNCs) have been realized by a one-step electrochemically induced strategy with the assistance of a soft template, in which the GQDs act as the initial building blocks. The as-prepared CI-GNCs exhibit highly crystalline graphitic nanostructures. Moreover, they possess promising electrocatalytic activity for the oxygen reaction reduction (ORR) in alkaline medium. This simple fabrication technology presents a great advance for synthesizing CI-GNCs composite catalysts, which have potential as new metal-free catalysts for efficient ORR applications.