Microwave-assisted solvothermal preparation of nitrogen and sulfur co-doped reduced graphene oxide and graphene quantum dots hybrids for highly efficient oxygen reduction

作者：Luo, Zhimin; Yang, Dongliang; Qi, Guangqin; Shang, Jingzhi; Yang, Huanping; Wang, Yanlong; Yuwen, Lihui; Yu, Ting; Huang, Wei; Wang, Lianhui^*

来源：Journal of Materials Chemistry A, 2014, 2(48): 20605-20611.

DOI：10.1039/c4ta05096g

• METAL-FREE ELECTROCATALYST
• CARBON NANOTUBES
• ELECTROCHEMICAL AVENUE
• FUNCTIONAL-GROUPS
• CATALYST SUPPORT
• FUEL-CELLS
• NANOCRYSTALS
• PERFORMANCE
• ELECTRODE
• POLYMER

A facile solvothermal method assisted by microwave irradiation was developed for preparing nitrogen and sulfur co-doped reduced graphene oxide functionalized with fluorescent graphene quantum dots (N,S-RGO/GQDs). Graphene quantum dots (GQDs) show high fluorescence and excitation-dependent fluorescent properties. The resultant N, S-RGO/GQDs hybrids as a kind of metal-free electrocatalyst were demonstrated to have good catalytic properties with long-term operational stability and tolerance to the crossover effects of methanol for oxygen reduction via a four-electron pathway in alkaline solution. This research not only develops a low-cost, economic and scalable approach for preparing a metal-free electrocatalyst for the oxygen reduction reaction (ORR), but also produces nitrogen and sulfur co-doped graphene quantum dots (N,S-GQDs) with high fluorescent characteristics.

• 出版日期2014
• 单位南京邮电大学; 浙江科技学院