Microwave-assisted solvothermal preparation of nitrogen and sulfur co-doped reduced graphene oxide and graphene quantum dots hybrids for highly efficient oxygen reduction
| Autor: | Dongliang Yang, Ting Yu, Yanlong Wang, Jingzhi Shang, Guangqin Qi, Huanping Yang, Zhimin Luo, Lihui Yuwen, Wei Huang, Lianhui Wang |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Graphene Inorganic chemistry Oxide chemistry.chemical_element General Chemistry Electrocatalyst Sulfur Fluorescence law.invention Catalysis chemistry.chemical_compound chemistry Chemical engineering law Quantum dot General Materials Science Methanol |
| Zdroj: | J. Mater. Chem. A. 2:20605-20611 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c4ta05096g |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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