Single atomically anchored iron on graphene quantum dots for a highly efficient oxygen evolution reaction
| Autor: | S.-L. Chu, Anil A. Kashale, C.-Y. Chang, Y.-F. Lin, C.-M. Lee, I-W.P. Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Tafel equation
Materials science Renewable Energy Sustainability and the Environment Graphene Materials Science (miscellaneous) Oxygen evolution Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis Fuel Technology Adsorption Nuclear Energy and Engineering Chemical engineering chemistry law Quantum dot 0210 nano-technology Carbon |
| Zdroj: | Materials Today Energy. 20:100693 |
| ISSN: | 2468-6069 |
| DOI: | 10.1016/j.mtener.2021.100693 |
| Popis: | Single-atom catalysts (SACs) supported on carbon-based materials are very promising for maximizing their electrocatalytic activity. However, carbon-based SACs are primarily bonded with carbons, resulting in an inferior performance in the oxygen evolution reaction (OER). Herein, we develop a novel coordination adsorption strategy for the synthesis of a monodispersed Fe(NO)2 moiety anchored on the nitrogen sites of the nitrogen-doped graphene quantum dots (N-GQDs) to form a Fe(NO)2–N-GQDs complex as an efficient OER catalyst. The resultant Fe(NO)2–N-GQDs complex exhibits a highly stable overpotential of 270 mV at a current density of 10 mA cm−2 and a Tafel slope of 48 mV dec−1 together with long-term durability, which greatly outperforms the state-of-the-art RuO2. Our finding emphasizes the role of electron-transfer resistance changes during a simple synthesis method to enhance electrocatalytic efficiency. Therefore, this work will envision numerous opportunities for creating novel-type carbon-based SACs via nitrogen–metal coordination as highly robust OER catalysts. |
| Databáze: | OpenAIRE |
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