A simple microwave process for the preparation of cobalt oxide nanoparticles supported on carbon nanotubes for electrocatalytic applications
| Autor: | Michael Bron, Abu Bakr Ahmed Amine Nassr, Tintula Kottakkat |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Thermal decomposition chemistry.chemical_element Nanoparticle 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Electrochemical energy conversion 0104 chemical sciences Catalysis law.invention chemistry Chemical engineering law General Materials Science Electrical and Electronic Engineering 0210 nano-technology Cobalt Cobalt oxide |
| Zdroj: | Journal of Solid State Electrochemistry. 24:131-136 |
| ISSN: | 1433-0768 1432-8488 |
| Popis: | Cobalt oxide nanoparticles supported on multiwalled carbon nanotubes (CoOx/CNTs) were prepared by a facile and rapid solid-state synthesis using microwave irradiation. Thermal decomposition of a cobalt precursor under microwave irradiation leads to the formation of oxides of cobalt in the nanoparticle range (mainly 10–15 nm). X-ray diffraction reveals the existence of crystalline CoO and Co3O4. CoOx/CNTs show superior electrochemical activity towards oxygen reduction reaction (ORR) in alkaline media with a near 4-electron transfer. Initial electrochemical stability tests of the CoOx/CNTs for ORR in alkaline solution under potentiostatic conditions show ~ 88% retention in performance after continuous operation for 6 h. The results on activity and stability of CoOx/CNT catalysts demonstrate that this facile and rapid synthesis might pave the way to a quick and cheap preparation of catalysts for applications in electrochemical energy conversion. |
| Databáze: | OpenAIRE |
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