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A microwave-assisted decoration of carbon nanotubes with Fe3O4 nanoparticles for efficient electrocatalytic oxygen reduction reaction.
- Source :
-
Journal of Alloys & Compounds . May2023, Vol. 943, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- The electrocatalytic oxygen reduction process (ORR) is one of the possible methods for producing sustainable energy, but its slow kinetics necessitates the use of inexpensive and efficient catalysts. Herein, Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) were loaded onto multiwall carbon nanotubes (Fe 3 O 4 @CNTs) using a single-step microwave-assisted strategy. The prepared Fe 3 O 4 @CNTs composite was characterized via multiple analytical techniques, and the results suggested a thin film of Fe 3 O 4 NPs coating on the CNT surface, having a high specific surface area and pore volume. The prepared Fe 3 O 4 @CNTs composite exhibited a positive shift in ORR half-wave potential of 240 and 20 mV with respect to Fe 3 O 4 and 20% Pt/C catalysts, respectively. The improved ORR activity of the Fe 3 O 4 @CNTs composite can be attributed to the synergetic interaction between CNTs and Fe 3 O 4 , which is also supported by theoretical simulations. Furthermore, the Fe 3 O 4 @CNTs composite showed superior cycling stability and remarkable methanol tolerance, proving its applicability as an ORR catalyst at a practical level. This research will aid in the development of microwave-based strategies for producing efficient ORR catalysts. It will also give a basic understanding of the relationships between composition, structure, and activity. [Display omitted] • A microwave-based approach was adopted to prepare Fe 3 O 4 @CNTs nanocomposite. • The structural and surface features of Fe 3 O 4 @CNTs composite was fully characterized. • Fe 3 O 4 @CNTs composite showed better ORR activity, durability and methanol tolerance. • DFT calculations were used to explain Fe 3 O 4 @CNTs' enhanced ORR activity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OXYGEN reduction
*CARBON nanotubes
*IRON oxide nanoparticles
*IRON oxides
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 943
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 161988597
- Full Text :
- https://doi.org/10.1016/j.jallcom.2023.169067