- Title
- Highly ordered iron oxide-mesoporous fullerene nanocomposites for oxygen reduction reaction and supercapacitor applications
- Creator
- Benzigar, Mercy R.; Joseph, Stalin; Vinu, Ajayan; Saianand, Gopalan; Gopalan, Anantha-Iyengar; Sarkar, Sujoy; Srinivasan, Sampath; Park, Dae-Hwan; Kim, Sungho; Talapaneni, Siddulu Naidu; Ramadass, Kavitha
- Relation
- ARC.DP170104478 http://purl.org/au-research/grants/arc/DP170104478
- Relation
- Microporous and Mesoporous Materials Vol. 285, Issue 1 September 2019, p. 21-31
- Publisher Link
- http://dx.doi.org/10.1016/j.micromeso.2019.04.071
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- In this study, we report a facile synthetic strategy to embed ultra-small iron oxide nanoparticles within the channels of highly ordered mesoporous fullerene (C60) (Fe-MFC60-T, where T denotes the temperature of the template synthesis). The present work is judicially designed to form the hematite phase of iron oxide (α-Fe2O3) nanoparticles (NPs) through the subsequent calcination of Fe-MFC60-T. The Fe-MFC60-T materials were analysed comprehensively for obtaining their physico-chemical properties. Among the materials studied, Fe-MFC60-150 exhibits a unique doughnut-shaped morphology with a high specific surface area (∼598 m2 g−1), crystalline wall structure, and well-ordered porosity. The Fe-MFC60-150 displays an adequate oxygen reduction reaction (ORR) activity with a positive onset potential at 0.85 V (vs RHE) and half wave potential at 0.78 V (vs RHE), low Tafel slope (66 mV per decade), high exchange current density (1.2 × 10−10 A cm−2), and good tolerance towards methanol crossover. We also demonstrate that Fe-MFC60-150 is capable of delivering a specific capacitance of 112.4 F g−1 at 0.1 A g−1. The electrochemical performance of Fe-MFC60-150 towards ORR and supercapacitor can be ascribed to the synergistic coupling effects between the active sites of α-Fe2O3 and MFC60.
- Subject
- mesoporous carbon; nanoporous carbon; nanotemplating; mesoporous silica; energy
- Identifier
- http://hdl.handle.net/1959.13/1470705
- Identifier
- uon:48541
- Identifier
- ISSN:1387-1811
- Language
- eng
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