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|Title:||Modulation of single atomic Co and Fe sites on hollow carbon nanospheres as oxygen electrodes for rechargeable Zn–air batteries||Authors:||Jose, Vishal
Manalastas, William, Jr.
Nsanzimana, Jean Marie Vianney
|Keywords:||Engineering||Issue Date:||2021||Source:||Jose, V., Hu, H., Edison, E., Manalastas, W. J., Ren, H., Kidkhunthod, P., Sreejith, S., Jayakumar, A., Nsanzimana, J. M. V., Srinivasan, M., Choi, J. & Lee, J. (2021). Modulation of single atomic Co and Fe sites on hollow carbon nanospheres as oxygen electrodes for rechargeable Zn–air batteries. Small Methods, 5(2), 2000751-. https://dx.doi.org/10.1002/smtd.202000751||Journal:||Small Methods||Abstract:||Efficient bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are required for metal air batteries, to replace costly metals, such as Pt and Ir/Ru based compounds, which are typically used as benchmarks for ORR and OER, respectively. Isolated single atomic sites coordinated with nitrogen on carbon supports (M-N-C) have promising performance for replacement of precious metal catalysts. However, most of monometallic M-N-C catalysts demonstrate unsatisfactory bifunctional performance. Herein, a facile way of preparing bimetallic Fe and Co sites entrapped in nitrogen-doped hollow carbon nanospheres (Fe,Co-SA/CS) is explored, drawing on the unique structure and pore characteristics of Zeolitic imidazole frameworks and molecular size of Ferrocene, an Fe containing species. Fe,Co-SA/CS showed an ORR onset potential and half wave potential of 0.96 and 0.86 V, respectively. For OER, (Fe,Co)-SA/CS attained its anodic current density of 10 mA cm at an overpotential of 360 mV. Interestingly, the oxygen electrode activity (ΔE) for (Fe,Co)-SA/CS and commercial Pt/C-RuO is calculated to be 0.73 V, exhibiting the bifunctional catalytic activity of (Fe,Co)-SA/CS. (Fe,Co)-SA/CS evidenced desirable specific capacity and cyclic stability than Pt/C-RuO2 mixture when utilized as an air cathode in a homemade Zinc-air battery.||URI:||https://hdl.handle.net/10356/147555||ISSN:||10.1002/smtd.202000751||DOI:||10.1002/smtd.202000751||Rights:||This is the peer reviewed version of the following article: Jose, V., Hu, H., Edison, E., Manalastas, W. J., Ren, H., Kidkhunthod, P., Sreejith, S., Jayakumar, A., Nsanzimana, J. M. V., Srinivasan, M., Choi, J. & Lee, J. (2021). Modulation of single atomic Co and Fe sites on hollow carbon nanospheres as oxygen electrodes for rechargeable Zn–air batteries. Small Methods, 5(2), 2000751-. https://dx.doi.org/10.1002/smtd.202000751, which has been published in final form at https://doi.org/10.1002/smtd.202000751. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||embargo_20220215||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MSE Journal Articles|
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