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Kang, Yao, Wang, Shuo, Zhu, Siqi, Gao, Haixing, Hui, Kwan San 
ORCID: https://orcid.org/0000-0001-7089-7587, Yuan, Cheng Zong, Yin, Hong, Bin, Feng, Wu, Xi Lin, Mai, Wenjie, Zhu, Ling, Hu, Maocong, Liang, Feng, Chen, Fuming and Hui, Kwun Nam
(2021)
Iron-modulated nickel cobalt phosphide embedded in carbon to boost power density of hybrid sodium–air battery.
Applied Catalysis B: Environmental, 285.
ISSN 0926-3373
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Abstract
Nickel cobalt phosphide (NiCoP) is emerging as a potential electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, its ORR/OER activities are sluggish. Here, we investigated the roles of iron dopants in the Fe-doped NiCoP (Fe–NiCoP) in order to boost its ORR/OER kinetics. The density functional theory (DFT) calculations reveal that the Fe dopant effectively modulates the electron conductivity of NiCoP and reduces binding energies of the reaction intermediates towards rate-determining steps of ORR and OER. A binder-free 3D microflowers morphology of the Fe–NiCoP embedded in the amorphous carbon layer (Fe–NiCoP@C) catalyst on the nickel foam was prepared as the air cathode for the hybrid sodium-air battery (HSAB). The HSAB displays a discharge voltage of 2.74 V at 0.01 mA cm−2 with excellent round trip efficiency of 93.26 % at the 500th cycle and state-of-the-art power density of 621 mW g−1.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | dft calculation,electronic structure reformation,hybrid sodium-air battery,iron doping,nickel cobalt phosphide,catalysis,environmental science(all),process chemistry and technology ,/dk/atira/pure/subjectarea/asjc/1500/1503 |
| Faculty \ School: | Faculty of Science > School of Engineering (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Energy Materials Laboratory |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 09 Feb 2021 01:04 |
| Last Modified: | 16 Dec 2024 01:34 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/79197 |
| DOI: | 10.1016/j.apcatb.2020.119786 |
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