N, S Codoped Carbon Matrix-Encapsulated Co9S8 Nanoparticles as a Highly Efficient and Durable Bifunctional Oxygen Redox Electrocatalyst for Rechargeable Zn–Air Batteries
dc.creator | Lyu D., Yao S., Ali A., Tian Z.Q., Tsiakaras P., Shen P.K. | en |
dc.date.accessioned | 2023-01-31T08:55:36Z | |
dc.date.available | 2023-01-31T08:55:36Z | |
dc.date.issued | 2021 | |
dc.identifier | 10.1002/aenm.202101249 | |
dc.identifier.issn | 16146832 | |
dc.identifier.uri | http://hdl.handle.net/11615/76050 | |
dc.description.abstract | Herein, a N, S co-doped carbon encapsulating Co9S8 nanoparticles (Co9S8@N, S–C) catalyst is successfully synthesized by a new precursor of Co-pyridine coordinated-polymer consisting of 2,6-diacetylpyridine and 4,4′-dithiodianiline. Benefiting from the abundant pore-structure (average pore-size ≈25nm) and unique electronic-properties of the Co9S8 and N, S–C layer, the as-prepared Co9S8@N, S-C exhibits rapid oxygen reduction reaction (ORR) kinetics with high electron transfer number of ≈3.998 and demonstrates a low overpotential of 304 mV for the oxygen evolution reaction (OER). It exhibits a small potential difference of 0.647V for overall ORR/OER activity, outperforming most of the non-precious metal-catalysts previously reported. The rechargeable Zn–Air battery test further demonstrates its excellent activity and stability, in which the battery delivers a maximum power density output of 259 mW cm−2, a specific capacity of 862 mAh gZn−1, and after continuous 110 h operation the charge-discharge round-trip efficiency only reduces by 4.83%. Theoretical calculation studies show that the surface N, S–C layers and Co9S8 can adjust each other's Fermi levels, so that the adsorption energy of Co9S8@N, S–C on O intermediate is more favorable than using Co9S8 and N, S–C alone. This study reveals the structure-function relationship of coated-nanostructures with multifunctional electrocatalytic properties, and provides a feasible strategy for the design of non-noble metal-catalysts. © 2021 Wiley-VCH GmbH | en |
dc.language.iso | en | en |
dc.source | Advanced Energy Materials | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85107458425&doi=10.1002%2faenm.202101249&partnerID=40&md5=ce81d83c903d9b54a4afdf9c51730754 | |
dc.subject | Carbon | en |
dc.subject | Electrocatalysts | en |
dc.subject | Electrolytic reduction | en |
dc.subject | Electron transport properties | en |
dc.subject | Electronic properties | en |
dc.subject | Nanoparticles | en |
dc.subject | Oxygen | en |
dc.subject | Oxygen evolution reaction | en |
dc.subject | Oxygen reduction reaction | en |
dc.subject | Pore size | en |
dc.subject | Pore structure | en |
dc.subject | Precious metals | en |
dc.subject | Reaction kinetics | en |
dc.subject | Synthesis (chemical) | en |
dc.subject | Electrocatalytic properties | en |
dc.subject | Maximum power density | en |
dc.subject | Non-noble metal catalysts | en |
dc.subject | Non-precious metal catalysts | en |
dc.subject | Oxygen evolution reaction (oer) | en |
dc.subject | Potential difference | en |
dc.subject | Structure-function relationship | en |
dc.subject | Theoretical calculations | en |
dc.subject | Zinc air batteries | en |
dc.subject | John Wiley and Sons Inc | en |
dc.title | N, S Codoped Carbon Matrix-Encapsulated Co9S8 Nanoparticles as a Highly Efficient and Durable Bifunctional Oxygen Redox Electrocatalyst for Rechargeable Zn–Air Batteries | en |
dc.type | journalArticle | en |
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