Hollow CoFe-based hybrid composites derived from unique S-modulated coordinated transition bimetal complexes for efficient oxygen evolution from water splitting under alkaline conditions
- Authors
- Nam, Dukhyun; Lee, Geunhyeong; Kim, Jooheon
- Issue Date
- Sep-2022
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v.51, no.37, pp 14250 - 14259
- Pages
- 10
- Journal Title
- DALTON TRANSACTIONS
- Volume
- 51
- Number
- 37
- Start Page
- 14250
- End Page
- 14259
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58793
- DOI
- 10.1039/d2dt02415b
- ISSN
- 1477-9226
1477-9234
- Abstract
- The oxygen evolution reaction (OER) is an important reaction in water splitting. However, the high cost and slow-rate catalysts hinder commercial applications. Although an important process for manufacturing of hollow structures, it is difficult to construct complicated hollow structures with an excellent and regulable shape for multi-component materials. In this study, we demonstrate that sulfur-Co,Fe bimetallic nitrogen carbon hollow composite hybrids (x-S-CoFe@NC) can be synthesized by regulating the amount of sulfur and using the hydrothermal method. For OER, 32-S-CoFe@NC exhibits excellent electrocatalytic activity with a low overpotential of 232 mV, which is higher than those of 0-S-CoFe@NC (270 mV), 23-S-CoFe@NC (247 mV), and RuO2 (243 mV) catalysts at 10 mA cm(-2). In addition, with air as the cathode, a rechargeable Zn-air battery with outstanding long-life cycling stability for 80 hours based on 32-CoFe@NC + Pt/C is proposed. The advanced technique described here supplies a new route for preparing hollow transition bimetal carbon hybrids with an adjustable composite arrangement for electrocatalysis and water splitting.
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