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Lee, Zonghoon
Atomic-Scale Electron Microscopy Lab.
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Sulfur-Modified Graphitic Carbon Nitride Nanostructures as an Efficient Electrocatalyst for Water Oxidation

Author(s)
Kale, Vinayak S.Sim, UkYang, JiwoongJin, KyoungsukChae, Sue InChang, Wee JeSinha, Arun KumarHa, HeonjinHwang, Chan-CukAn, JunghyunHong, Hyo-KiLee, ZonghoonNam, Ki TaeHyeon, Taeghwan
Issued Date
2017-05
DOI
10.1002/smll.201603893
URI
https://scholarworks.unist.ac.kr/handle/201301/21875
Fulltext
http://onlinelibrary.wiley.com/doi/10.1002/smll.201603893/abstract
Citation
SMALL, v.13, no.17, pp.1603893
Abstract
There is an urgent need to develop metal-free, low cost, durable, and highly efficient catalysts for industrially important oxygen evolution reactions. Inspired by natural geodes, unique melamine nanogeodes are successfully synthesized using hydrothermal process. Sulfur-modified graphitic carbon nitride (S-modified g-CN x ) electrocatalysts are obtained by annealing these melamine nanogeodes in situ with sulfur. The sulfur modification in the g-CN x structure leads to excellent oxygen evolution reaction activity by lowering the overpotential. Compared with the previously reported nonmetallic systems and well-established metallic catalysts, the S-modified g-CN x nanostructures show superior performance, requiring a lower overpotential (290 mV) to achieve a current density of 10 mA cm-2 and a Tafel slope of 120 mV dec-1 with long-term durability of 91.2% retention for 18 h. These inexpensive, environmentally friendly, and easy-to-synthesize catalysts with extraordinary performance will have a high impact in the field of oxygen evolution reaction electrocatalysis.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1613-6810
Keyword
OXYGEN EVOLUTION CATALYSTSHYDROGEN EVOLUTIONENERGY-CONVERSIONIN-SITUFIBER PAPERNANOSHEETSPHOTOCATALYSTSGRAPHENESEMICONDUCTORSNANOPARTICLES

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