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나노입자 연구단
나노입자 연구단
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Sulfur-Modified Graphitic Carbon Nitride Nanostructures as an Efficient Electrocatalyst for Water Oxidation

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Title
Sulfur-Modified Graphitic Carbon Nitride Nanostructures as an Efficient Electrocatalyst for Water Oxidation
Author(s)
Vinayak S. Kale; Uk Sim; Jiwoong Yang; Kyoungsuk Jin; Sue In Chae; Woo Je Chang; Arun Kumar Sinha; Heonjin Ha; Chan-Cuk Hwang; Junghyun An; Hyo-Ki Hong; Zonghoon Lee; Ki Tae Nam; Taeghwan Hyeon
Publication Date
2017-05
Journal
SMALL, v.13, no.17, pp.1603893 -
Publisher
WILEY-V C H VERLAG GMBH
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-CNx) electrocatalysts are obtained by annealing these melamine nanogeodes in situ with sulfur. The sulfur modification in the g-CNx 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-CNx 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. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/4352
ISSN
1613-6810
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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