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

Citation data:

Small (Weinheim an der Bergstrasse, Germany), ISSN: 1613-6829, Vol: 13, Issue: 17

Publication Year:
2017
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Abstract Views 9
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Readers 14
Citations 4
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21875
PMID:
28218825
DOI:
10.1002/smll.201603893
Author(s):
Kale, Vinayak S.; Sim, Uk; Yang, Jiwoong; Jin, Kyoungsuk; Chae, Sue In; Chang, Wee Je; Sinha, Arun Kumar; Ha, Heonjin; Hwang, Chan-Cuk; An, Junghyun; Hong, Hyo-Ki; Lee, Zonghoon; Nam, Ki Tae; Hyeon, Taeghwan Show More Hide
Publisher(s):
Wiley-Blackwell; WILEY-V C H VERLAG GMBH
Tags:
Biochemistry, Genetics and Molecular Biology; Materials Science; Engineering
article description
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 ) electrocatalysts are obtained by annealing these melamine nanogeodes in situ with sulfur. The sulfur modification in the g-CN 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 nanostructures show superior performance, requiring a lower overpotential (290 mV) to achieve a current density of 10 mA cm and a Tafel slope of 120 mV dec 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.