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Hierarchical carbon-silicon nanowire heterostructures for the hydrogen evolution reaction

Cited 12 time in Web of Science Cited 12 time in Scopus
Authors
Moon, Joonhee; Sim, Uk; Kim, Dong Jin; Ahn, Hyo-Yong; An, Junghyun; Ha, Heonjin; Choi, Kyoung Soon; Jeon, Cheolho; Lee, Jouhahn; Nam, Ki Tae; Hong, Byung Hee
Issue Date
2018-08
Citation
Nanoscale, Vol.10 No.29, pp.13936-13941
Abstract
Silicon nanowires (SiNWs) opened up exciting possibilities in a variety of research fields due to their unique anisotropic morphologies, facile tuning capabilities, and accessible fabrication methods. The SiNW-based photoelectrochemical (PEC) conversion has recently been known to provide an efficiency superior to that of various photo-responsive semiconductor heterostructures. However, a challenge still remains in designing optimum structures to minimize photo-oxidation and photo-corrosion of the Si surface in a liquid electrolyte. Here, we report a simple method to synthesize hierarchically branched carbon nanowires (CNWs) on SiNWs utilizing copper vapor as the catalyst in a chemical vapor deposition (CVD) process, which exhibits outstanding photo catalytic activities for hydrogen generation along with excellent chemical stability against oxidation and corrosion. Thus, we believe that the CNW-SiNW photoelectrodes would provide a new route to developing high-performing cost-effective catalysts essential for advanced energy conversion and storage technologies.
ISSN
2040-3364
URI
https://hdl.handle.net/10371/172228
DOI
https://doi.org/10.1039/c8nr02262c
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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