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Hierarchical carbon-silicon nanowire heterostructures for the hydrogen evolution reaction

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 efficien...

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Published in:Nanoscale 2018-08, Vol.10 (29), p.13936-13941
Main 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
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container_end_page 13941
container_issue 29
container_start_page 13936
container_title Nanoscale
container_volume 10
creator Moon, Joonhee
Sim, Uk
Kim, Dong Jin
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Ha, Heonjin
Choi, Kyoung Soon
Jeon, Cheolho
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Nam, Ki Tae
Hong, Byung Hee
description 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 photocatalytic 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.
doi_str_mv 10.1039/c8nr02262c
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source Royal Society of Chemistry Journals
subjects Carbon
Catalysis
Catalysts
Chemical vapor deposition
Corrosion
Energy conversion
Energy storage
Heterostructures
Hydrogen evolution reactions
Hydrogen production
Hydrogen storage
Morphology
Nanowires
Organic chemistry
Oxidation
Silicon
title Hierarchical carbon-silicon nanowire heterostructures for the hydrogen evolution reaction
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