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Kwon, Soon-Yong
Frontier, Innovative Nanomaterials & Devices (FIND) Lab
Research Interests
  • Semiconductor Epitaxy, thin film technology & surface/ interface Science

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Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

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Title
Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation
Author
Sim, YeoseonYoon, AramKang, Hee SeongKwak, JinsungKim, Se‐YangJo, YongsuChoe, DaeseongNa, WoongkiLee, Min HeePark, Soon‐DongSong, SeungukKim, DaeyongYoo, Jung-WooKim, Sung YoubCheong, HyeonsikLee, Jae SungLee, Chul‐HoLee, ZonghoonKwon, Soon-Yong
Issue Date
2020-12
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.2020, no.1, pp.2005449
Abstract
The structural engineering of 2D layered materials is emerging as a powerful strategy to design catalysts for high-performance hydrogen evolution reaction (HER). However, the ultimate test of this technology under typical operating settings lies in the reduced performance and the shortened lifespan of these catalysts. Here, a novel approach is proposed to design efficient and robust HER catalysts through out-of-plane deformation of 2D heterojunction using metal-organic chemical vapor deposition. High-yield, single-crystalline WTe2 nanobelts are used as an epitaxial template for their coherent conversion to WS2. During the conversion process, the WTe2/WS2 heterostructure containing both lateral and vertical junctions are achieved by coherent heteroepitaxial stacking despite differences in symmetry. The lattice coherency drives out-of-plane deformation of heteroepitaxially grown WS2. The increase in the effective surface area and decrease in the electron-transfer resistance across the 2D heterojunctions in turn enhances the HER performance as well as the long-term durability of these electrocatalysts.
URI
https://scholarworks.unist.ac.kr/handle/201301/49008
URL
https://onlinelibrary.wiley.com/doi/10.1002/adfm.202005449
DOI
10.1002/adfm.202005449
ISSN
1616-301X
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