Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation
- Authors
- Sim, Yeoseon; Yoon, Aram; Kang, Hee Seong; Kwak, Jinsung; Kim, Se-Yang; Jo, Yongsu; Choe, Daeseong; Na, Woongki; Lee, Min Hee; Park, Soon-Dong; Song, Seunguk; Kim, Daeyong; Yoo, Jung-Woo; Kim, Sung Youb; Cheong, Hyeonsik; Lee, Jae Sung; Lee, Chul-Ho; Lee, Zonghoon; Kwon, Soon-Yong
- Issue Date
- 2월-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- 2D heterojunctions; atomic& #8208; coherent heteroepitaxial conversion; hydrogen evolution reaction; metal& #8208; organic chemical vapor deposition; scale engineering
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.31, no.9
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 31
- Number
- 9
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/137792
- DOI
- 10.1002/adfm.202005449
- ISSN
- 1616-301X
- 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.
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