Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202005449
Keywords
2D heterojunctions; atomic‐ scale engineering; coherent heteroepitaxial conversion; hydrogen evolution reaction; metal‐ organic chemical vapor deposition
Categories
Funding
- National Research Foundation (NRF) of Korea [2017R1E1A1A01075283, 2017M3A7B8065377, 2018R1A2A2A05019598, 2019R1A2C3006189, 2020M3D1A1110659]
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant [20174030201430]
- Industrial Core Technology Development Program - Korea Government Ministry of Trade Industry and Energy (MOTIE) [10063579]
- National Research Council of Science & Technology (NST)-Korea Institute of Materials Science (KIMS) Postdoctoral Research Fellowship for Young Scientists at KIMS in South Korea
- KU-KIST school project
- [IBS-R019-D1]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20174030201430] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2020M3D1A1110659, 2017M3A7B8065377, 2017R1E1A1A01075283] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The novel approach proposed in this study aims to design efficient and robust HER catalysts through out-of-plane deformation of 2D heterojunction using metal-organic chemical vapor deposition. By converting high-yield, single-crystalline WTe2 nanobelts to WS2 with lattice coherency, both lateral and vertical junctions in the WTe2/WS2 heterostructure are achieved. The increase in effective surface area and decrease in electron-transfer resistance across the 2D heterojunctions enhance the HER performance and long-term durability of the electrocatalysts.
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available