Spontaneous Formation of 1D Pattern in Monolayer VSe2 with Dispersive Adsorption of Pt Atoms for HER Catalysis
- University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China)
- University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China); Vanderbilt Univ., Nashville, TN (United States)
- University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China); CAS Center for Excellence in Topological Quantum Computation, Beijing (China)
- University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China); Beijing Institute of Technology (China); CAS Center for Excellence in Topological Quantum Computation, Beijing (China)
- Vanderbilt Univ., Nashville, TN (United States); University of Chinese Academy of Sciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China)
Creation of functional patterns in two-dimensional (2D) materials provides opportunities to extend their potential for applications. Transition-metal dichalcogenides (TMDCs) are suitable 2D materials for pattern generation because of properties including alterable polymorphic phases, easy chalcogen-vacancy formation, metal-atom insertion, and alloying. Such patterning can be used for selective functionalization. Here we report the spontaneous formation of long-range, well-ordered 1D patterns in monolayer vanadium diselenide (VSe2) by a single annealing stage during growth. Atomic-resolution images in real space combined with density-functional-theory (DFT) calculations reveal the 1D features of patterned VSe2. Further experimental characterization of the intermediate states in the growth process confirm the spontaneous formation of the 1D pattern by annealing-induced Se-deficient linear defects. The 1D pattern can be reversibly transformed to homogenous VSe2 monolayer by reintroducing Se atoms. Moreover, additional experiments demonstrate that a dispersive deposition of Pt atoms along the 1D structures of patterned VSe2 is achieved, while DFT calculations find that their catalytic activity for hydrogen evolution reaction (HER) is as good as that of Pt surfaces. Further, the formation of long-range, well-ordered 1D patterns not only demonstrates an effective way of dimension modulation in 2D materials but also enriches the potential of intrinsically patterned 2D materials for promising catalytic activities.
- Research Organization:
- Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Key Research & Development Projects of China; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS)
- DOE Contract Number:
- FG02-09ER46554; XDB30000000; XDB28000000
- OSTI ID:
- 1597929
- Journal Information:
- Nano Letters, Vol. 19, Issue 8; ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
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