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Title: Tunable active edge sites in PtSe2 films towards hydrogen evolution reaction
Authors: Lin, S 
Liu, Y 
Hu, Z
Lu, W 
Mak, CH 
Zeng, L 
Zhao, J 
Li, Y 
Yan, F 
Tsang, YH 
Zhang, X 
Lau, SP 
Issue Date: Dec-2017
Source: Nano energy, Dec. 2017, v. 42, p. 26-33
Abstract: Layered transition-metal dichalcogenides (TMDCs) have received great interest due to their potential applications in many fields including electronics, optoelectronics, electrochemical hydrogen production and so on. Recent research effort on the development of effective hydrogen evolution reaction (HER) is to modulate the active edge sites through controlling surface structure at the atomic scale. Here we firstly demonstrate a facile strategy to synthesize large-area and edge-rich platinum diselenide (PtSe2) via selenization of Pt films by magnetron sputtering physical deposition method. The edge site density of the PtSe2 can be effectively controlled by tuning the thickness of Pt films. The HER activity of the PtSe2 can be enhanced significantly as the active edge site density increases. The maximum cathodic current density of 227 mA/cm2 can be obtained through increasing the edge density, which well agrees with the density functional theory calculations. Our work provides a fundamental insight on the effect of active edge site density towards HER.
Keywords: Active sites
Hydrogen evolution reaction
Layered materials
Publisher: Elsevier
Journal: Nano energy 
ISSN: 2211-2855
EISSN: 2211-3282
DOI: 10.1016/j.nanoen.2017.10.038
Rights: © 2017 Elsevier Ltd. All rights reserved.
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
The following publication Lin, S., Liu, Y., Hu, Z., Lu, W., Mak, C. H., Zeng, L., ... & Lau, S. P. (2017). Tunable active edge sites in PtSe2 films towards hydrogen evolution reaction. Nano Energy, 42, 26-33 is available at
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