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Issue 28, 2017
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Highly efficient hydrogen evolution reaction by strain and phase engineering in composites of Pt and MoS2 nano-scrolls

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Abstract

The phase transition through local strain engineering is an exciting avenue for controlling electronic, magnetic properties and catalyst activity of materials but complex phenomenon in nanoscience. Herein, we demonstrate the first combinations of bending strain and 2H/1T phase transition by rolling up MoS2 sheets for improving catalytic activity in relatively inert basal plane surfaces and promoting electron transfer from the less-conducting 2H MoS2 sheets to the electrodes. Furthermore, we generate various MoS2@Pt nanoparticle hybrids nanomaterials and especially MoS2@Pt scrolls containing the coverage of Pt NPs (8.3 wt%) have a high catalytic activity (39 mV per decade). The rolled up MoS2@Pt sheets with bending strain (2.4%) provide an intra-layer plane gliding that allows the transversal displacement of an S plane from the 2H to the 1T phases (28%). This unique combination also allows us to maximize the intrinsic HER activity among molybdenum-sulfide based catalysts.

Graphical abstract: Highly efficient hydrogen evolution reaction by strain and phase engineering in composites of Pt and MoS2 nano-scrolls

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Publication details

The article was received on 24 May 2017, accepted on 23 Jun 2017 and first published on 26 Jun 2017


Article type: Paper
DOI: 10.1039/C7CP03495D
Citation: Phys. Chem. Chem. Phys., 2017,19, 18356-18365
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    Highly efficient hydrogen evolution reaction by strain and phase engineering in composites of Pt and MoS2 nano-scrolls

    D. Y. Hwang, K. H. Choi, J. E. Park and D. H. Suh, Phys. Chem. Chem. Phys., 2017, 19, 18356
    DOI: 10.1039/C7CP03495D

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