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

Title
Highly efficient hydrogen evolution reaction by strain and phase engineering in composites of Pt and MoS2 nano-scrolls
Author
서동학
Keywords
ENHANCED CATALYTIC-ACTIVITY; LOCAL STRAIN; SOFT ACIDS; TRANSITION; NANOSHEETS; GRAPHENE; NANOPARTICLES; IDENTIFICATION; MONOLAYER; HARD
Issue Date
2017-06
Publisher
ROYAL SOC CHEMISTRY
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v. 19, no. 28, page. 18356-18365
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.
URI
https://pubs.rsc.org/en/content/articlelanding/2017/CP/C7CP03495D#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/114381
ISSN
1463-9076; 1463-9084
DOI
10.1039/c7cp03495d
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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