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Active hydrogen evolution through lattice distortion in metallic MoTe2

Title
Active hydrogen evolution through lattice distortion in metallic MoTe2
Authors
Seok J.Lee J.-H.Cho S.Ji B.Kim H.W.Kwon M.Kim D.Kim Y.-M.Oh S.H.Kim S.W.Lee Y.H.Son Y.-W.Yang H.
Ewha Authors
조수연
SCOPUS Author ID
조수연scopus
Issue Date
2017
Journal Title
2D Materials
ISSN
2053-1583JCR Link
Citation
vol. 4, no. 2
Keywords
Hydrogen evolution reactionPeierls-type lattice distortionScanning tunneling microscopySurface charge density waveTransition metal dichalcogenides
Publisher
IOP Publishing Ltd
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Engineering surface atoms of transition metal dichalcogenides (TMDs) is a promising way to design catalysts for efficient electrochemical reactions including the hydrogen evolution reaction (HER). However, materials processing based on TMDs, such as vacancy creation or edge exposure, for active HER, has resulted in insufficient atomic-precision lattice homogeneity and a lack of clear understanding of HER over 2D materials. Here, we report a durable and effective HER at atomically defined reaction sites in 2D layered semimetallic MoTe2 with intrinsic turnover frequency (TOF) of 0.14 s-1 at 0 mV overpotential, which cannot be explained by the traditional volcano plot analysis. Unlike former electrochemical catalysts, the rate-determining step of the HER on the semimetallic MoTe2, hydrogen adsorption, drives Peierls-type lattice distortion that, together with a surface charge density wave, unexpectedly enhances the HER. The active HER using unique 2D features of layered TMDs enables an optimal design of electrochemical catalysts and paves the way for a hydrogen economy. © 2017 IOP Publishing Ltd.
DOI
10.1088/2053-1583/aa659d
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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