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나노 구조 물리 연구단
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Active hydrogen evolution through lattice distortion in metallic MoTe2

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Title
Active hydrogen evolution through lattice distortion in metallic MoTe2
Author(s)
Jinbong Seok; Jun-Ho Lee; Suyeon Cho; Byungdo Ji; Hyo Won Kim; Min Kwon; Dohyun Kim; Young-Min Kim; Sang Ho Oh; Sung Wng Kim; Young Hee Lee; Young-Woo Son; Heejun Yang
Publication Date
2017-06
Journal
2D MATERIALS, v.4, no.2, pp.025061-1 - 025061-8
Publisher
IOP PUBLISHING LTD
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
URI
https://pr.ibs.re.kr/handle/8788114/3419
ISSN
2053-1583
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Active Hydrogen_2D Materials_Heejun Yang.pdfDownload

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