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Park, Noejung
Computational Physics & Electronic Structure Lab
Research Interests
  • Electronic structure calculation, computational physics, computational material science

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Covalent 0D-2D Heterostructuring of Co9S8-MoS(2)for Enhanced Hydrogen Evolution in All pH Electrolytes

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dc.contributor.author Kim, Minkyung ko
dc.contributor.author Anjum, Mohsin Ali Raza ko
dc.contributor.author Choi, Min ko
dc.contributor.author Jeong, Hu Young ko
dc.contributor.author Choi, Sun Hee ko
dc.contributor.author Park, Noejung ko
dc.contributor.author Lee, Jae Sung ko
dc.date.available 2020-10-22T08:01:55Z -
dc.date.created 2020-09-03 ko
dc.date.issued 2020-10 ko
dc.identifier.citation ADVANCED FUNCTIONAL MATERIALS, v.30, no.40, pp.2002536 ko
dc.identifier.issn 1616-301X ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/48073 -
dc.description.abstract Ultrasmall Co(9)S(8)nanoparticles are introduced on the basal plane of MoS(2)to fabricate a covalent 0D-2D heterostructure that enhances the hydrogen evolution reaction (HER) activity of electrochemical water splitting. In the heterostructure, separate phases of Co(9)S(8)and MoS(2)are formed, but they are connected by Co-S-Mo type covalent bonds. The charge redistribution from Co to Mo occurring at the interface enhances the electron-doped characteristics of MoS(2)to generate electron-rich Mo atoms. Besides, reductive annealing during the synthesis forms S defects that activates adjacent Mo atoms for further enhanced HER activity as elucidated by the density functional theory (DFT) calculation. Eventually, the covalent Co9S8-MoS(2)heterostructure shows amplified HER activity as well as stability in all pH electrolytes. The synergistic effect is pronounced when the heterostructure is coupled with a porous Ni foam (NF) support to form Co9S8-MoS2/NF that displays superior performance to those of the state-of-the-art non-noble metal electrocatalysts, and even outperforms a commercial Pt/C catalyst in a practically meaningful, high current density region in alkaline (>170 mA cm(-2)) and neutral (>60 mA cm(-2)) media. The high HER performance and stability of Co9S8-MoS(2)heterostructure make it a promising pH universal alternative to expensive Pt-based electrocatalysts for practical water electrolyzers. ko
dc.language 영어 ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.title Covalent 0D-2D Heterostructuring of Co9S8-MoS(2)for Enhanced Hydrogen Evolution in All pH Electrolytes ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85089364878 ko
dc.identifier.wosid 000559498100001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1002/adfm.202002536 ko
dc.identifier.url https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202002536 ko
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