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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202105248
|2 doi
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|a pubmed24n1105.xml
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|a (DE-627)NLM331531402
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|a (NLM)34611943
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Kim, Jeonghyeon
|e verfasserin
|4 aut
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|a Crystal Phase Transition Creates a Highly Active and Stable RuCX Nanosurface for Hydrogen Evolution Reaction in Alkaline Media
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 01.12.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Although metastable crystal structures have received much attention owing to their utilization in various fields, their phase-transition to a thermodynamic structure has attracted comparably little interest. In the case of nanoscale crystals, such an exothermic phase-transition releases high energy within a confined surface area and reconstructs surface atomic arrangement in a short time. Thus, this high-energy nanosurface may create novel crystal structures when some elements are supplied. In this work, the creation of a ruthenium carbide (RuCX , X < 1) phase on the surface of the Ru nanocrystal is discovered during phase-transition from cubic-close-packed to hexagonal-close-packed structure. When the electrocatalytic hydrogen evolution reaction (HER) is tested in alkaline media, the RuCX exhibits a much lower overpotential and good stability relative to the counterpart Ru-based catalysts and the state-of-the-art Pt/C catalyst. Density functional theory calculations predict that the local heterogeneity of the outermost RuCX surface promotes the bifunctional HER mechanism by providing catalytic sites for both H adsorption and facile water dissociation
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|a Journal Article
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|a alkaline media
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|a hydrogen evolution reaction
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|a nanosurfaces
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|a phase transitions
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|a ruthenium carbide
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|a Kim, Hee Jin
|e verfasserin
|4 aut
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|a Ruqia, Bibi
|e verfasserin
|4 aut
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|a Kim, Mi Ji
|e verfasserin
|4 aut
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|a Jang, Yeong-Ji
|e verfasserin
|4 aut
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|a Jo, Tae Hwan
|e verfasserin
|4 aut
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|a Baik, Hionsuck
|e verfasserin
|4 aut
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|a Oh, Hyung-Suk
|e verfasserin
|4 aut
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|a Chung, Hee-Suk
|e verfasserin
|4 aut
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|a Baek, Kangkyun
|e verfasserin
|4 aut
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|a Noh, Siwoo
|e verfasserin
|4 aut
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|a Jung, Moonjung
|e verfasserin
|4 aut
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|a Kim, Ki-Jeong
|e verfasserin
|4 aut
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|a Lim, Hyung-Kyu
|e verfasserin
|4 aut
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|a Youn, Young-Sang
|e verfasserin
|4 aut
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|a Choi, Sang-Il
|e verfasserin
|4 aut
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 48 vom: 25. Dez., Seite e2105248
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:33
|g year:2021
|g number:48
|g day:25
|g month:12
|g pages:e2105248
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|u http://dx.doi.org/10.1002/adma.202105248
|3 Volltext
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|d 33
|j 2021
|e 48
|b 25
|c 12
|h e2105248
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