Crystal Phase Transition Creates a Highly Active and Stable RuCX Nanosurface for Hydrogen Evolution Reaction in Alkaline Media

© 2021 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 48 vom: 25. Dez., Seite e2105248
1. Verfasser: Kim, Jeonghyeon (VerfasserIn)
Weitere Verfasser: Kim, Hee Jin, Ruqia, Bibi, Kim, Mi Ji, Jang, Yeong-Ji, Jo, Tae Hwan, Baik, Hionsuck, Oh, Hyung-Suk, Chung, Hee-Suk, Baek, Kangkyun, Noh, Siwoo, Jung, Moonjung, Kim, Ki-Jeong, Lim, Hyung-Kyu, Youn, Young-Sang, Choi, Sang-Il
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article alkaline media hydrogen evolution reaction nanosurfaces phase transitions ruthenium carbide
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520 |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 
650 4 |a Journal Article 
650 4 |a alkaline media 
650 4 |a hydrogen evolution reaction 
650 4 |a nanosurfaces 
650 4 |a phase transitions 
650 4 |a ruthenium carbide 
700 1 |a Kim, Hee Jin  |e verfasserin  |4 aut 
700 1 |a Ruqia, Bibi  |e verfasserin  |4 aut 
700 1 |a Kim, Mi Ji  |e verfasserin  |4 aut 
700 1 |a Jang, Yeong-Ji  |e verfasserin  |4 aut 
700 1 |a Jo, Tae Hwan  |e verfasserin  |4 aut 
700 1 |a Baik, Hionsuck  |e verfasserin  |4 aut 
700 1 |a Oh, Hyung-Suk  |e verfasserin  |4 aut 
700 1 |a Chung, Hee-Suk  |e verfasserin  |4 aut 
700 1 |a Baek, Kangkyun  |e verfasserin  |4 aut 
700 1 |a Noh, Siwoo  |e verfasserin  |4 aut 
700 1 |a Jung, Moonjung  |e verfasserin  |4 aut 
700 1 |a Kim, Ki-Jeong  |e verfasserin  |4 aut 
700 1 |a Lim, Hyung-Kyu  |e verfasserin  |4 aut 
700 1 |a Youn, Young-Sang  |e verfasserin  |4 aut 
700 1 |a Choi, Sang-Il  |e verfasserin  |4 aut 
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773 1 8 |g volume:33  |g year:2021  |g number:48  |g day:25  |g month:12  |g pages:e2105248 
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