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|a 10.1002/adma.202412541
|2 doi
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|a pubmed24n1612.xml
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|a (DE-627)NLM378371134
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|a (NLM)39350447
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|a eng
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|a Qin, Zhuhuang
|e verfasserin
|4 aut
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|a Topologically Close-Packed Frank-Kasper C15 Phase Intermetallic Ir Alloy Electrocatalysts Enables High-Performance Proton Exchange Membrane Water Electrolyzer
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|c 2024
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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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|a Date Revised 25.11.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a Chemical synthesis of unconventional topologically close-packed intermetallic nanocrystals (NCs) remains a considerable challenge due to the limitation of large volume asymmetry between the components. Here, a series of unconventional intermetallic Frank-Kasper C15 phase Ir2M (M = rare earth metals La, Ce, Gd, Tb, Tm) NCs is successfully prepared via a molten-salt assisted reduction method as efficient electrocatalysts for hydrogen evolution reaction (HER). Compared to the disordered counterpart (A1-Ir2Ce), C15-Ir2Ce features higher Ir-Ce coordination number that leads to an electron-rich environment for Ir sites. The C15-Ir2Ce catalyst exhibits excellent and pH-universal HER activity and requires only 9, 16, and 27 mV overpotentials to attain 10 mA cm-2 in acidic, alkaline, and neutral electrolytes, respectively, representing one of the best HER electrocatalysts ever reported. In a proton exchange membrane water electrolyzer, the C15-Ir2Ce cathode achieves an industrial-scale current density of 1 A cm-2 with a remarkably low cell voltage of 1.7 V at 80 °C and can operate stably for 1000 h with a sluggish voltage decay rate of 50 µV h-1. Theoretical investigations reveal that the electron-rich Ir sites intensify the polarization of *H2O intermediate on C15-Ir2Ce, thus lowering the energy barrier of the water dissociation and facilitating the HER kinetics
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|a Journal Article
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|a Frank‐Kasper C15 phases
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|a electrocatalysis
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|a hydrogen evolution reaction
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|a intermetallics
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|a proton exchange membrane water electrolyzer
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|a Li, Jinhui
|e verfasserin
|4 aut
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|a Wu, Qiyan
|e verfasserin
|4 aut
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|a Sathishkumar, Nadaraj
|e verfasserin
|4 aut
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|a Liu, Xuan
|e verfasserin
|4 aut
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|a Lai, Jiaoyang
|e verfasserin
|4 aut
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|a Mao, Jialun
|e verfasserin
|4 aut
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|a Xie, Linfeng
|e verfasserin
|4 aut
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|a Li, Shenzhou
|e verfasserin
|4 aut
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|a Lu, Gang
|e verfasserin
|4 aut
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|a Cao, Rui
|e verfasserin
|4 aut
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|a Yan, Pengfei
|e verfasserin
|4 aut
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|a Huang, Yunhui
|e verfasserin
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| 700 |
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|a Li, Qing
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 47 vom: 25. Nov., Seite e2412541
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:36
|g year:2024
|g number:47
|g day:25
|g month:11
|g pages:e2412541
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|u http://dx.doi.org/10.1002/adma.202412541
|3 Volltext
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