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240613s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202402156
|2 doi
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|a pubmed24n1502.xml
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|a (DE-627)NLM373572700
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|a (NLM)38869191
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|a DE-627
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|a eng
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|a Wang, Yuan
|e verfasserin
|4 aut
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|a Stacking Fault-Enriched MoNi4/MoO2 Enables High-Performance Hydrogen Evolution
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|c 2024
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|a Text
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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 15.08.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
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|a Producing green hydrogen in a cost-competitive manner via water electrolysis will make the long-held dream of hydrogen economy a reality. Although platinum (Pt)-based catalysts show good performance toward hydrogen evolution reaction (HER), the high cost and scarce abundance challenge their economic viability and sustainability. Here, a non-Pt, high-performance electrocatalyst for HER achieved by engineering high fractions of stacking fault (SF) defects for MoNi4/MoO2 nanosheets (d-MoNi) through a combined chemical and thermal reduction strategy is shown. The d-MoNi catalyst offers ultralow overpotentials of 78 and 121 mV for HER at current densities of 500 and 1000 mA cm-2 in 1 M KOH, respectively. The defect-rich d-MoNi exhibits four times higher turnover frequency than the benchmark 20% Pt/C, together with its excellent durability (> 100 h), making it one of the best-performing non-Pt catalysts for HER. The experimental and theoretical results reveal that the abundant SFs in d-MoNi induce a compressive strain, decreasing the proton adsorption energy and promoting the associated combination of *H into hydrogen and molecular hydrogen desorption, enhancing the HER performance. This work provides a new synthetic route to engineer defective metal and metal alloy electrocatalysts for emerging electrochemical energy conversion and storage applications
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|a Journal Article
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|a MoNi alloy
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4 |
|a defect
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|a high current density
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|a hydrogen evolution reaction
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|a stacking fault
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|a Arandiyan, Hamidreza
|e verfasserin
|4 aut
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|a Mofarah, Sajjad S
|e verfasserin
|4 aut
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|a Shen, Xiangjian
|e verfasserin
|4 aut
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|a Bartlett, Stuart A
|e verfasserin
|4 aut
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|a Koshy, Pramod
|e verfasserin
|4 aut
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1 |
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|a Sorrell, Charles C
|e verfasserin
|4 aut
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|a Sun, Hongyu
|e verfasserin
|4 aut
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|a Pozo-Gonzalo, Cristina
|e verfasserin
|4 aut
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|a Dastafkan, Kamran
|e verfasserin
|4 aut
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|a Britto, Sylvia
|e verfasserin
|4 aut
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|a Bhargava, Suresh K
|e verfasserin
|4 aut
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|a Zhao, Chuan
|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), 33 vom: 01. Aug., Seite e2402156
|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:33
|g day:01
|g month:08
|g pages:e2402156
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|u http://dx.doi.org/10.1002/adma.202402156
|3 Volltext
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