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|a 10.1002/adma.202103812
|2 doi
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|a pubmed24n1102.xml
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|a (DE-627)NLM330836315
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|a (NLM)34541731
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|a DE-627
|b ger
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|a eng
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|a Abed, Jehad
|e verfasserin
|4 aut
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|a In Situ Formation of Nano Ni-Co Oxyhydroxide Enables Water Oxidation Electrocatalysts Durable at High Current Densities
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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 10.11.2021
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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 The oxygen evolution reaction (OER) limits the energy efficiency of electrocatalytic systems due to the high overpotential symptomatic of poor reaction kinetics; this problem worsens over time if the performance of the OER electrocatalyst diminishes during operation. Here, a novel synthesis of nanocrystalline Ni-Co-Se using ball milling at cryogenic temperature is reported. It is discovered that, by anodizing the Ni-Co-Se structure during OER, Se ions leach out of the original structure, allowing water molecules to hydrate Ni and Co defective sites, and the nanoparticles to evolve into an active Ni-Co oxyhydroxide. This transformation is observed using operando X-ray absorption spectroscopy, with the findings confirmed using density functional theory calculations. The resulting electrocatalyst exhibits an overpotential of 279 mV at 0.5 A cm-2 and 329 mV at 1 A cm-2 and sustained performance for 500 h. This is achieved using low mass loadings (0.36 mg cm-2 ) of cobalt. Incorporating the electrocatalyst in an anion exchange membrane water electrolyzer yields a current density of 1 A cm-2 at 1.75 V for 95 h without decay in performance. When the electrocatalyst is integrated into a CO2 -to-ethylene electrolyzer, a record-setting full cell voltage of 3 V at current density 1 A cm-2 is achieved
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|a Journal Article
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|a CO2 reduction
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|a PGM-free X-ray absorption spectroscopy
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|a cryomilling
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|a oxygen evolution reaction
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|a Ahmadi, Shideh
|e verfasserin
|4 aut
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|a Laverdure, Laura
|e verfasserin
|4 aut
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|a Abdellah, Ahmed
|e verfasserin
|4 aut
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|a O'Brien, Colin P
|e verfasserin
|4 aut
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|a Cole, Kevin
|e verfasserin
|4 aut
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|a Sobrinho, Pedro
|e verfasserin
|4 aut
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|a Sinton, David
|e verfasserin
|4 aut
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|a Higgins, Drew
|e verfasserin
|4 aut
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|a Mosey, Nicholas J
|e verfasserin
|4 aut
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|a Thorpe, Steven J
|e verfasserin
|4 aut
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|a Sargent, Edward H
|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 33(2021), 45 vom: 01. Nov., Seite e2103812
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:45
|g day:01
|g month:11
|g pages:e2103812
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|u http://dx.doi.org/10.1002/adma.202103812
|3 Volltext
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|d 33
|j 2021
|e 45
|b 01
|c 11
|h e2103812
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