| Naslov: | Non-covalent ligand-oxide interaction promotes oxygen evolution |
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| Avtorji: | ID Wu, Qianbao (Avtor)
ID Liang, Junwu (Avtor)
ID Xiao, Mengjun (Avtor)
ID Long, Chang (Avtor)
ID Li, Lei (Avtor)
ID Zeng, Zhenhua (Avtor)
ID Mavrič, Andraž (Avtor)
ID Zheng, Xia (Avtor)
ID Zhu, Jing (Avtor)
ID Valant, Matjaž (Avtor), et al. |
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| Datoteke: |  RAZ_Wu_Qianbao_2023.pdf (1,77 MB)
MD5: E4F79C241FB1DD40A54149C271260491
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Neznano |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | UNG - Univerza v Novi Gorici
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| Opis: | Strategies to generate high-valence metal species capable of oxidizing water often employ composition and coordination tuning of oxide-based catalysts, where strong covalent interactions with metal sites are crucial. However, it remains unexplored whether a relatively weak “non-bonding” interaction between ligands and oxides can mediate the electronic states of metal sites in oxides. Here we present an unusual non-covalent phenanthroline-CoO2 interaction that substantially elevates the population of Co4+ sites for improved water oxidation. We find that phenanthroline only coordinates with Co2+ forming soluble Co(phenanthroline)2(OH)2 complex in alkaline electrolytes, which can be deposited as amorphous CoOxHy film containing non-bonding phenanthroline upon oxidation of Co2+ to Co3+/4+. This in situ deposited catalyst demonstrates a low overpotential of 216 mV at 10 mA cm−2 and sustainable activity over 1600 h with Faradaic efficiency above 97%. Density functional theory calculations reveal that the presence of phenanthroline can stabilize CoO2 through the non-covalent interaction and generate polaron-like electronic states at the Co-Co center. |
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| Ključne besede: | water oxidation, cobalt hydroxide, ligand-metal interactions |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Datum objave: | 01.01.2023 |
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| Leto izida: | 2023 |
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| Št. strani: | str. 1-12 |
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| Številčenje: | Vol. 14, article no. 997 |
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| PID: | 20.500.12556/RUNG-7997-ba085eca-51ea-1c45-6b79-1b60410f164f  |
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| COBISS.SI-ID: | 142729475 |
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| UDK: | 54 |
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| ISSN pri članku: | 2041-1723 |
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| DOI: | 10.1038/s41467-023-36718-3 |
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| NUK URN: | URN:SI:UNG:REP:TFCI9DZW |
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| Datum objave v RUNG: | 23.02.2023 |
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| Število ogledov: | 1421 |
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| Število prenosov: | 15 |
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| Metapodatki: |     |
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