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|a 10.1002/adma.202403958
|2 doi
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|a pubmed24n1460.xml
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|a (DE-627)NLM371303001
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|a (NLM)38641326
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|a DE-627
|b ger
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|a eng
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|a Qi, Shuai
|e verfasserin
|4 aut
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|a Ultrathin High-Entropy Fe-Based Spinel Oxide Nanosheets with Metalloid Band Structures for Efficient Nitrate Reduction toward Ammonia
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|c 2024
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|a Text
|b txt
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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 04.07.2024
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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 Spinel oxides with tunable chemical compositions have emerged as versatile electrocatalysts, however their performance is greatly limited by small surface area and low electron conductivity. Here, ultrathin high-entropy Fe-based spinel oxides nanosheets are rationally designed (i.e., (Co0.2Ni0.2Zn0.2Mg0.2Cu0.2)Fe2O4; denotes A5Fe2O4) in thickness of ≈4.3 nm with large surface area and highly exposed active sites via a modified sol-gel method. Theoretic and experimental results confirm that the bandgap of A5Fe2O4 nanosheets is significantly smaller than that of ordinary Fe-based spinel oxides, realizing the transformation of binary spinel oxide from semiconductors to metalloids. As a result, such A5Fe2O4 nanosheets manifest excellent performance for the nitrate reduction reaction (NO3 -RR) to ammonia (NH3), with a NH3 yield rate of ≈2.1 mmol h-1 cm-2 at -0.5 V versus Reversible hydrogen electrode, outperforming other spinel-based electrocatalysts. Systematic mechanism investigations reveal that the NO3 -RR is mainly occurred on Fe sites, and introducing high-entropy compositions in tetrahedral sites regulates the adsorption strength of N and O-related intermediates on Fe for boosting the NO3 -RR. The above findings offer a high-entropy platform to regulate the bandgap and enhance the electrocatalytic performance of spinel oxides
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|a Journal Article
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|a bandgap
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|a electron conductivity
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|a high‐entropy nanomaterials
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|a nitrate reduction reaction
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|a spinel oxides‐based electrocatalysts
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|a Lei, Zhihao
|e verfasserin
|4 aut
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|a Huo, Qihua
|e verfasserin
|4 aut
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|a Zhao, Jinwen
|e verfasserin
|4 aut
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|a Huang, Tianchi
|e verfasserin
|4 aut
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|a Meng, Na
|e verfasserin
|4 aut
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|a Liao, Jinlian
|e verfasserin
|4 aut
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|a Yi, Jiabao
|e verfasserin
|4 aut
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|a Shang, Chunyan
|e verfasserin
|4 aut
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|a Zhang, Xue
|e verfasserin
|4 aut
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|a Yang, Hengpan
|e verfasserin
|4 aut
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1 |
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|a Hu, Qi
|e verfasserin
|4 aut
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|a He, Chuanxin
|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), 27 vom: 17. Juli, Seite e2403958
|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:27
|g day:17
|g month:07
|g pages:e2403958
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|u http://dx.doi.org/10.1002/adma.202403958
|3 Volltext
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|a AR
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|d 36
|j 2024
|e 27
|b 17
|c 07
|h e2403958
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