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231227s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202311102
|2 doi
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|a pubmed24n1353.xml
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|a (DE-627)NLM365913669
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|a (NLM)38100677
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Weng, Zheng
|e verfasserin
|4 aut
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|a Significance of Engineering the MnO6 Octahedral Units to Promote the Oxygen Reduction Reaction of Perovskite Oxides
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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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|2 rdacarrier
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|a Date Revised 28.03.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley‐VCH GmbH.
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|a The electronic structure and geometric configuration of catalysts play a crucial role to design novel perovskite-type catalysts for oxygen reduction reaction (ORR). Nowadays, many studies are more concerned with the influence of electronic structure and ignore the geometric effect, which plays a nonnegligible role in enhancing catalytic performances. Herein, this work regulates the MnO6 octahedral tilting degree of LaMnO3 by modulating the concentration of Y3+, excluding the electronic effect from the valence state of manganese. Plotting the MnO6 octahedral tilting degree as a function of concentration of Y3+ produces a volcano-shaped plot. The octahedral tilting can reduce the Mn-O covalency, generating more highly active Mn3+ and oxygen vacancies during ORR process. The specific activity has a positive correlation with octahedral tilting degree. Meanwhile, the octahedral tilting stabilizes Mn-O interactions during ORR process and promote stability. Based on experimental results and DFT calculations, octahedral tilting alters the rate-determining step (RDS) and decrease the energy barrier. Subsequent extended experiment confirms that octahedral tilting is the key factor to affect the catalytic performances
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|a Journal Article
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|a geometric configuration
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|a oxygen reduction reaction
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|a perovskite oxide
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|a rare earth
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|a Liu, Luohua
|e verfasserin
|4 aut
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|a Hu, Yang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wei, Yicheng
|e verfasserin
|4 aut
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1 |
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|a Da, Pengfei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wu, Zelong
|e verfasserin
|4 aut
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1 |
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|a Mu, Zhaori
|e verfasserin
|4 aut
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1 |
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|a Xi, Pinxian
|e verfasserin
|4 aut
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| 700 |
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|a Yan, Chun-Hua
|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), 13 vom: 25. März, Seite e2311102
|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:13
|g day:25
|g month:03
|g pages:e2311102
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|u http://dx.doi.org/10.1002/adma.202311102
|3 Volltext
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