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240327s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202401818
|2 doi
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|a pubmed24n1488.xml
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|a (DE-627)NLM370192931
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|a (NLM)38529734
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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 Li, Ang
|e verfasserin
|4 aut
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|a Directed Surface Reconstruction of Fe Modified Co2VO4 Spinel Oxides for Water Oxidation Catalysts Experiencing Self-Terminating Surface Deterioration
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 01.08.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a Affordable highly efficient catalysts for electrochemical oxygen evolution reaction (OER) play pivotal roles in green hydrogen production via water electrolysis. Regarding the non-noble metal-based electrocatalysts, considerable efforts are made to decipher the cation leaching and surface reconstruction; yet, little attention is focused on correlating them with catalytical activity and stability. Herein, in situ reconstruction of Fe-modified Co2VO4 precursor catalyst to form a highly active (Fe,V)-doped CoOOH phase for OER is reported, during which partial leaching of V accelerates the surface reconstruction and the V reserved in the reconstructed CoOOH layer in the form of alkali-resistant V2O3 serves for dynamic charge compensation and prevention of excessive loss of lattice oxygen and Co dissolution. Fe substitution facilitates Co pre-oxidation and endows the catalysts with structural flexibility by elevating O 2p band level; hence, encouraging participation of lattice oxygen in OER. The optimized Co2Fe0.25V0.75O4 electrode can afford current densities of 10 and 500 mA cm-2 at low overpotentials of 205 and 320 mV, respectively, with satisfactory stability over 600 h. By coupling with Pt/C cathode, the assembled alkaline electrolyzer can deliver 500 mA cm-2 at a low cell voltage of 1.798 V, better than that of commercial RuO2 (+) || Pt/C (-)
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|a Journal Article
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|a CV activation
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|a cation leaching
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|a oxygen evolution reaction
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| 650 |
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|a surface reconstruction
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1 |
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|a Tang, Xiaoxia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cao, Runjie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Song, Dongcai
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Fangzheng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yan, Hua
|e verfasserin
|4 aut
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1 |
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|a Chen, Hongmei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wei, Zidong
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 31 vom: 09. Aug., Seite e2401818
|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:31
|g day:09
|g month:08
|g pages:e2401818
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|u http://dx.doi.org/10.1002/adma.202401818
|3 Volltext
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|d 36
|j 2024
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|h e2401818
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