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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202110103
|2 doi
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|a pubmed24n1130.xml
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|a (DE-627)NLM339138548
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|a (NLM)35384087
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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 Rong, Chengli
|e verfasserin
|4 aut
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|a Electronic Structure Engineering of Single-Atom Ru Sites via Co-N4 Sites for Bifunctional pH-Universal Water Splitting
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|c 2022
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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 26.05.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.
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|a The development of bifunctional water-splitting electrocatalysts that are efficient and stable over a wide range of pH is of great significance but challenging. Here, an atomically dispersed Ru/Co dual-sites catalyst is reported anchored on N-doped carbon (Ru/Co-N-C) for outstanding oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes. The Ru/Co-N-C catalyst requires the overpotential of only 13 and 23 mV for HER, 232 and 247 mV for OER to deliver a current density of 10 mA cmgeo -2 in 0.5 m H2 SO4 and 1 m KOH, respectively, outperforming benchmark catalysts Pt/C and RuO2 . Theoretical calculations reveal that the introduction of Co-N4 sites into Ru/Co-N-C efficiently modify the electronic structure of Ru by enlarging Ru-O covalency and increasing Ru electron density, which in turn optimize the bonding strength between oxygen/hydrogen intermediate species with Ru sites, thereby enhancing OER and HER performance. Furthermore, the incorporation of Co-N4 sites induces electron redistribution around Ru-N4, thus enhancing corrosion-resistance of Ru/Co-N-C during acid and alkaline electrolysis. The Ru/Co-N-C has been applied in a proton exchange membrane water electrolyzer and steady operation is demonstrated at a high current density of 450 mA cmgeo -2 for 330 h
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|a Journal Article
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|a electrochemical energy conversion
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|a hydrogen
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|a ruthenium cobalt
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|a single-atom catalysts
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4 |
|a water splitting
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1 |
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|a Shen, Xiangjian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Yuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Thomsen, Lars
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Tingwen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Yibing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lu, Xunyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Amal, Rose
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Chuan
|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 34(2022), 21 vom: 19. Mai, Seite e2110103
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
1 |
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|g volume:34
|g year:2022
|g number:21
|g day:19
|g month:05
|g pages:e2110103
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|u http://dx.doi.org/10.1002/adma.202110103
|3 Volltext
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|d 34
|j 2022
|e 21
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|c 05
|h e2110103
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