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Article: Unraveling the Asymmetric O─O Radical Coupling Mechanism on Ru─O─Co for Enhanced Acidic Water Oxidation

TitleUnraveling the Asymmetric O─O Radical Coupling Mechanism on Ru─O─Co for Enhanced Acidic Water Oxidation
Authors
Keywordsacidic oxygen evolution reaction
electrocatalysts
heterogeneous oxides
Issue Date12-Jul-2023
PublisherWiley
Citation
Small, 2023 How to Cite?
Abstract

Heterogeneous oxides with multiple interfaces provide significant advantages in electrocatalytic activity and stability. However, controlling the local structure of these oxides is challenging. In this work, unique heterojunctions are demonstrated based on two oxide types, which are formed via pyrolysis of a ruthenocene metal–organic framework (Ru-MOF) at specific temperatures. The resulted Ru-MOF-400 exhibits excellent electrocatalytic activity, with an overpotential of 190 mV at a current density of 10 mA cm−2 in 0.1 m HClO4, and a mass activity of 2557 A gRu−1, three orders of magnitude higher than commercial RuO2. The Ru─O─Co bond formed by the incorporation of Co into the rutile lattice of RuO2 inhibits the disolution of Ru. Operando electrochemical investigations and density functional theory results reveal that the Ru-MOF-400 undergo asymmetric dual-active site oxide path mechanism during the acidic oxygen evolution reaction process, which is predominantly mediated by the asymmetric Ru─Co dual active site present at the interfaces between Co3O4 and CoRuOx.


Persistent Identifierhttp://hdl.handle.net/10722/331827
ISSN
2023 Impact Factor: 13.0
2023 SCImago Journal Rankings: 3.348
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiang, Jing-
dc.contributor.authorGao, Xutao-
dc.contributor.authorXu, Ke-
dc.contributor.authorLu, Jun-
dc.contributor.authorLiu, Delong-
dc.contributor.authorZhao, Zhiwei-
dc.contributor.authorTse, Edmund C M-
dc.contributor.authorPeng, Zhangquan-
dc.contributor.authorZhang, Wanbin-
dc.contributor.authorLiu, Jinxuan-
dc.date.accessioned2023-09-21T06:59:16Z-
dc.date.available2023-09-21T06:59:16Z-
dc.date.issued2023-07-12-
dc.identifier.citationSmall, 2023-
dc.identifier.issn1613-6810-
dc.identifier.urihttp://hdl.handle.net/10722/331827-
dc.description.abstract<p>Heterogeneous oxides with multiple interfaces provide significant advantages in electrocatalytic activity and stability. However, controlling the local structure of these oxides is challenging. In this work, unique heterojunctions are demonstrated based on two oxide types, which are formed via pyrolysis of a ruthenocene metal–organic framework (Ru-MOF) at specific temperatures. The resulted Ru-MOF-400 exhibits excellent electrocatalytic activity, with an overpotential of 190 mV at a current density of 10 mA cm<sup>−2</sup> in 0.1 m HClO<sub>4</sub>, and a mass activity of 2557 A g<sub>Ru</sub><sup>−1</sup>, three orders of magnitude higher than commercial RuO<sub>2</sub>. The Ru─O─Co bond formed by the incorporation of Co into the rutile lattice of RuO<sub>2</sub> inhibits the disolution of Ru. Operando electrochemical investigations and density functional theory results reveal that the Ru-MOF-400 undergo asymmetric dual-active site oxide path mechanism during the acidic oxygen evolution reaction process, which is predominantly mediated by the asymmetric Ru─Co dual active site present at the interfaces between Co<sub>3</sub>O<sub>4</sub> and CoRuO<em><sub>x</sub></em>.<br></p>-
dc.languageeng-
dc.publisherWiley-
dc.relation.ispartofSmall-
dc.subjectacidic oxygen evolution reaction-
dc.subjectelectrocatalysts-
dc.subjectheterogeneous oxides-
dc.titleUnraveling the Asymmetric O─O Radical Coupling Mechanism on Ru─O─Co for Enhanced Acidic Water Oxidation-
dc.typeArticle-
dc.identifier.doi10.1002/smll.202304889-
dc.identifier.scopuseid_2-s2.0-85164697354-
dc.identifier.eissn1613-6829-
dc.identifier.isiWOS:001026590700001-
dc.identifier.issnl1613-6810-

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