Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138960
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dc.contributor.authorZhou, Yeen_US
dc.contributor.authorSun, Shengnanen_US
dc.contributor.authorSong, Jiajiaen_US
dc.contributor.authorXi, Shiboen_US
dc.contributor.authorChen, Boen_US
dc.contributor.authorDu, Yonghuaen_US
dc.contributor.authorFisher, Adrian C.en_US
dc.contributor.authorCheng, Fangyien_US
dc.contributor.authorWang, Xinen_US
dc.contributor.authorZhang, Huaen_US
dc.contributor.authorXu, Zhichuan Jasonen_US
dc.date.accessioned2020-05-14T05:58:36Z-
dc.date.available2020-05-14T05:58:36Z-
dc.date.issued2018-
dc.identifier.citationZhou, Y., Sun, S., Song, J., Xi, S., Chen, B., Du, Y., . . . Xu, Z. J. (2018). Enlarged Co-O covalency in octahedral sites leading to highly efficient spinel oxides for oxygen evolution reaction. Advanced Materials, 30(32), 1802912-. doi:10.1002/adma.201802912en_US
dc.identifier.issn0935-9648en_US
dc.identifier.urihttps://hdl.handle.net/10356/138960-
dc.description.abstractCobalt-containing spinel oxides are promising electrocatalysts for the oxygen evolution reaction (OER) owing to their remarkable activity and durability. However, the activity still needs further improvement and related fundamentals remain untouched. The fact that spinel oxides tend to form cation deficiencies can differentiate their electrocatalysis from other oxide materials, for example, the most studied oxygen-deficient perovskites. Here, a systematic study of spinel ZnFex Co2-x O4 oxides (x = 0-2.0) toward the OER is presented and a highly active catalyst superior to benchmark IrO2 is developed. The distinctive OER activity is found to be dominated by the metal-oxygen covalency and an enlarged CoO covalency by 10-30 at% Fe substitution is responsible for the activity enhancement. While the pH-dependent OER activity of ZnFe0.4 Co1.6 O4 (the optimal one) indicates decoupled proton-electron transfers during the OER, the involvement of lattice oxygen is not considered as a favorable route because of the downshifted O p-band center relative to Fermi level governed by the spinel's cation deficient nature.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofAdvanced Materialsen_US
dc.rights© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en_US
dc.subjectEngineering::Materialsen_US
dc.titleEnlarged Co-O covalency in octahedral sites leading to highly efficient spinel oxides for oxygen evolution reactionen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.schoolSchool of Materials Science & Engineeringen_US
dc.contributor.schoolInterdisciplinary Graduate School (IGS)en_US
dc.contributor.organizationSolar Fuels Laboratoryen_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.identifier.doi10.1002/adma.201802912-
dc.identifier.pmid29939436-
dc.identifier.scopus2-s2.0-85051104050-
dc.identifier.issue32en_US
dc.identifier.volume30en_US
dc.subject.keywordsCation Deficiencyen_US
dc.subject.keywordsDecoupled Proton–electron Transfersen_US
item.fulltextNo Fulltext-
item.grantfulltextnone-
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