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Article: Intrinsically Conductive Perovskite Oxides with Enhanced Stability and Electrocatalytic Activity for Oxygen Reduction Reactions

TitleIntrinsically Conductive Perovskite Oxides with Enhanced Stability and Electrocatalytic Activity for Oxygen Reduction Reactions
Authors
Keywordsconductive perovskite
reaction mechanism
transition-metal oxide
oxygen reduction reaction
carbon-free
Issue Date2016
Citation
ACS Catalysis, 2016, v. 6, n. 11, p. 7865-7871 How to Cite?
Abstract© 2016 American Chemical Society.The oxygen reduction reaction (ORR) is traditionally catalyzed by carbon-supported precious metals, heteroatom-doped carbons, and transition-metal-carbon hybrids. Despite their good electric conductivity and high catalytic activities, these carbon-containing catalysts suffer from electrochemical carbon corrosion which limits their utility in metal-air batteries and fuel cells. Here, we report a class of perovskite La0.5Sr0.5Mn1-xNixO3-δ nanocrystals that are intrinsically conductive with good electrocatalytic activity for the ORR. Among these perovskites, La0.5Sr0.5Mn0.9Ni0.1O3-δ (δ = 0.06, LSMN) exhibited the highest electrocatalytic activity for ORR with an onset potential of 1.02 V, a half-wave potential of 0.80 V, and a Tafel slope of -68 mV decade-1 in 0.1 M potassium hydroxide aqueous solution. Negligible degradation of oxygen reduction currents was observed after 300 cyclic voltammetry scans from 1.08 to 0.15 V. We demonstrated that the electrically conductive perovskites with transition-metal redox couples and oxygen vacancies are essential. Our work demonstrates the possibility of carbon-free oxygen electrocatalysis with widely promising applications. (Chemical Equation Presented).
Persistent Identifierhttp://hdl.handle.net/10722/237537
ISSN
2020 Impact Factor: 13.084
2020 SCImago Journal Rankings: 4.898
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGe, Xiaoming-
dc.contributor.authorDu, Yonghua-
dc.contributor.authorLi, Bing-
dc.contributor.authorHor, T. S Andy-
dc.contributor.authorSindoro, Melinda-
dc.contributor.authorZong, Yun-
dc.contributor.authorZhang, Hua-
dc.contributor.authorLiu, Zhaolin-
dc.date.accessioned2017-01-16T06:09:33Z-
dc.date.available2017-01-16T06:09:33Z-
dc.date.issued2016-
dc.identifier.citationACS Catalysis, 2016, v. 6, n. 11, p. 7865-7871-
dc.identifier.issn2155-5435-
dc.identifier.urihttp://hdl.handle.net/10722/237537-
dc.description.abstract© 2016 American Chemical Society.The oxygen reduction reaction (ORR) is traditionally catalyzed by carbon-supported precious metals, heteroatom-doped carbons, and transition-metal-carbon hybrids. Despite their good electric conductivity and high catalytic activities, these carbon-containing catalysts suffer from electrochemical carbon corrosion which limits their utility in metal-air batteries and fuel cells. Here, we report a class of perovskite La0.5Sr0.5Mn1-xNixO3-δ nanocrystals that are intrinsically conductive with good electrocatalytic activity for the ORR. Among these perovskites, La0.5Sr0.5Mn0.9Ni0.1O3-δ (δ = 0.06, LSMN) exhibited the highest electrocatalytic activity for ORR with an onset potential of 1.02 V, a half-wave potential of 0.80 V, and a Tafel slope of -68 mV decade-1 in 0.1 M potassium hydroxide aqueous solution. Negligible degradation of oxygen reduction currents was observed after 300 cyclic voltammetry scans from 1.08 to 0.15 V. We demonstrated that the electrically conductive perovskites with transition-metal redox couples and oxygen vacancies are essential. Our work demonstrates the possibility of carbon-free oxygen electrocatalysis with widely promising applications. (Chemical Equation Presented).-
dc.languageeng-
dc.relation.ispartofACS Catalysis-
dc.subjectconductive perovskite-
dc.subjectreaction mechanism-
dc.subjecttransition-metal oxide-
dc.subjectoxygen reduction reaction-
dc.subjectcarbon-free-
dc.titleIntrinsically Conductive Perovskite Oxides with Enhanced Stability and Electrocatalytic Activity for Oxygen Reduction Reactions-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acscatal.6b02493-
dc.identifier.scopuseid_2-s2.0-84994528992-
dc.identifier.hkuros280160-
dc.identifier.volume6-
dc.identifier.issue11-
dc.identifier.spage7865-
dc.identifier.epage7871-
dc.identifier.isiWOS:000387306100068-
dc.identifier.issnl2155-5435-

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