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Article: Co@Co3O4@PPD Core@bishell Nanoparticle-Based Composite as an Efficient Electrocatalyst for Oxygen Reduction Reaction

TitleCo@Co3O4@PPD Core@bishell Nanoparticle-Based Composite as an Efficient Electrocatalyst for Oxygen Reduction Reaction
Authors
Keywordsdopamine
cobalt oxide
zinc-air batteries
oxygen reduction reaction
nitrogen-doped carbon
Issue Date2016
Citation
Small, 2016, v. 12, n. 19, p. 2580-2587 How to Cite?
Abstract© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Durable electrocatalysts with high catalytic activity toward oxygen reduction reaction (ORR) are crucial to high-performance primary zinc-air batteries (ZnABs) and direct methanol fuel cells (DMFCs). An efficient composite electrocatalyst, Co@Co3O4 core@shell nanoparticles (NPs) embedded in pyrolyzed polydopamine (PPD) is reported, i.e., in Co@Co3O4@PPD core@bishell structure, obtained via a three-step sequential process involving hydrothermal synthesis, high temperature calcination under nitrogen atmosphere, and gentle heating in air. With Co@Co3O4 NPs encapsulated by ultrathin highly graphitized N-doped carbon, the catalyst exhibits excellent stability in aqueous alkaline solution over extended period and good tolerance to methanol crossover effect. The integration of N-doped graphitic carbon outer shell and ultrathin nanocrystalline Co3O4 inner shell enable high ORR activity of the core@bishell NPs, as evidenced by ZnABs using catalyst of Co@Co3O4@PPD in air-cathode which delivers a stable voltage profile over 40 h at a discharge current density of as high as 20 mA cm-2. Co@Co3O4 core@shell nanoparticles (NPs) embedded in N-doped graphitic carbon matrix of pyrolyzed polydopamine (PPD), i.e., Co@Co3O4@PPD core@bishell structure are obtained. This material shows high oxygen reduction reaction activity. Consequently, it is used as a cathode catalyst in zinc-air batteries and delivers stable voltage profile over an extended period at a discharge current density of as high as 20 mA cm-2.
Persistent Identifierhttp://hdl.handle.net/10722/237526
ISSN
2020 Impact Factor: 13.281
2020 SCImago Journal Rankings: 3.785
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Zhijuan-
dc.contributor.authorLi, Bing-
dc.contributor.authorGe, Xiaoming-
dc.contributor.authorGoh, F. W Thomas-
dc.contributor.authorZhang, Xiao-
dc.contributor.authorDu, Guojun-
dc.contributor.authorWuu, Delvin-
dc.contributor.authorLiu, Zhaolin-
dc.contributor.authorAndy Hor, T. S.-
dc.contributor.authorZhang, Hua-
dc.contributor.authorZong, Yun-
dc.date.accessioned2017-01-16T06:09:27Z-
dc.date.available2017-01-16T06:09:27Z-
dc.date.issued2016-
dc.identifier.citationSmall, 2016, v. 12, n. 19, p. 2580-2587-
dc.identifier.issn1613-6810-
dc.identifier.urihttp://hdl.handle.net/10722/237526-
dc.description.abstract© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Durable electrocatalysts with high catalytic activity toward oxygen reduction reaction (ORR) are crucial to high-performance primary zinc-air batteries (ZnABs) and direct methanol fuel cells (DMFCs). An efficient composite electrocatalyst, Co@Co3O4 core@shell nanoparticles (NPs) embedded in pyrolyzed polydopamine (PPD) is reported, i.e., in Co@Co3O4@PPD core@bishell structure, obtained via a three-step sequential process involving hydrothermal synthesis, high temperature calcination under nitrogen atmosphere, and gentle heating in air. With Co@Co3O4 NPs encapsulated by ultrathin highly graphitized N-doped carbon, the catalyst exhibits excellent stability in aqueous alkaline solution over extended period and good tolerance to methanol crossover effect. The integration of N-doped graphitic carbon outer shell and ultrathin nanocrystalline Co3O4 inner shell enable high ORR activity of the core@bishell NPs, as evidenced by ZnABs using catalyst of Co@Co3O4@PPD in air-cathode which delivers a stable voltage profile over 40 h at a discharge current density of as high as 20 mA cm-2. Co@Co3O4 core@shell nanoparticles (NPs) embedded in N-doped graphitic carbon matrix of pyrolyzed polydopamine (PPD), i.e., Co@Co3O4@PPD core@bishell structure are obtained. This material shows high oxygen reduction reaction activity. Consequently, it is used as a cathode catalyst in zinc-air batteries and delivers stable voltage profile over an extended period at a discharge current density of as high as 20 mA cm-2.-
dc.languageeng-
dc.relation.ispartofSmall-
dc.subjectdopamine-
dc.subjectcobalt oxide-
dc.subjectzinc-air batteries-
dc.subjectoxygen reduction reaction-
dc.subjectnitrogen-doped carbon-
dc.titleCo@Co3O4@PPD Core@bishell Nanoparticle-Based Composite as an Efficient Electrocatalyst for Oxygen Reduction Reaction-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/smll.201503694-
dc.identifier.scopuseid_2-s2.0-84963604272-
dc.identifier.hkuros285670-
dc.identifier.volume12-
dc.identifier.issue19-
dc.identifier.spage2580-
dc.identifier.epage2587-
dc.identifier.eissn1613-6829-
dc.identifier.isiWOS:000378424100007-
dc.identifier.issnl1613-6810-

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