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Article: Dual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution

TitleDual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution
Authors
Keywordsspinel
covalent coupling
metal-air battery
nanocarbon
oxygen evolution reaction
oxygen reduction reaction
transition-metal oxide
Issue Date2014
Citation
ACS Applied Materials and Interfaces, 2014, v. 6, n. 15, p. 12684-12691 How to Cite?
AbstractOxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo 2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo 2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. © 2014 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/219758
ISSN
2015 Impact Factor: 7.145
2015 SCImago Journal Rankings: 2.381

 

DC FieldValueLanguage
dc.contributor.authorGe, Xiaoming-
dc.contributor.authorLiu, Yayuan-
dc.contributor.authorGoh, F. W Thomas-
dc.contributor.authorHor, T. S Andy-
dc.contributor.authorZong, Yun-
dc.contributor.authorXiao, Peng-
dc.contributor.authorZhang, Zheng-
dc.contributor.authorLim, Suo Hon-
dc.contributor.authorLi, Bing-
dc.contributor.authorWang, Xin-
dc.contributor.authorLiu, Zhaolin-
dc.date.accessioned2015-09-23T02:57:53Z-
dc.date.available2015-09-23T02:57:53Z-
dc.date.issued2014-
dc.identifier.citationACS Applied Materials and Interfaces, 2014, v. 6, n. 15, p. 12684-12691-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10722/219758-
dc.description.abstractOxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo 2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo 2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. © 2014 American Chemical Society.-
dc.languageeng-
dc.relation.ispartofACS Applied Materials and Interfaces-
dc.subjectspinel-
dc.subjectcovalent coupling-
dc.subjectmetal-air battery-
dc.subjectnanocarbon-
dc.subjectoxygen evolution reaction-
dc.subjectoxygen reduction reaction-
dc.subjecttransition-metal oxide-
dc.titleDual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1021/am502675c-
dc.identifier.scopuseid_2-s2.0-84906269282-
dc.identifier.volume6-
dc.identifier.issue15-
dc.identifier.spage12684-
dc.identifier.epage12691-
dc.identifier.eissn1944-8252-

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