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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER


Ordered mesoporous Co3O4 spinels as stable, bifunctional, noble metal-free oxygen electrocatalysts

DC Field Value Language Sa, Young Jin ko Kwon, Kyungjung ko Cheon, Jae Yeong ko Kleitz, Freddy ko Joo, Sang Hoon ko 2014-04-09T08:28:15Z - 2013-08-30 ko 2013-09 ko
dc.identifier.citation JOURNAL OF MATERIALS CHEMISTRY A, v.1, no.34, pp.9992 - 10001 ko
dc.identifier.issn 2050-7488 ko
dc.identifier.uri -
dc.description.abstract We report the use of noble metal-free ordered mesoporous Co 3O4 spinels (meso-Co3O4), templated from KIT-6 mesoporous silica, as highly active and stable bifunctional electrocatalysts for both oxygen evolution and reduction reactions (OER and ORR, respectively). The meso-Co3O4 nanostructures showed high activity for OER in an alkaline medium (0.1 M KOH), which makes them comparable to the most active Ir/C catalyst and better than Co3O4 nanoparticles (NPs) and the Pt/C catalyst. Furthermore, meso-Co 3O4 exhibited enhanced stability, compared to Co 3O4 NPs. The enhanced activity and stability of meso-Co3O4 over Co3O4 NPs could be attributed to its high surface area and structural stability of the gyroid network structure in the meso-Co3O4 catalysts. The meso-Co3O4 nanostructures also showed promising activity for ORR and exhibited a methanol-tolerance superior to the Pt/C catalyst. The total overpotential of meso-Co3O4 for OER (at 10 mA cm-2) and ORR (at -3 mA cm-2) was 1.034 V, which is on a par with noble metal-based catalysts. This work demonstrates that directing metal oxides into mesostructures is a promising means of preparing highly active, stable, bifunctional oxygen electrocatalysts that can potentially replace expensive noble metal-based catalysts. This design strategy can be extended to other reactions relevant to energy conversion and storage applications. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Ordered mesoporous Co3O4 spinels as stable, bifunctional, noble metal-free oxygen electrocatalysts ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84881453501 ko
dc.identifier.wosid 000322792900057 ko
dc.type.rims ART ko
dc.description.wostc 17 *
dc.description.scopustc 3 * 2015-02-28 * 2014-07-12 *
dc.identifier.doi 10.1039/c3ta11917c ko
dc.identifier.url ko
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