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dc.contributor.authorChang, Yun-Minen_US
dc.contributor.authorWu, Pu-Weien_US
dc.contributor.authorWu, Cheng-Yeouen_US
dc.contributor.authorHsieh, Yu-Chien_US
dc.date.accessioned2019-04-02T05:59:39Z-
dc.date.available2019-04-02T05:59:39Z-
dc.date.issued2009-04-15en_US
dc.identifier.issn0378-7753en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.jpowsour.2008.12.101en_US
dc.identifier.urihttp://hdl.handle.net/11536/149769-
dc.description.abstractThe amorphous citrate precursor method was employed to prepare perovskite of La0.6Ca0.4Co0.8Ir0.2O3 as a bi-functional electrocatalyst for oxygen reduction and evolution in an alkaline electrolyte. The X-ray diffraction pattern of the as-synthesized powders exhibited a majority phase identical to that of La0.6Ca0.4CoO3, indicating successful incorporation of Ir4(+) at the Co cation sites. Scanning Electron Microscope images demonstrated a foam-like microstructure with a surface area of 13.31 m(2) g(-1). For electrochemical characterization, the La0.6Ca0.4CO0.8Ir0.2O3 particles were supported on carbon nanocapsules (CNCs) and deposited on commercially available gas diffusion electrodes with a loading of 2.4 mg cm(-2). In current- potential polarizations, La0.6Ca0.4Co0.8Ir0.2O3/CNCs revealed more enhanced bifunctional catalytic abilities than La0.6Ca0.4CoO3/CNCs. Similar behaviors were observed in galvanostatic profiles for oxygen reduction and evolution at current densities of 50 and 100mAcm(-2) for 10 min. Moreover, notable changes from zeta potential measurements were recorded for La0.6Ca0.4Co0.08Ir0.02O3 relative to La0.06Ca0.4CoO3, In lifetime determinations, where a repeated 3 h sequence of oxygen reduction/resting/oxygen evolution/resting was imposed, La0.6Ca0.4Co0.8Ir0.2O3/CNCs delivered a stable and sustainable behavior with moderate degradation. (C) 2008 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectPerovskiteen_US
dc.subjectBi-functional electrocatalysten_US
dc.subjectAlkaline electrolyteen_US
dc.subjectOxygen reductionen_US
dc.subjectOxygen evolutionen_US
dc.titleSynthesis of La0.6Ca0.4Co0.8Ir0.2O3 perovskite for bi-functional catalysis in an alkaline electrolyteen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.jpowsour.2008.12.101en_US
dc.identifier.journalJOURNAL OF POWER SOURCESen_US
dc.citation.volume189en_US
dc.citation.spage1003en_US
dc.citation.epage1007en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000265310300019en_US
dc.citation.woscount26en_US
Appears in Collections:Articles