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Anisotropic surface modulation of Pt catalysts for highly reversible Li-O 2 batteries: High index facet as a critical descriptor

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dc.contributor.authorSong, Kyeongse-
dc.contributor.authorJung, Jaepyeong-
dc.contributor.authorPark, Mihui-
dc.contributor.authorPark, Hyeokjun-
dc.contributor.authorKim, Hyung-Jin-
dc.contributor.authorChoi, Sang-Il-
dc.contributor.authorYang, Junghoon-
dc.contributor.authorKang, Kisuk-
dc.contributor.authorHan, Young-Kyu-
dc.contributor.authorKang, Yong-Mook-
dc.date.accessioned2020-04-25T07:47:44Z-
dc.date.available2020-04-25T07:47:44Z-
dc.date.created2019-07-15-
dc.date.issued2018-10-
dc.identifier.citationACS Catalysis, Vol.8 No.10, pp.9006-9015-
dc.identifier.issn2155-5435-
dc.identifier.other78638-
dc.identifier.urihttps://hdl.handle.net/10371/164987-
dc.description.abstractThe surface structure of solid catalysts has been regarded as a critical descriptor for determining the catalytic activities in various applications. However, structure-dependent catalytic activities have been rarely understood for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) within Li-O-2 batteries. Here, we succeeded in the preparation of a Pt catalyst with an anisotropic structure and demonstrated its high catalytic activity in nonaqueous Li-O-2 batteries. The cathode incorporating Pt exposed with high-index {411} facets showed greatly enhanced ORR and OER performance in comparison to commercial Pt/C cathode. The anisotropic Pt catalyst improved ORR activity with a large capacity of 12 985 mAh g(carbon)(-1), high rate performance, and stable cyclic retention up to 70 cycles with the capacity limited to 1000 mAh g(carbon)(-1) Furthermore, the anisotropic Pt catalyst exhibited high round-trip efficiency of similar to 87% with a low OER potential (3.1 V) at a current density of 200 mA g(carbon)(-1) Our first-principles calculations revealed that the high-index facets, which contain step edge, kink, and ledge sites, are significantly more reactive than the lown terms of surface energy and O-binding energy.-
dc.language영어-
dc.publisherAmerican Chemical Society-
dc.titleAnisotropic surface modulation of Pt catalysts for highly reversible Li-O 2 batteries: High index facet as a critical descriptor-
dc.typeArticle-
dc.contributor.AlternativeAuthor강기석-
dc.identifier.doi10.1021/acscatal.8b02172-
dc.citation.journaltitleACS Catalysis-
dc.identifier.wosid000447224100006-
dc.identifier.scopusid2-s2.0-85052734905-
dc.citation.endpage9015-
dc.citation.number10-
dc.citation.startpage9006-
dc.citation.volume8-
dc.identifier.sci000447224100006-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorKang, Kisuk-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.subject.keywordPlusLI-AIR BATTERIES-
dc.subject.keywordPlusLITHIUM-OXYGEN BATTERIES-
dc.subject.keywordPlusROUND-TRIP EFFICIENCY-
dc.subject.keywordPlusHIGH-CAPACITY-
dc.subject.keywordPlusELECTROCATALYTIC ACTIVITY-
dc.subject.keywordPlusPLATINUM NANOPARTICLES-
dc.subject.keywordPlusFREE CATHODE-
dc.subject.keywordPlusLI2O2-
dc.subject.keywordPlusDECOMPOSITION-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordAuthoroxygen reduction reaction-
dc.subject.keywordAuthoroxygen evolution reaction-
dc.subject.keywordAuthoranisotropic surface-
dc.subject.keywordAuthorhigh index facet-
dc.subject.keywordAuthorelectrocatalyst-
dc.subject.keywordAuthorLi-O-2 battery-
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