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dc.contributor.author선양국-
dc.date.accessioned2017-03-29T02:39:57Z-
dc.date.available2017-03-29T02:39:57Z-
dc.date.issued2015-07-
dc.identifier.citationNANO LETTERS, v. 15, NO 7, Page. 4261-4268en_US
dc.identifier.issn1530-6984-
dc.identifier.issn1530-6992-
dc.identifier.urihttp://pubs.acs.org/doi/abs/10.1021/nl504425h-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/26410-
dc.description.abstractAmong many challenges present in Li-air batteries, one of the main reasons of low efficiency is the high charge overpotential due to the slow oxygen evolution reaction (OER). Here, we present systematic evaluation of Pt, Pd, and Ru nanopartides supported on rGO as OER electrocatalysts in Li-air cell cathodes with LiCF3SO3-tetra(ethylene glycol) dimethyl ether (TEGDME) salt-electrolyte system. All of the noble metals explored could lower the charge overpotentials, and among them, Ru-rGO hybrids exhibited the most stable cycling performance and the lowest charge overpotentials. Role of Ru nanopartides in boosting oxidation kinetics of the discharge products were investigated. Apparent behavior of Ru nanoparticles was different from the conventional electrocatalysts that lower activation barrier through electron transfer, because the major contribution of Ru nanopartides in lowering charge overpotential is to control the nature of the discharge products. Ru nanopartides facilitated thin film-like or nanoparticulate Li2O2 formation during oxygen reduction reaction (ORR), which decomposes at lower potentials during charge, although the conventional role as electrocatalysts during OER cannot be ruled out. Pt-and Pd-rGO hybrids showed fluctuating potential profiles during the cycling. Although Pt- and Pd-rGO decomposed the electrolyte after electrochemical cycling, no electrolyte instability was observed with Ru-rGO hybrids. This study provides the possibility of screening selective electrocatalysts for Li-air cells while maintaining electrolyte stability.en_US
dc.description.sponsorshipThis work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation of Planning (KETEP) grant funded by the Korea government of Ministry of Knowledge Economy (No. 20124010203310). This research was supported by Pioneer Research Center Program (grant no. NRF-2012-0009577) through the National Research Foundation of Korea (NRF). This work was also supported by the U.S. Department of Energy under Contract DE-AC0206CH11357, with the main support provided by the Vehicle Technologies Office, Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE).en_US
dc.language.isoenen_US
dc.publisherAMER CHEMICAL SOCen_US
dc.subjectlithium-air batteriesen_US
dc.subjectcatalystsen_US
dc.subjectnoble metalsen_US
dc.subjectelectrolyte stabilityen_US
dc.subjectcatalytic mechanismen_US
dc.titleStudy on the Catalytic Activity of Noble Metal Nanoparticles on Reduced Graphene Oxide for Oxygen Evolution Reactions in Lithium-Air Batteriesen_US
dc.typeArticleen_US
dc.relation.no7-
dc.relation.volume15-
dc.identifier.doi10.1021/nl504425h-
dc.relation.page4261-4268-
dc.relation.journalNANO LETTERS-
dc.contributor.googleauthorJeong, Yo Sub-
dc.contributor.googleauthorPark, Jin-Bum-
dc.contributor.googleauthorJung, Hun-Gi-
dc.contributor.googleauthorKim, Jooho-
dc.contributor.googleauthorLuo, Xiangyi-
dc.contributor.googleauthorLu, Jun-
dc.contributor.googleauthorCurtiss, Larry-
dc.contributor.googleauthorAmine, Khalil-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorScrosati, Bruno-
dc.relation.code2015000565-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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