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Kim, Guntae
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM


Cation-swapped homogeneous nanoparticles in perovskite oxides for high power density

DC Field Value Language Joo, Sangwook ko Kwon, Ohhun ko Kim, Kyeounghak ko Kim, Seona ko Kim, Hyunmin ko Shin, Jeeyoung ko Jeong, Hu Young ko Sengodan, Sivaprakash ko Han, Jeong Woo ko Kim, Guntae ko 2019-05-14T06:34:43Z - 2019-02-22 ko 2019-02 ko
dc.identifier.citation NATURE COMMUNICATIONS, v.10, no.1, pp.697 ko
dc.identifier.issn 2041-1723 ko
dc.identifier.uri -
dc.description.abstract Exsolution has been intensively studied in the fields of energy conversion and storage as a method for the preparation of catalytically active and durable metal nanoparticles. Under typical conditions, however, only a limited number of nanoparticles can be exsolved from the host oxides. Herein, we report the preparation of catalytic nanoparticles by selective exsolution through topotactic ion exchange, where deposited Fe guest cations can be exchanged with Co host cations in PrBaMn1.7Co0.3O5+delta. Interestingly, this phenomenon spontaneously yields the host PrBaMn1.7Fe0.3O5+delta, liberating all the Co cations from the host owing to the favorable incorporation energy of Fe into the lattice of the parent host (Delta E-incorporation = -0.41 eV) and the cation exchange energy (Delta E-exchange = -0.34 eV). Remarkably, the increase in the number of exsolved nanoparticles leads to their improved catalytic activity as a solid oxide fuel cell electrode and in the dry reforming of methane. ko
dc.language 영어 ko
dc.title Cation-swapped homogeneous nanoparticles in perovskite oxides for high power density ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85061282057 ko
dc.identifier.wosid 000458297200001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41467-019-08624-0 ko
dc.identifier.url ko
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