dc.date.accessioned | 2020-12-01T20:34:07Z | |
dc.date.available | 2020-12-01T20:34:07Z | |
dc.date.created | 2020-11-05T12:23:57Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Kalyva, Maria Evangelou Sunding, Martin Fleissner Gunnæs, Anette Eleonora Diplas, Spyridon Redekop, Evgeniy . Correlation between surface chemistry and morphology of PtCu and Pt nanoparticles during oxidation-reduction cycle. Applied Surface Science. 2020, 532, 1-6 | |
dc.identifier.uri | http://hdl.handle.net/10852/81330 | |
dc.description.abstract | Process conditions during catalytic reactions induce significant changes in surface chemistry and structure of bi- (mono) metallic nanoparticles leading to their deactivation, and this can ultimately affect the reactions long-term performance. Here PtCu and Pt model nanoparticles are prepared by microwave synthesis and characterized by X-ray diffraction (XRD). Surface chemical and morphological changes of the nanoparticles during high-temperature oxidation and reduction treatments cycle are correlated by near in situ X-ray photoelectron spectroscopy (XPS) and ex situ transmission electron microscopy (TEM) - energy-dispersive X-ray spectroscopy (EDS) studies. At 300 °C the surface atomic composition of the PtCu nanoparticles switches reversibly upon the cycle and at the same time their morphology and composition are maintained. At 400 °C, the surface atomic composition does not fully restore and, while the shape is maintained, the size and composition are not. This occurs by a mechanism of Cu leaching out from the nanoparticles. These data delineate potential operating conditions for stable PtCu nanocatalysts. | |
dc.language | EN | |
dc.publisher | North-Holland | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Correlation between surface chemistry and morphology of PtCu and Pt nanoparticles during oxidation-reduction cycle | |
dc.type | Journal article | |
dc.creator.author | Kalyva, Maria Evangelou | |
dc.creator.author | Sunding, Martin Fleissner | |
dc.creator.author | Gunnæs, Anette Eleonora | |
dc.creator.author | Diplas, Spyridon | |
dc.creator.author | Redekop, Evgeniy | |
cristin.unitcode | 185,15,17,10 | |
cristin.unitname | Senter for Materialvitenskap og Nanoteknologi kjemi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1845240 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Applied Surface Science&rft.volume=532&rft.spage=1&rft.date=2020 | |
dc.identifier.jtitle | Applied Surface Science | |
dc.identifier.volume | 532 | |
dc.identifier.doi | https://doi.org/10.1016/j.apsusc.2020.147369 | |
dc.identifier.urn | URN:NBN:no-84420 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0169-4332 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/81330/2/Kalyva_et.al._2020.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 147369 | |