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The 3D atomic scale and electronic structure characterization of novel fcc ruthenium nanoparticles using synchrotron light source

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dc.contributor.author Kumara, L.S.R.
dc.contributor.author Sakata, O.
dc.contributor.author Kohara, S.
dc.contributor.author Song, C.
dc.contributor.author Yang, A.
dc.contributor.author Kusada, K.
dc.contributor.author Kobayashi, H.
dc.contributor.author Kitagawa, H.
dc.date.accessioned 2016-12-30T05:44:36Z
dc.date.available 2016-12-30T05:44:36Z
dc.date.issued 2016
dc.identifier.citation Kumara, L.S.R., Sakata, O., Kohara, S., Song, C., Yang, A., Kusada, K., Kobayashi, H. and Kitagawa, H. 2016. The 3D atomic scale and electronic structure characterization of novel fcc ruthenium nanoparticles using synchrotron light source. In Proceedings of the International Research Symposium on Pure and Applied Sciences (IRSPAS 2016), Faculty of Science, University of Kelaniya, Sri Lanka. p 50. en_US
dc.identifier.isbn 978-955-704-008-0
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/15703
dc.description.abstract Ruthenium (Ru) is a 4d transition metal that in the bulk adopts hexagonal closepacked (hcp) structure at all temperature ranges, and novel face-centered cubic (fcc) Ru nanoparticles (NPs) have been observed to be more efficient than conventional hcp Ru NPs larger than 3 nm. It has recently attracted much attention as a potential application in removal of car exhausts due to high catalytic activity for CO oxidation and preventing CO poisoning in fuel-cell system. We here report the 3-dimentational atomic-scale structures of fcc and hcp Ru NPs using high-energy X-ray diffraction (HEXRD), Rietveld analysis, pair distribution function (PDF), and reverse Monte Carlo (RMC) modelling. Hard X-ray photoelectron spectroscopy (HAXPES) can provide important information on the influence of NP size on electronic properties. The HEXRD and HAXPES of Ru NPs were performed at BL04B2 and BL15XU at SPring-8, the world largest third-generation (8 GeV) synchrotron radiation facility located in Hyōgo prefecture, Japan. We observed higher stability of the lattice distortion of fcc Ru NPs with increasing particle size. The PDF analysis results show that the structural disordered Ru NPs at short- to intermediate-range atomic distances. The order parameter for fcc Ru NPs decreased with increasing particle size due to the loosely packing atomic arrangement and may explain an origin of higher catalytic activity of fcc Ru NPs. In this study, the observed trend of increasing catalytic activity of fcc Ru NPs was also discussed using their core-levels and valence band electronic structures. This work was partly supported by ACCEL, Japan Science and Technology Agency (JST) and also partly supported by Ministry of Education, Culture, Sports, Science and Technology of Japan (OS: 15K04616). en_US
dc.language.iso en en_US
dc.publisher Faculty of Science, University of Kelaniya, Sri Lanka en_US
dc.subject Nanoparticles en_US
dc.subject Synchrotron radiation en_US
dc.subject High-energy X-ray diffraction en_US
dc.subject Electronic structure en_US
dc.title The 3D atomic scale and electronic structure characterization of novel fcc ruthenium nanoparticles using synchrotron light source en_US
dc.type Article en_US


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