title: Discovery of face-centered-cubic ruthenium nanoparticles: facile size-controlled synthesis using the chemical reduction method.
abstract: We report the first discovery of pure face-centered-cubic (fcc) Ru nanoparticles. Although the fcc structure does not exist in the bulk Ru phase diagram, fcc Ru was obtained at room temperature because of the nanosize effect. We succeeded in separately synthesizing uniformly sized nanoparticles of both fcc and hcp Ru having diameters of 2-5.5 nm by simple chemical reduction methods with different metal precursors. The prepared fcc and hcp nanoparticles were both supported on γ-Al2O3, and their catalytic activities in CO oxidation were investigated and found to depend on their structure and size.
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Kohei
authors.initials: K
authors.lastname: Kusada
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Kobayashi
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Syo
authors.initials: S
authors.lastname: Matsumura
authors.forename: Naoya
authors.initials: N
authors.lastname: Sumi
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Sato
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Nagaoka
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Kubota
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa