Discovery of Face-Centered-Cubic Ruthenium Nanoparticles: Facile Size-Controlled Synthesis Using the Chemical Reduction Method

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• 作者：Kohei Kusada ; Hirokazu Kobayashi ; Tomokazu Yamamoto ; Syo Matsumura ; Naoya ; Sumi ; Katsutoshi Sato ; Katsutoshi Nagaoka ; Yoshiki Kubota ; Hiroshi Kitagawa
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：April 17, 2013
• 年：2013
• 卷：135
• 期：15
• 页码：5493-5496
• 全文大小：301K
• 年卷期：v.135,no.15(April 17, 2013)
• ISSN：1520-5126

文摘

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鈥?.5 nm by simple chemical reduction methods with different metal precursors. The prepared fcc and hcp nanoparticles were both supported on 纬-Al₂O₃, and their catalytic activities in CO oxidation were investigated and found to depend on their structure and size.