A novel microwave assisted process for the synthesis of nanostructured ruthenium catalysts active in the hydrogenation of phenol to cyclohexanone

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• 作者：Anna Maria Raspolli Galletti ; Claudia Antonetti ; Iginio Longo ; Gustavo Capannelli ; Anna Maria Venezia
• 关键词：Ruthenium ; Nanocatalyst ; Microwave ; Hydrogenation ; Cyclohexanone
• 刊名：Applied Catalysis A: General
• 出版年：2008
• 出版时间：15 November 2008
• 年：2008
• 卷：350
• 期：1
• 页码：46-52
• 全文大小：607 K

文摘

An efficient, cheap and safe process for the solvothermal synthesis of ruthenium nanocatalysts has been developed: it involves the innovative use of a microwave (MW) applicator for the in situ activation of the reaction in a stirred glass vessel without resorting to an oven. The synthesis was carried out by direct MW irradiation of an alcohol or glycol solution of the metal precursor RuCl₃nH₂O, in the presence of PVP (poly-N-vinyl-2-pyrrolidone) as stabilizing agent and eventually of γ-Al₂O₃ as support. The addition of PVP appears not to be necessary for the in situ preparation of the supported systems. The synthesized nanocatalysts were characterized by UV–Vis, TEM and XPS measurements: colloidal and supported nanoparticles with an average diameter about 2 nm and a narrow distribution of sizes were obtained. The supported systems showed interesting performances in the selective hydrogenation of phenol to cyclohexanone.