Coupling Synergetic Effect between Ruthenium and Ruthenium Oxide with Size Effect of Ruthenium Particles on Ketone Catalytic Hydrogenation

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• 作者：Zhao Yang ; Dan Li ; Lei Zhang ; Dr. Jinbao Zheng ; Dr. Nuowei Zhang and Prof. Bing H. Chen
• 刊名：ChemCatChem
• 出版年：2017
• 出版时间：January 23, 2017
• 年：2017
• 卷：9
• 期：2
• 页码：338-346
• 全文大小：1771K
• ISSN：1867-3899

文摘

Carbon black-supported ruthenium catalysts (Ru/C) with different Ru particle sizes and varying fractions of surficial RuO₂ are prepared and studied for acetone hydrogenation. The size of Ru particles and the surficial RuO₂ species on the Ru particles are found to affect the acetone conversion. Ru particles with larger size provide a higher catalytic activity suggesting an important role of particle size. Moreover, for Ru particles with larger sizes, the conversion decreases along with the increase of surficial RuO₂ species fraction; however, an opposite trend is observed for cases with smaller Ru particles. Such distinguished catalytic acetone hydrogenation conversions for Ru/C with different particle sizes and varying surface RuO₂ content suggest a size-dependent synergetic effect, which, so far as we are concerned, is a new synergetic behavior between Ru and RuO₂ in hydrogenation catalysis that has never been reported before. CO chemisorption, XRD, temperature-programmed reduction, X-ray photoelectron spectroscopy, and high-resolution TEM are used to characterize the Ru particle sizes and the surficial RuO₂ species.