A novel reusable platinum nanocatalyst |
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Authors: | Weiqiang Zhou Jing Wang Chuanyi Wang Yukou Du Jingkun Xu Ping Yang |
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Affiliation: | 1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China;2. Department of Chemistry, Tufts University, Medford, MA 02155, USA;3. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, PR China |
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Abstract: | Recyclability of noble metal catalysts is a challenging issue when dealing with their industrial applications. Smart pH-sensitive Pt nanoparticles were successfully prepared for the first time by using octa(N,N-diacetic acid phenylamine)silsesquioxane (OAPAS) as a macromolecular protective agent. As-prepared Pt nanoparticles can self-aggregate or redisperse by only changing the pH of the system solution. In the weak acidic or alkaline solution (pH > 4.0), the Pt nanoparticles dispersed homogenously; while in the acidic solution (pH = 2.5), they self-aggregated. The dynamic self-aggregation and redispersion processes of the Pt nanoparticles driven by pH changes were revealed by transmission electron microscopy measurements. Electrocatalytic experiments proved that the platinum nanoparticles as a recyclable catalyst showed excellent activity for the hydrogenation of aldehyde after runs of five times. Such platinum nanoparticles are thereby anticipated to have great potential functioning as “smart” catalysts for industrial applications. |
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Keywords: | Platinum nanoparticles Colloidal nanocatalysts Recyclability Hydrogenation of aldehyde |
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