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Preparation and Catalytic Properties of Amphiphilic Copolymer-Stabilized Platinum Metals Colloids
1Polymer Chemistry Laboratory, Chinese Academy of Sciences and China Petro-Chemical Corporation, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, People's Republic of China
Abstract:
Several metal colloids stabilized by an amphiphilic copolymer, poly(1-vinylpyrrolidone-co-acrylic acid) (abbreviated as PVPAA), were prepared by refluxing alcohol-water mixed solutions of the corresponding metal precursors. They had small particle sizes and narrow size distributions. Their catalytic activity was tested by hydrogenation of cyclooctene, 1-dodecene, and ortho-chloronitrobenzene (o-CNB). With the introduction of nickel(II) ions to a PVPAA-stabilized platinum catalytic system, selective hydrogenation of o-CNB to ortho-chloroaniline (o-CAN) with 97.1% selectivity and 100% conversion was obtained. Copyright 2000 Academic Press.
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