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催化学报 2008
聚乙烯吡咯烷酮稳定的钯纳米粒子催化加氢, PP. 1165-1168 Keywords: colloid,platinum,polymer,polyvinylpyrrolidone,hydrogenation Abstract: ？NanosizedcolloidalplatinumwaspreparedbyreductionofH2PtCl6inmethanol-watermixturebyrefluxing.Theparticlesizeandmorphologywerecharacterizedbytransmissionelectronmicroscopyandelectrondiffraction.Theinfluenceofpolyvinylpyrrolidone(PVP)molecularmass(MM),PVPconcentration,andreductiontimeonplatinumparticlesizewasinvestigated.Small(1-2nm)PtparticlesareformedinthecaseofPVPwithMM=1.2×104.WithincreasingpolymerMManddecreasingpolymerconcentration,largeaggregatesfromsmallparticlesappear.Highcatalyticactivityoftheobtainedcolloidalplatinuminhydrogenationofacetylenecompoundsisshown.TheeffectofPtparticlesizeonthecatalyticactivitywasstudied.
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