Preparation and immobilization of polymer-protected bimetallic colloids
Preparation and immobilization of polymer-protected bimetallic colloids
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DOI：
10.1007/bf00338911
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发表时间：
1991
期刊：
影响因子：
3.2
通讯作者：
Y. Wang;Hanfan Liu
中科院分区：
文献类型：
--
作者：
Y. Wang;Hanfan Liu
通过将酒精溶液在保护性聚合物的存在下回流，将铂-铑或铑-金的混合金属离子共还原，得到相应的稳定双金属溶胶，该溶胶又与含有硫醚配体的硅胶悬浮液相互作用，形成支撑的双金属催化剂。TEM和XRD测试表明双金属合金团簇的形成。该溶胶被用作顺式、顺式-1.5-环二烯选择性部分加氢制备环烯的催化剂。双金属溶胶催化剂PVP-Pt-Rh的活性约为单金属溶胶PVP-Rh的两倍。
Co-reduction of mixed metal ions of platinum-rhodium or rhodium-gold by refluxing its alcohol ic solution in presence of a protective polymer results in a corresponding stable bimetallic sol, which in turn interacts with a suspension of silica gel, bearing thioether ligand, to give supported bimetallic catalysts. The TEM and XRD measurements indicate the formation of the bimetallic alloy clusters. The sols are used as catalysts for the selective partial hydrogenation of cis, cis-1.5-cyclooctadiene to cyclooctene. The bimetallic sol catalyst PVP-Pt-Rh shows an activity which is about twice as that of the monometallic sol PVP-Rh.