Polyoxomolybdate-stabilized Ru0 nanoparticles deposited on mesoporous silica as catalysts for aromatic hydrogenation
Polyoxomolybdate-stabilized Ru0 nanoparticles deposited on mesoporous silica as catalysts for aromatic hydrogenation
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DOI：
10.1002/cphc.200700533
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发表时间：
2007-12-20
期刊：
影响因子：
2.9
通讯作者：
Proust, Anna
中科院分区：
文献类型：
--
作者：
Boujday, Souhir;Blanchard, Juliette;Proust, Anna
我们使用聚氧代谢物作为制备多相催化剂的前体。在起始分子前体 [{Ru(C6Me6)}(2)Mo5O18{Ru(C6Me6)(H2O)}] 中，三个钌芳烃片段负载在形式上空缺的 Lindqvist 型多钼酸盐上。该物质通过初湿浸渍引入到 SBA-15 型介孔二氧化硅的孔隙中。还原气氛下系统的演变可以通过多种方法来跟踪，例如程序升温还原 (TPR)、Roman 和 X 射线吸收光谱 (XAS)。结果表明，接枝到二氧化硅上后保留了多金属氧酸盐结构，并允许还原后 Ru-0 纳米粒子的稳定化。所得系统在苯加氢中表现出令人感兴趣的催化活性。
We use polyoxometolotes as precursors for the preparation of heterogeneous catalysts. In the starting molecular precursor [{Ru(C6Me6)}(2)Mo5O18{Ru(C6Me6)(H2O)}], three ruthenium arene fragments are supported on a formally lacunary Lindqvist-type polyoxomolybdate. This species was introduced by incipient wetness impregnation into the porosity of a SBA-15-type mesoporous silica. The evolution of the system under reducing atmosphere is followed by several methods, such as temperature-programmed reduction (TPR), Roman, and X-ray absorption spectroscopy (XAS). The results indicate that the polyoxometalate structure is retained after grafting on silica and allows the stabilization of Ru-0 nanoparticles after reduction. The resulting system exhibits interesting catalytic activity in benzene hydrogenation.