Ru nanoparticles immobilized on montmorillonite by ionic liquids: A highly efficient heterogeneous catalyst for the hydrogenation of benzene
Ru nanoparticles immobilized on montmorillonite by ionic liquids: A highly efficient heterogeneous catalyst for the hydrogenation of benzene
复制标题
离子液体固定在蒙脱石上的纳米钌纳米粒子：苯加氢的高效非均相催化剂
DOI：
10.1002/anie.200502632
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发表时间：
2006-01-01
影响因子：
16.6
通讯作者：
Jiang, T
中科院分区：
文献类型：
--
作者：
Miao, SD;Liu, ZM;Jiang, T
由功能金属和不同基质组成的纳米复合材料的设计是制造各种催化剂、吸附剂以及光电器件的一个有前途的研究领域。蒙脱土（MMT）是一种天然存在的粘土，在结构上可以定义为带负电的二维硅酸盐片层，这些片层由层间阳离子物质分隔开，与其他阳离子具有高交换能力。 [1]此类层状材料已被用作复合材料制备的主体材料，并在催化、分离、光电领域具有潜在的应用前景。 [2]例如，沉积在具有表面活性剂的 MMT 上的 Pd 纳米粒子对 1-苯基-1-戊炔部分氢化为 1-苯基-顺-1-戊烯表现出高选择性，[3] 并且 Sc3+ 交换的 MMT 已被证明可以作为迈克尔反应的有效催化剂。 [4]对于基于MMT的催化剂，催化纳米颗粒通常借助表面活性剂或聚合物嵌入到层间空间或沉积在MMT的外表面。[3, 5] 近年来，室温离子液体（ILs）因其独特的性质而备受关注，特别是其极低的蒸气压、高热稳定性和良好的化学稳定性以及对有机和无机化合物的优异溶解能力，并且它们已被广泛用作不同过程的环境友好溶剂，包括化学反应[6]和分离。[7]离子液体也是稳定金属纳米粒子的有吸引力的介质。[8]最近，人们发现通过1,1,3,3-四甲基乳酸胍固定在分子筛SBA-15上的钯纳米颗粒对加氢反应表现出较高的催化活性。 [9]
The design of nanocomposites consisting of functional metals and different matrices is a promising research area for the fabrication of a variety of catalysts, adsorbents, and optical and electrical devices. Montmorillonite (MMT), which is a type of naturally occurring clay, can be structurally defined as layers of negatively charged two-dimensional silicate sheets that are separated by interlayer cationic species with a high exchange ability for other cations.[1] Such layered materials have been used as host materials for the preparation of composites and have potential applications in catalysis, separation, and the optical and electrical fields.[2] For example, Pd nanoparticles deposited on MMT with surfactants exhibit a high selectivity for the partial hydrogenation of 1-phenyl-1-pentyne to 1-phenyl-cis-1-pentene,[3] and Sc3+-exchanged MMT has been demonstrated to function as an efficient catalyst for the Michael reaction.[4] For MMT-based catalysts, the catalytic nanoparticles are generally intercalated into the interlayer spaces or deposited on the outer surfaces of MMT with the aid of surfactants or polymers.[3, 5] In recent years, room-temperature ionic liquids (ILs) have attracted much attention due to their unusual properties, especially their extremely low vapor pressure, high thermal and good chemical stability, and excellent solvent power for organic and inorganic compounds, and they have been widely utilized as environmentally benign solvents for different processes, including chemical reactions [6] and separations.[7] ILs are also attractive media to stabilize metal nanoparticles.[8] Recently, Pd nanoparticles immobilized on the molecular sieve SBA-15 by 1, 1, 3, 3-tetramethylguanidinium lactate have been found to exhibit high catalytic activity for hydrogenation reactions.[9]