Application of Microwave-Assisted Deposition for the Synthesis of Noble Metal Particles on Ti-Containing Mesoporous Silica
Application of Microwave-Assisted Deposition for the Synthesis of Noble Metal Particles on Ti-Containing Mesoporous Silica
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DOI：
10.1007/s10562-009-9861-x
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发表时间：
2009-01
影响因子：
2.8
通讯作者：
S. Shironita;T. Takasaki;T. Kamegawa;K. Mori;H. Yamashita
中科院分区：
文献类型：
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作者：
S. Shironita;T. Takasaki;T. Kamegawa;K. Mori;H. Yamashita
以介孔氧化硅为载体，在微波辐射下合成了纳米级、均匀的贵金属（Pt和Au）粒子。通过CO吸附，XAFS和TEM分析的表征表明，金属颗粒的大小取决于制备方法，并且与常规制备的浸渍催化剂相比，在微波辅助的金属催化剂上形成较小尺寸的金属颗粒。这些纳米尺寸的金属催化剂是有用的作为有效的催化剂的各种反应，如硝基苯的加氢和CO的氧化。这种方法也成功地适用于沉积Au金属与较小的尺寸上的Ti-HMS。
A facile and unique methodology to synthesize the nano-sized and uniform noble metal (Pt and Au) particles has been developed using mesoporous silica support including single-site titanium oxide moieties (Ti-HMS) under microwave irradiation. Characterization by CO adsorption, XAFS, and TEM analysis revealed that the size of metal particles depends on the preparation methods and that the smaller sizes of metal particles were formed on the microwave-assisted metal catalysts compared to the conventionally prepared impregnated catalysts. These nano-sized metal catalysts are useful as efficient catalysts for the various reactions such as the hydrogenation of nitrobenzene and oxidation of CO. This method is also successfully applicable to the deposition of Au metal with smaller size on the Ti-HMS.