Palladium nanowires and nanoparticles in mesoporous silica templates

被引:73
作者
Fukuoka, A [1 ]
Araki, H
Sakamoto, Y
Inagaki, S
Fukushima, Y
Ichikawa, M
机构
[1] Hokkaido Univ, Grad Sch Sci, Ctr Catalysis Res, Sapporo, Hokkaido 0600811, Japan
[2] Hokkaido Univ, Grad Sch Sci, Div Chem, Sapporo, Hokkaido 0600811, Japan
[3] Toyota Cent Res & Dev Labs Inc, Aichi 4801192, Japan
关键词
nanowires; nanoparticles; palladium; mesoporous silica; template synthesis; CO oxidation;
D O I
10.1016/S0020-1693(02)01541-4
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Nanowires and nanoparticles of palladium are synthesized in mesoporous silicas FSM-16 and HMM-1, and their structural characterization and catalytic performances in CO oxidation have been studied. FSM-16 and HMM-1 were impregnated with H2PdCl4. and the thermal treatment under O-2 or N-2 atmosphere led to high dispersion of H2PdCl4 into the one-dimensional channels of the mesoporous materials (channel diameter ca. 3 nm). UV-irradiation of the sample in the presence of water and methanol vapors and subsequent H-2-reduction resulted in the formation of Pd nanowires with the diameter less than 3 nm and the length up to 300 nm. In contrast, one-step H-2-reduction gave Pd nanoparticles in the mesopores. The Pd nanowires and nanoparticles were characterized by means of TEM, XRD, XAFS, and CO uptake. CO oxidation was performed as a test reaction to compare catalytic performances of the Pd nanowires and nanoparticles. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:371 / 378
页数:8
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