Pt nanoparticles on titania nanotubes prepared by vapor-phase impregnation-decomposition method

被引:15
作者
Encarnacion Gomez, C. [1 ]
Vargas Garcia, J. R. [1 ]
Toledo Antonio, J. A. [2 ]
Cortes Jacome, M. A. [2 ]
Angeles Chavez, C. [2 ]
机构
[1] Natl Polytech Inst, Dept Met Eng, Mexico City 07300, DF, Mexico
[2] Petr Mexican Inst, Mexico City 07730, DF, Mexico
关键词
Titania; Nanotubes; Platinum nanoparticles; PHOTOCATALYTIC ACTIVITIES; OXIDATION; CATALYSTS; GROWTH; ADSORPTION; DEPOSITION; RAMAN;
D O I
10.1016/j.jallcom.2009.10.232
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Platinum (Pt) nanoparticles were prepared on mania nanotubes (TNTs) by vapor-phase impregnation-decomposition method using platinum acetylacetonate as precursor. TNTs and Pt precursor were mixed in 3 1 weight ratio before vapor-phase impregnation The mixed powders were heated at 453K for 10 min to evaporate the precursor in a horizontal tube quartz reactor at a total pressure of 66.6 kPa Then, the impregnated TNTs were moved to a higher temperature zone (673K) inside the tube reactor to achieve the precursor decomposition HAADF-STEM observations, AAS and XPS results revealed that this method allows the formation of uniformly distributed Pt nanoparticles on the surface of TNTs with a narrow distribution of particle size (2 1 nm mean size). Pt nanoparticles remain mainly as Pt(0) oxidation state with a Pt(0)/Pt(2+) atomic ratio of 3 9. (C) 2009 Elsevier B V All rights reserved
引用
收藏
页码:458 / 461
页数:4
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