Catalytic oxidation of benzyl alcohol on Au or Au–Pd nanoparticles confined in mesoporous silica

In this paper, we report the synthesis of Au/SBA-15 and Au–Pd/SBA-15 materials by impregnation and grafting methods. It was found that the Au–Pd/SBA-15 sample prepared by the grafting method could highly disperse metal nanoparticles in mesoporous channels of SBA-15 and exhibit excellent catalytic pe...

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Veröffentlicht in:Applied catalysis. B, Environmental Environmental, 2009-10, Vol.92 (1-2), p.202-208
Hauptverfasser: Ma, Chun Yan, Dou, Bao Juan, Li, Jin Jun, Cheng, Jie, Hu, Qin, Hao, Zheng Ping, Qiao, Shi Zhang
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Sprache:eng
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Zusammenfassung:In this paper, we report the synthesis of Au/SBA-15 and Au–Pd/SBA-15 materials by impregnation and grafting methods. It was found that the Au–Pd/SBA-15 sample prepared by the grafting method could highly disperse metal nanoparticles in mesoporous channels of SBA-15 and exhibit excellent catalytic performances for the selective oxidation of benzyl alcohol to benzaldehyde at mild reaction conditions (air atmosphere, 80°C). The prevention of agglomeration and leaching of gold nanoparticles by restricting them inside the mesopores of SBA-15 leads to a high stability of Au–Pd/SBA-15. In both approaches, the addition of Pd to Au/SBA-15 catalysts can decrease the size of gold nanoparticles, which attributes to higher activity for the selective aerobic oxidation of benzyl alcohol.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2009.07.007