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Preparation of silica-supported Pd nanoparticle catalysts by an alcohol reduction method and evaluation of their catalytic properties in the dechlorination of an aromatic chloride

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Abstract

Reduction of a Pd(II) precursor in refluxing 2-propanol, ethanol, or methanol in the presence of dissolved NaOH afforded silica-supported Pd catalysts designated Pd/SiO2(Pr), Pd/SiO2(Et), and Pd/SiO2(Me), respectively. Pd/SiO2(Pr) consisted of metallic Pd particles (average particle size, 5.1 nm) dispersed in the porous structure of SiO2, whereas the Pd particles on Pd/SiO2(Et) and Pd/SiO2(Me) were larger. The catalytic activity of Pd/SiO2(Pr) in the dechlorination of 2,4,6-trichloroanisole in a solution of 2-propanol containing NaOH was greatly enhanced by the addition of methanol; the optimum rate occurred at 1 % v/v methanol. The activity of Pd/SiO2(Et) was also enhanced by methanol but to a lesser extent than that of Pd/SiO2(Pr). In contrast, Pd/SiO2(Me) exhibited no activity even in the presence of methanol.

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Acknowledgments

The author gratefully acknowledges financial support from the National Institute of Advanced Industrial Science and Technology (AIST).

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  1. National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan

    Yuji Ukisu

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Correspondence to Yuji Ukisu.

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Ukisu, Y. Preparation of silica-supported Pd nanoparticle catalysts by an alcohol reduction method and evaluation of their catalytic properties in the dechlorination of an aromatic chloride. Reac Kinet Mech Cat 114, 385–394 (2015). https://doi.org/10.1007/s11144-014-0807-y

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  • DOI: https://doi.org/10.1007/s11144-014-0807-y

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