Assembling Forms of Active Phases Confined within SBA-15 Channels

Abstract

Abstract: The assembling forms of active phases in Pd/SBA-15(ad) and MoO3/SBA-15 catalyst samples, prepared via adsorption-reduction and impregnation-reduction, respectively, were characterized by N2 physisorption measurement. Based on N2 adsorption-desorption isotherms, it was speculated that the palladium species in Pd/SBA-15(ad) exist as nanoparticles, whereas the MoO3 species in MoO3/SBA-15 are layered dispersed on the wall within the SBA-15 channels. These speculations were further confirmed by HR-TEM observation. The SBA-15 confined uniform Pd nanoparticles were efficient for solvent-free aerobic oxidation of benzyl alcohol.

Key words: palladium, molybdenum trioxide, active phase, assembling form, SBA-15 zeolite, adsorption-desorption isotherm, benzyl alcohol, oxidation

LI Changli;ZHANG Qinghong*;WANG Ye;WAN Huilin*. Assembling Forms of Active Phases Confined within SBA-15 Channels[J]. Chinese Journal of Catalysis, 2008, 29(1): 37-40.

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Assembling Forms of Active Phases Confined within SBA-15 Channels

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