Abstract
Mo dimer oxy-carbide species were synthesized in the supercage of NaY zeolite by adsorption of Mo(CO) 6 vapor at saturation, followed by thermal decomposition in vacuum. TPD, EXAFS, XPS and XRF data revealed that a Mo dimer was attached in a supercage by a saturation adsorption–thermal decomposition at 573 K and that up to four Mo dimers in a supercage were stepwisely formed without aggregation after four cycles. The Mo dimer oxy-carbide species exhibited a unique methanol decomposition reaction to produce CH 4, CO 2, and H 2 in an approximate ratio of 1 : 1 : 2. This reaction was characteristic of the Mo dimer oxy-carbide species and was never observed for other Mo species such as oxidized and reduced Mo species in NaY supercages.
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