Abstract
Mo03 zeolite (MoC)3-NaY zeolite) catalyst was prepared by the thermal decomposition of ammonium molybdate adsorbed in the NaY zeolite in aqueous media. The catalyst prepared thus was characte- rized by scanning electron microscope (SEM), measuring surface area (BET), X-ray diffraction, chemical analysis, effect of CO on adsorbed SO;, and the e.s.r. technique. The electron-accepting and -donating properties were also studied by measuring the concentration ofthiophenazine cation radical (TPQD*) and tetracyanoethylene anion radical (TONE ) formed. Ten percent M0+6 of MoOs-NaY zeolite when activated at 450°Cn vacuum changed to Mo+5 ions. The formation of Mo+3 was observed during 802 reduction by CO at 450°C.
Published Version
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