Novel Pt−MoO
x
catalytic systems were prepared by the oxidation−reduction of Pt−Mo alloy precursors
with different metal contents. According to XRD, SEM, and TEM data, oxidation at 550 °C led to the
destruction of initial alloys and the formation of molybdenum oxide and metallic platinum particles. As
evidenced by TPR H2, adsorption measurements, and in situ XRD analysis, during reduction in the presence
of Pt, molybdenum oxide can trap hydrogen already at ambient temperature with the formation of molybdenum
oxide hydroxide or molybdenum bronzes. In contrast to initial alloys, the oxidized systems showed significant
catalytic activity in toluene hydrogenation. The results suggested that both metallic platinum and molybdenum
oxide contribute to this activity. The sulfur resistance test revealed that Pt−MoO
x
systems had an enhanced
tolerance to sulfur contained in the feed.
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