Although Pt is extensively used as a catalyst to purify automotive exhaust gas, it is desirable to reduce Pt consumption through size reduction because Pt is a rare element and an expensive noble metal. In this study, we successfully loaded a Pt cluster on γ-alumina (γ-AlO) (Pt/γ-AlO) using [Pt(CO)(PPh)]Cl ( = 1, 2) as a precursor. In addition, we demonstrated that Pt is not present in the form of an oxide in Pt/γ-AlO but instead has a framework structure as a metal cluster. Moreover, we revealed that Pt/γ-AlO exhibits higher catalytic activity for carbon monoxide and propylene oxidation than γ-AlO-supported larger Pt nanoparticles (Pt/γ-AlO) prepared using the conventional impregnation method. Recently, our group discovered a simple method for synthesizing the precursor [Pt(CO)(PPh)]Cl . Furthermore, Pt is a Pt cluster within the size range associated with high catalytic activity. By combining our established synthesis and loading methods, other groups can conduct further research on Pt/γ-AlO to explore its catalytic activities in greater depth.
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| http://dx.doi.org/10.1039/c9na00579j | DOI Listing |
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