CO-OXIDATION REACTION ACTIVITY OF Pt CLUSTER CATALYSTS ON Ti0.9MO0.1O2 SUPPORT

Abstract

Platinum-based heterogeneous catalysts are critical to many important commercial chemical processes. However, their efficiency is extremely low on a per metal atom basis, because only the surface active-site atoms are used. Catalysts with clusters of atom dispersions are thus highly desirable to increase atom efficiency, but making them is challenging. Here we report the synthesis of a catalyst that consists of isolated clusters of Pt atoms anchored to the surfaces of Molybdenum-doped titanium oxide nanocrystallites. This cluster-atom catalyst has extremely high atom efficiency and shows excellent stability and activity for CO oxidation. The result showed that the highest activity and stability of catalyst with 0.2 wt.% loading of Pt are observed. These could be due to the partially vacant 5d orbitals of the positively charged, highvalent Pt atoms.