Effect of Pretreatment Conditions on Particle Size of Bimetallic Pt–Au Catalysts Supported on ZnO/Al2O3 and Its Activity for Toluene Oxidation
Bimetallic Pt–Au catalysts supported on ZnO/Al2O3 were prepared by incipient wetness impregnation (IW-IMP) method with different pretreatment conditions such as flow velocity, calcination temperature, and heating rate under H2 during the calcination procedure, and characterized by X-ray diffraction (XRD), CO chemisorption, and scanning transmission electron microscopy (STEM) equipped energy dispersive spectroscopy (EDS). Furthermore, catalytic activity for complete oxidation of toluene was measured using a flow reactor under atmospheric pressure. Finally, relationship between the particle sizes with pretreatment conditions and catalytic activity for toluene on the bimetallic Pt–Au catalysts was discussed. In these results, nanosized bimetallic Pt–Au particles on ZnO/Al2O3 could be prepared by IW-IMP method. Relationship between the Pt and Au particle size and activity for toluene oxidation was clearly observed.
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Document Type: Research Article
Publication date: 2010-09-01
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