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Effect of Pretreatment Conditions on Particle Size of Bimetallic Pt–Au Catalysts Supported on ZnO/Al2O3 and Its Activity for Toluene Oxidation

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Abstract:

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.

Keywords: BIMETALLIC PT-AU; INCIPIENT WETNESS IMPREGNATION; STEM; TOLUENE OXIDATION; XRD

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.3085

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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