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.
Department of Chemical Engineering, Sunchon National University, Suncheon, Jeonnam 540-742, Korea.
Ki-Joong
KJ
Kim
Sang-Jun
SJ
Kang
Min-Chul
MC
Chung
Sang-Chul
SC
Jung
Woon-Jo
WJ
Jeong
Gye-Choon
GC
Park
Sang-Chai
SC
Kim
Su-Il
SI
Boo
Seung-Won
SW
Jeong
Ho-Geun
HG
Ahn