Original Paper

Topics in Catalysis

, Volume 47, Issue 1, pp 22-31

Nanocatalysis on Supported Oxides for CO Oxidation

  • Garry GlaspellAffiliated withDepartment of Chemistry, Virginia Commonwealth University
  • , Hassan M. A. HassanAffiliated withDepartment of Chemistry, Virginia Commonwealth University
  • , Ahmed ElzatahryAffiliated withDepartment of Chemistry, Virginia Commonwealth University
  • , Victor AbdalsayedAffiliated withDepartment of Chemistry, Virginia Commonwealth University
  • , M. Samy El-ShallAffiliated withDepartment of Chemistry, Virginia Commonwealth University Email author 

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Abstract

Active gold and palladium nanoparticles supported on a variety of oxides (CeO2, ZrO2, Al2O3, SiO2, MgO and ZnO) were synthesized using laser vaporization and microwave irradiation methods. The catalytic activities for CO oxidation on the nanoparticle catalysts were evaluated and compared among different oxide supports. The effect of shape on the catalytic activity is demonstrated by comparing the activities of the Au and Pd catalysts deposited on MgO nanocubes and ZnO nanobelts. The Au/CeO2 nanoparticles deposited on MgO nanocubes exhibit high catalytic activity and stability. The enhanced catalytic activity is attributed to the presence of a significant concentration of the corner and edge sites in MgO nanocubes. The Au- and Pd-doped Mn2O3 nanoparticles show promising results for the low temperature CO oxidation. Several approaches for incorporating the Au and Pd nanocatalysts within mesoporous oxide supports are presented and discussed.

Keywords

Au/CeO2 Pd/CeO2 CO oxidation Laser synthesis Microwave synthesis MgO cubes ZnO belts