Size effect in CO oxidation over magnesia-supported ZnO nanoparticles

作者：Didenko Olga Z; Kosmambetova Gulnara R; Strizhak Peter E^*

来源：Journal of Molecular Catalysis A: Chemical , 2011, 335(1-2): 14-23.

DOI：10.1016/j.molcata.2010.12.005

• ZnO
• Colloidal technique
• Particle size distribution
• CO oxidation
• Quantum confinement effect

The size effect of ZnO nanoparticles on catalytic activity of ZnO/MgO solids was studied in CO oxidation. We have developed a simple method for preparing supported materials containing ZnO nanoparticles of a controllable size with the same chemical composition, structure, and shape. We revealed that the turnover frequency of CO oxidation on ZnO nanoparticles of variable average radius (2.0-2.3 nm) shows bell-shaped dependence on ZnO nanoparticle size. A dependence of catalytic activity of ZnO nanoparticles on their electronic structure is found. This allows us to explain a maximum in the CO oxidation activity observed for ZnO nanoparticles with the size of about 2.2 nm within the framework of the quantum confinement effect.

• 出版日期2011-2-1