Collect. Czech. Chem. Commun. 1994, 59, 2604-2610

Electron Donating and Acid-Base Properties of Cerium Oxide and Its Mixed Oxides with Alumina

Sankaran Sugunan and Jacob M. Jalaja

Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, S. India


The electron donating properties of ceria activated at 300, 500 and 800 °C and its mixed oxides with alumina are reported from the studies on adsorption of electron acceptors of various electron affinity. The surface acidity/basicity of the oxides have been determined by titration method and H0,max values are reported. The limit of electron transfer from oxide surface is between 1.77 and 2.40 eV in terms of the electron affinity of the electron acceptor. Ceria promotes the electron donating of alumina without changing the limit of electron transfer.