| Abstract Scope |
Catalyst-support interaction and interface play a critical role in heterogeneous catalysis. CeO2 along with other oxides constitutes an important class of catalyst supports that can exchange oxygen rapidly under variable reducing or oxidizing conditions, which is mainly accomplished by a reversible valence change of the cerium ions (2Ce(IV)O2 <--> Ce2(III)O3 + 1/2O2) with formation or elimination of oxygen vacancies. Oxygen exchange or charge transfer during the reduction and oxidation (redox) processes are essential steps for many catalytic reactions at elevated temperatures. In this talk, I will present some recent progress on (1) synthesis and characterization of shape/crystal structure-controlled CeO2 support materials, (2) chemical etching surface modification of CeO2, (3) electrospinning synthesis of thermally stable CeO2 nanofibers, and (4) understanding the catalyst-support interaction and support promoting effect for many industrial catalysis applications such as in vehicle exhaust clean-up, carbon dioxide capture, and host materials of Li-S battery. |