The oxidation of three-dimensionally ordered macroporous (3DOM) CeO 2 (ceria) by H 2O and CO 2 at 1100 K is presented in comparison to the oxidation of nonordered mesoporous and sintered, low porosity ceria. 3DOM ceria, which features interconnected and ordered pores, increases the maximum H 2 and CO production rates over the low porosity ceria by 125 and 260, respectively, and increases the maximum H 2 and CO production rates over the nonordered mesoporous cerium oxide by 75% and 175%, respectively. The increase in the kinetics of H 2O and CO 2 splitting with 3DOM ceria is attributed to its enhanced specific surface area and to its interconnected pore system that facilitates the transport of reacting species to and from oxidation sites.
|Original language||English (US)|
|Journal||Journal of Solar Energy Engineering, Transactions of the ASME|
|State||Published - Jan 12 2012|