The effects of morphology on the oxidation of ceria by water and carbon dioxide

Luke J. Venstrom, Nicholas Petkovich, Stephen Rudisill, Andreas Stein, Jane H Davidson

Research output: Contribution to journalArticle

81 Scopus citations

Abstract

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 languageEnglish (US)
Article number011005
JournalJournal of Solar Energy Engineering, Transactions of the ASME
Volume134
Issue number1
DOIs
StatePublished - Jan 12 2012

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