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Mesoporous Mn- and La-Doped Cerium Oxide/Cobalt Oxide Mixed Metal Catalysts for Methane Oxidation

TitleMesoporous Mn- and La-Doped Cerium Oxide/Cobalt Oxide Mixed Metal Catalysts for Methane Oxidation
Publication TypeJournal Article
Year of Publication2015
AuthorsVickers, SM, Gholami, R, Smith, KJ, MacLachlan, MJ
JournalAcs Applied Materials & Interfaces
Volume7
Pagination11460-11466
ISSN1944-8244
Abstract

New precious-metal-free mesoporous materials were investigated as catalysts for the complete oxidation of methane to carbon dioxide. Mesoporous cobalt oxide was first synthesized using KIT-6 mesoporous silica as a hard template. After removal of the silica, the cobalt oxide was itself used as a hard template to construct cerium oxide/cobalt oxide composite materials. Furthermore, cerium oxide/cobalt oxide composite materials doped with manganese and lanthanum were also prepared. All of the new composite materials retained the hierarchical long-range order of the original KIT-6 template. Temperature-programmed oxidation measurements showed that these cerium oxide/cobalt oxide and doped cerium oxide/cobalt oxide materials are effective catalysts for the total oxidation of methane, with a light-off temperature (T-50%) of similar to 400 degrees C observed for all of the nanostructured materials.

URL<Go to ISI>://WOS:000355891700051
DOI10.1021/acsami.5b02367