Facile Synthesis and Characterization of Nanostructured Transition Metal/Ceria Solid Solutions (TMxCe1-xO2-delta, TM = Mn, Ni, Co, or Fe) for CO Oxidation
Cited 0 times inCited 0 times in
- Facile Synthesis and Characterization of Nanostructured Transition Metal/Ceria Solid Solutions (TMxCe1-xO2-delta, TM = Mn, Ni, Co, or Fe) for CO Oxidation
- Lee, Kyung Joo; Kim, Yongseon; Lee, Jae Hwa; Cho, Sung June; Kwak, Ja Hun; Moon, Hoi Ri
- Issue Date
- AMER CHEMICAL SOC
- CHEMISTRY OF MATERIALS, v.29, no.7, pp.2874 - 2882
- We developed a general synthetic route for preparing nanoporous transition metal/ceria solid solutions with nanocrystalline frameworks (TMxCe1-xO2-delta, TM = Mn, Ni, Co, or Fe). Their structural properties were characterized using transmission electron microscopy (TEM), X-ray powder diffraction (XRPD), and N-2 sorption. Through thermolysis of bimetallic coordination polymers, hierarchically nanoporous frameworks composed of 3-4 nm TMxCe1-xO2-delta solid solution nano crystals in which the transition metal ions are well dispersed in the ceria lattice as evidenced by the Rietveld refinement of the XRPD patterns were synthesized. The electronic properties of the MnxCe1-xO2-delta solid solutions at up to 20 mol % were examined by Raman spectroscopy and Xray photoelectron spectroscopy analysis, and H-2-temperature-programmed reduction results demonstrated the altered physicochemical properties, e.g., hydrogen reduction behaviors, due to the doping. CO oxidation studies of MnxCe1-xO2-delta reveal that the Mn species are responsible for increasing the catalytic activity by an order of magnitude compared to that of pure ceria, by creating nanostructures with accessible pores and active sites on the inner surface. This facile synthetic approach can create nanoporous solid solutions with nanocrystalline frameworks and devise structures and compositions. Therefore, our approach opens new avenues for developing multimetallic catalyst systems.
- ; Go to Link
Appears in Collections:
- SNS_Journal Papers
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.