Journal
RSC ADVANCES
Volume 3, Issue 41, Pages 18878-18885Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra43742f
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Funding
- Natural Science Foundation of China [20906099, 50976116]
- Ministry of Science and Technology of the People's Republic of China [2009BWZ003]
- Chinese Academy of Sciences [XDA05010109, XDA05010110, XDA05010204]
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Thermochemical CO2 splitting was carried out over Ni-, Fe-, Mg- and Mn-doped ceria/zirconia solid solutions, where the sample was thermally reduced at 1400 degrees C under inert atmosphere followed by the re-oxidization of CO2 to generate CO at 1100 degrees C in the subsequent step. Compared with the undoped sample, all the doped ceria/zirconia had a high reduction yield in the first thermal reduction step. Due to the low thermal stability, Ni-, Fe- and Mn-doped samples showed lower CO production in the CO2 splitting step than the stoichiometric amounts. In contrast, the Mg-doped sample produced more CO with the volumes of 5.64 and 5.17 mL g(-1) during the two thermochemical cycles. Moreover, a 10% Mg-doped sample prepared via hydrothermal treatment with P123 showed a more stable reactivity during cycling due to the relatively stable microstructure under the successive high temperature thermal treatment.
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