One-Step Hydrothermal Synthesis of Nanocrystalline Ceria-Zirconia Mixed Oxides: The Beneficial Effect of Sodium Inclusion on Redox Properties


  • We thank Johnson Matthey plc for the provision of a CASE studentship to CSW, Dr. Sarennah Longworth (Johnson Matthey Technology Centre) for the TEM analysis, and Professor S. C. Wimperis (Glasgow) and Dr. N.G. Dowell (Exeter) for access to NMR facilities and assistance with recording some of the NMR spectra. SEA thanks the Royal Society for a Dorothy Hodgkin Research Fellowship. Supporting Information is available online from Wiley InterScience or from the authors.


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Doping of low levels of sodium onto the cation sites of ceria-zirconia mixed oxides allows reduction of the materials to take place at lower temperatures than undoped materials, a desirable property for practical applications in supports for redox catalysis. Synthesis is achieved in a single step under mild hydrothermal conditions directly from aqueous mixtures of metals salts at high pH.