Cerium oxide-zirconium oxide-based mixed oxide and method for producing thereof
A mixed oxide, zirconia-based technology, applied in zirconium compounds, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of no OSC and platinum dispersibility, and achieve the effect of excellent platinum dispersibility
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[0102] 280g of 20% cerium nitrate solution (CeO 2 The equivalent is containing 56g) heated to 85°C, then added 624g of 25% sodium sulfate solution (Na 2 SO 4 The equivalent weight is 156 g), and it was maintained at 85° C. for 1 hour to obtain a slurry containing cerium sulfate-sodium mixed salt.
[0103] 110g of 20% zirconium nitrate solution (ZrO 2 Equivalent is containing 22g) and 110g 20% cerium nitrate solution (CeO 2 Equivalent is to contain 22g) to join in this alkaline slurry containing cerium sulfate-sodium mixed salt.
[0104] The solution was then neutralized with 500 g of 25% sodium hydroxide. The pH at this point is 12 or higher.
[0105] Continuing, the hydroxide is obtained by filtering and rinsing with water.
[0106] The obtained hydroxide was then fired at 650° C. in air for 5 hours to obtain the oxide.
[0107] The X-ray diffraction results of the obtained oxides are shown in figure 1 .
[0108] In addition, the specific surface area of the oxid...
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