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Lanthanum cobalt oxide oxidation catalysts derived from mixed hydroxide precursors

1990; Elsevier BV; Volume: 125; Issue: 2 Linguagem: Inglês

10.1016/0021-9517(90)90302-z

1090-2694

Keith R. Barnard,

Mesoporous Materials and Catalysis

Simultaneous oxidation/co-precipitation of an equimolar mixture of La(III) and Co(II) nitrates afforded a hydroxide-containing gel, which was converted to LaCoO3 on calcination at 600°C. A material with surface area in excess of 40 m2/g has been produced, provided the hydroxide gel was washed with a nonaqueous solvent before dehydration. The resultant LaCoO3 perovskite sintered readily on heating above 700°C. Rates for oxidation for CO and propane showed a linear dependence upon the surface area of LaCoO3 in the temperature range RT to 600°C.