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Effect of Potassium on Sol-Gel Cerium and Lanthanum Oxide
Effect of Potassium on Sol-Gel Cerium and Lanthanum Oxide

... Therefore, the catalysts used in the catalytic combustion of soot must be capable of presenting catalyst activity at low temperatures [10]. An important number of catalytic formulations have been developed in this field, including oxides [11]-[14], perovskites [9] [15]-[17], spinels [18] and metals ...
Kinetics and Mechanism of Uncatalyzed and Ag (I) Catalyzed
Kinetics and Mechanism of Uncatalyzed and Ag (I) Catalyzed

... on the kinetics. An aliquot sample (5 cm3) from the reaction mixture was withdrawn periodically, and was added into dil. H2SO4 (~ 1.0 mol dm3), and Ce(IV) was titrated against the standard solution of ferrous ammonium sulphate using ferroin as an indicator. The kinetics of the reaction was studied u ...
Cerium dioxide
Cerium dioxide

1

Cerium



Cerium is a chemical element with symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named after the Roman goddess of agriculture). Cerium is the most abundant of the rare earth elements, making up about 0.0046% of the Earth's crust by weight. It is found in a number of minerals, the most important being monazite and bastnäsite. Commercial applications of cerium are numerous. They include catalysts, additives to fuel to reduce emissions and to glass and enamels to change their color. Cerium oxide is an important component of glass polishing powders and phosphors used in screens and fluorescent lamps. It is also used in the ""flint"" (actually ferrocerium) of lighters.
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