FIELD: chemistry.
SUBSTANCE: invention relates to material, accumulating NOx, able to effectively accumulate nitrogen oxides (NOx) in the low temperature region, and to the exhaust gas purification method using the NOx accumulating material. NOx accumulating material contains complex oxide of silver and gallium. Complex silver and gallium oxide is preferably a composite oxide of the delafossite type. Complex oxide is obtained by dissolving silver salt and gallium salt in solvent and hot drying of solution, wherein molar ratio of silver to gallium is preferably from 2:8 to 7:3.
EFFECT: invention provides high accumulation capacity of NOx in the low temperature region, in particular at low temperature of 200 °C or less.
8 cl, 2 tbl, 13 dwg
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