Nitrogen oxide storage material and exhaust gas purification method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNaoto Nagata, Daisuke Shimoyama
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Abstract
An object of the present disclosure is to provide an NOx storage material having sufficient NOx storage capacity even in a low temperature region and a production method thereof. An NOx storage material including a composite oxide of silver and gallium. The composite oxide of silver and gallium is preferably a delafossite-type composite oxide. The composite oxide is produced by dissolving a silver salt and a gallium salt in a solvent and baking the solution, wherein the molar ratio of silver:gallium is preferably from 2:8 to 7:3.
Claims6
An NOx storage material comprising a composite oxide of silver and gallium and an exhaust gas purification device having a catalyst metal downstream of said NOx storage material, wherein the concentration of the composite oxide is 1.7 mmol/g or more and the composite oxide is a delafossite-type composite oxide.
Dependencies are inferred from the claim text.