| abstract |
The present invention provides a hydrotalcite synthesis liquid comprising a transition metal-substituted hydrotalcite-type catalyst for nitrogen oxide occlusion-reduction removal having a transition metal / magnesium molar ratio of 0.2 or less, and a transition metal precursor such that the transition metal / magnesium molar ratio is 0.2 or less. step; Aging step of the synthetic solution; And a hydrothermal treatment step, wherein the transition metal / magnesium molar ratio is 0.2 or less, and relates to a method for preparing a transition metal-substituted hydrotalcite-type catalyst for nitrogen oxide storage-reduction removal.n n n n Hydrotalcite, Nitrogen Oxide |