Novel NO Trapping Catalysts Derived from Co−Mg/X−Al (X = Fe, Mn, Zr, La) Hydrotalcite-like Compounds

Co2.5Mg0.5/Al1 and Co2.5Mg0.5/X0.5Al0.5 hydrotalcite-like compounds (where X = Fe, Mn, Zr, La) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 °C for 4 h in static air are mainly of spinel phase, with a surface area of 14.2−23.8 m2/g,...

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