Mg/Zn/Al/Fe mixed oxides derived from hydrotalcites synthesized by the coprecipitation method were found to be effective catalysts for the NO storage/reduction (NSR) process. The activity of this material was improved by the addition of a basic metal as potassium and by the incorporation of a metal with significant redox properties as Pd. It seems that palladium favored the NOx oxidation to NO2 whilst potassium increased the surface basicity of the catalyst, both improving the NOx storage. This catalyst was hydrothermally stable and showed a similar activity to that obtained with a catalyst derived from Mg/Co/Al hydrotalcites but without the environmental problems related with the use of cobalt. (C) 2013 Elsevier B.V. All rights reserved.