Abstract
Hexaaluminogallate/yttria-stabilized zirconia system has been studied for the application of direct Nox reduction system without any reductant gases. The hexaaluminogallate powders prepared by coprecipitation method revealed effective NO oxidation to the activated NOx state in NO/O2. In this study, direct NOx reduction of the hexaaluminogallate/solid oxide electrolytes laminates was investigated.