Novel PtCuO/CeO2/α-Al2O3 sponge catalysts for the preferential oxidation of CO (PROX) prepared by means of supercritical fluid reactive deposition (SFRD)

► Novel preparation route (SFRD). ► Pt/CuO/CeO2-catalyst supported on α-alumina sponges. ► Nanoscale copper in ceria layer.