The　undoped　and　rare　earth　oxide　(REOx,　RE　=　La,　Ce,　Pr,　Sm)-doped　acid-treated　sepiolite　(H-Sep)-supported　copper　oxide　catalysts　(Cu/H-Sep　and　RE-Cu/H-Sep:　Cu　and　RE　loading　=　15　and　4　wt%,　respectively)　were　prepared　using　the　incipient　wetness　impregnation　method.　The　catalysts　were　characterized　by　means　of　the　XRD,　BET,　XPS,　H-2-TPR　and　NH3-TPD　techniques,　and　their　catalytic　activities　were　evaluated　for　the　selective　catalytic　reduction　(SCR)　of　NO　with　propylene.　It　is　shown　that　the　doping　of　REOx　led　to　an　enhancement　in　catalytic　performance　of　Cu/H-Sep　in　the　SCR　of　NO　with　C3H6.　Among　the　RE-Cu/H-Sep　catalysts,　Ce-Cu/H-Sep　performed　the　best,　with　62%　NO　conversion　being　achieved　at　350　degrees　C　in　the　(NO　+　C3H6　+　O-2)　reaction.　We　believe　that　the　high　catalytic　performance　of　Ce-Cu/H-Sep　for　the　SCR　of　NO　with　C3H6　was　associated　with　the　good　low-temperature　reducibility,　high　copper　oxide　dispersion,　and　strong　metal-support　interaction.　(c)　2012　Elsevier　B.V.　All　rights　reserved.