The　Ti-pillared　clay-supported　vanadia-ceria　(yV4Ce/Ti-PILC,　y　was　the　V　weight　percehtage　(wt%),　Ce　weight　percentage　=　4　wt%)　samples　were　prepared　using　the　impregnation　method.　The　catalytic　activity　for　the　selective　catalytic　reduction　of　NOx　with　NH3　(NH3-SCR)　decreased　in　the　order　of　1V4Ce/Ti-PILC　＞4Ce/Ti-PILC　＞　2V4Ce/Ti-PILC　＞　1　V/Ti-PILC　＞1V4Ce/Clay　＞　Ti-PILC　＞　Clay,　with　the　1V4Ce/Ti-PILC　sample　exhibiting　the　best　activity　(NOx　conversion　＞90%　at　280-450　degrees　C).　Physiochemical　properties　of　the　samples　were　investigated　by　means　of　XRD,　N-2　absorption-desorption,　SEM,　H-2-TPR,　NH3-TPD,　XPS,　and　in　situ　DRIFT　techniques.　The　vanadia　was　uniformly　dispersed　on　the　Ti-PILC　support,　while　the　ceria　were　mainly　present　in　CeO2.　The　Ti-pillared　support　was　suitable　for　dispersing　the　V-Ce　composite　oxides.　The　strong　interaction　between　vanadia　and　ceria　led　to　increased　H-2　consumption　and　high　temperature　reduction.　The　Ce4+/Ce3+　and　V5+/V4+　redox　cycle　(V4+　+　Ce4+　＜-＞　V5++　Ce3+)　accounted　for　the　excellent　NH3-SCR　catalytic　performance　of　the　1V4Ce/Ti-PILC　sample.　The　doping　of　a　proper　amount　of　vanadia　could　promote　formation　of　Ce3+　on　the　surface　of　1V4Ce/Ti-PILC,　and　the　formed　Ce3+　could　generate　a　more　amount　of　the　chemisorbed　oxygen　species　that　favored　the　NH3-SCR　reaction.　Furthermore,　the　1V4Ce/Ti-PILC　sample　possessed　high　catalytic　acidity　and　strong　NH3　adsorption　ability,　which　were　responsible　for　high　NO　conversion　in　a　wide　range　of　temperatures.　The　NH3-SCR　reaction　on　the　4Ce/Ti-PILC　and　1V4Ce/Ti-PILC　samples　obeyed　the　Langmuir-Hinshelwood　(L-H)　and　Eley-Rideal　(E-R)　mechanisms,　with　the　former　being　dominant.　(C)　2017　Elsevier　B.V.　All　rights　reserved.