Alumina-carbon　nanotube　(Al2O3-CNT)　supports　were　prepared　by　the　decomposition　of　acetylene　on　Al2O3.　The　subsequent　impregnation　of　Pt　and　Ba　yielded　Pt/Ba/Al2O3-CNT.　Pt/Ba/Al2O3-CNT　was　characterized　by　X-ray　diffraction,　scanning　and　transmission　electron　microscopies,　N-2　physisorption,　X-ray　photoelectron　spectroscopy,　and　in-situ　diffuse　reflectance　infrared　Fourier　transform　spectroscopy　(DRIFTS).　The　relationship　between　the　structure　and　properties　of　Pt/Ba/Al2O3-CNT　was　investigated.　Pt/Ba/Al2O3-CNT　exhibited　much　higher　resistance　to　SO2　poisoning　and　better　regeneration　ability　than　Pt/Ba/Al2O3,　during　NOx　reduction　in　the　presence　of　SO2.　In-situ　DRIFTS　spectra　suggested　that　SO2　had　no　effect　on　the　NOx　storage　and　reduction　process.　(C)　2013,　Dalian　Institute　of　Chemical　Physics,　Chinese　Academy　of　Sciences.　Published　by　Elsevier　B.V.　All　rights　reserved.