A　series　of　perovskite-type　LaCo1-xPtxO3　(x　=　0,　0.05,　0.08,　and　0.10)　were　synthesized　by　the　sol-gel　method　and　well　characterized　by　XRD,　N2　physisorption,　H2-　TPR,　TEM,　and　XPS.　NOx　storage　and　reduction　(NSR)　performances　of　LaCo1-xPtxO3　were　initially　evaluated　using　NO-to-NO2　conversion,　NOx　storage　capacity,　and　NOx　conversion.　The　results　demonstrate　that　NSR　performances　of　Pt-substituted　perovskites　are　higher　than　that　of　LaCoO3,　and　LaCo0.92Pt0.08O3　possesses　the　best　NSR　properties　with　NOx　conversion　of　ca.　90%　at　350　°C.　Moreover,　LaCo0.92Pt0.08O3　exhibits　higher　resistance　to　SO2　poisoning　and　better　regenerability　than　1　wt　%　Pt/16　wt　%　Ba/Al2O3　in　NSR.　No　obvious　deactivation　is　observed　after　LaCo0.92Pt0.08O3　has　been　treated　at　850　°C　for　40　h　and　subjected　to　NOx　reduction　at　350　°C　for　200　h;　the　perovskite　structure　is　well　maintained　in　the　process.　The　addition　of　10　vol　%　H2O　lowers　NOx　conversion　to　about　77%,　but　the　removal　of　water　from　the　reaction　gas　immediately　raises　NOx　conversion　to　90%.　©　2014　American　Chemical　Society.