Low-temperature　selective　catalytic　reduction　(SCR)　of　NO　by　NH3　over　supported　NdV/Ti-x%　(x　=　1,　5,　and　10)　catalysts　has　been　assessed　in　a　microwave　field.　The　NO　conversion　of　NdV/Ti-10%　catalyst　reached　above　85%　in　three　cycles　at　temperatures　ranging　from　120　to　200　°C,　with　a　N2　selectivity　of　ca.　90%.　The　catalysts　before　and　after　activity　evaluation　were　characterized　by　means　of　XRD,　TEM,　H2-TPR,　TPD,　in　situ　DRIFTs　etc.　The　results　suggested　that　the　catalysts　exhibited　excellent　stability　in　the　microwave　field.　It　also　showed　that　catalysts　after　microwave　irradiation　possessed　an　enhanced　formation　of　oxygen　species,　monodentate　nitrite　and　bridging　bidentate　nitrates　on　the　catalysts＇　surface,　which　favored　the　generation　of　gaseous　NO2　to　promote　the　“fast　SCR”　process.　Additionally,　the　results　implied　that　oxygen　species　activation　and　NO　oxidation　to　NO2　over　the　catalyst　were　favored　in　the　microwave　field,　which　facilitated　NH3-SCR　reaction　at　low　temperatures.　©　2024　The　Royal　Society　of　Chemistry.