The deposition of VWO x on the CuCeO y microflower for the selective catalytic reduction of NO x with NH 3 at low temperatures.

•A new carrier, CuCeOy microflower, was developed to load VWOx for the SCR de-NOx.•The VWOx/CuCeOy exhibited obviously enhanced low-temperature de-NOx performance.•The transfer of electrons among Ce, Cu and V ions in VWOx/CuCeOy was easy to occur.•The apparent activation energy of SCR de-NOx reaction was decreased to 16.59 kJ/mol.•Both E-R and L-H mechanisms were included in the SCR de-NOx over the VWOx/CuCeOy.