Effects of impregnation sequence for Mo-modified V-based SCR catalyst on simultaneous Hg(0) oxidation and NO reduction

•Mo-modified V-based SCR catalyst was studied for Hg(0) oxidation and NO reduction.•Hg(0) oxidation performance varied by formulations, impregnation sequence and HCl.•NO reduction performance was insensitive to formulations, sequence and HCl.•Catalyst of Mo + W followed by V showed the best Hg(0) oxidation performance.•Mo + W followed by V showed small Mo grain size and high V(5+)/Mo(6+) content.