The promotional role of Ni in FeVO4/TiO2 monolith catalyst for selective catalytic reduction of NO with NH3

The promotional effect of nickel additive on the catalytic performance of the representative FeVO 4 /TiO 2 for NH 3 -SCR reaction is systematically studied for the first time in the present work. The experimental results showed that NO x conversion at low temperature and N 2 selectivity could be significantly improved by Ni doping and 0.4Ni-FeV-Ti exhibited the highest NO x removal efficiency. Analysis by XRD, SEM/HR-TEM, Raman, TPD, DRIFTS, TPR and XPS showed that nickel doping effectively promoted the interaction of FeVO 4 nanoparticles with TiO 2 , consequently resulting in an enhanced acidity property, improved redox activity and giving rise to the formation of the surface oxygen vacancies and defect sites.