Effectively enhance catalytic performance by adjusting pH during the synthesis of active components over FeVO 4 /TiO 2 –WO 3 –SiO 2 monolith catalysts

•The effect of pH on the structure and performance in the synthesis of FeVO4 was studied.•FeVO4 synthesized at pH=4.5 showed relatively homogeneous nanoparticles.•FeVO4 synthesized at pH=4.5 contained the largest amount of oxygen vacancies.•The surface-enrichment of FeVO4 played a key role in its improved SCR activity.