Highly dispersed metal supported oxide as nh3-scr catalyst and synthesis processes

A method comprising using a catalyst material as an ammonia selective catalytic reduction (NH3-SCR) catalyst for nitrogen oxides (NOx) reduction, wherein said catalyst material being prepared by a process comprising the steps of:

• (a) providing a support material having surface hydroxyl (OH) groups, wherein the support material is ceria (CeO2), zirconia (ZrO2) or a combination thereof, and wherein the support material contains at least 0.3 mmol and at most 2.0 mmol OH groups/g of the support material;
• (b) reacting the support material having surface hydroxyl (OH) groups of step (a) with at least one of the following:
• (b1) a compound containing at least one alkoxy or phenoxy group bound though its oxygen atom to a metal element from Group 5 (V, Nb, Ta) or Group 6 (Cr, Mo, W);
• (b2) a compound containing at least one hydrocarbon group bound though a carbon atom to a metal element from Group 5 (V, Nb, Ta) or Group 6 (Cr, Mo, W);
• (b3) a compound containing at least one hydrocarbon group bound though a carbon atom to a metal element which is copper (Cu);
• and
• (c) calcining the product obtained in step (b) in order to provide a catalyst material in which a metal element from Group 5 or Group 6, or Cu, is present as an oxide on the support material.