Relationship between structure and performance of a novel cerium-niobium binary oxide catalyst for selective catalytic reduction of NO with NH3

- The CexNby catalysts showed excellent SCR activity and N2 selectivity.
- NbOH and NbO bonds acted as Brønsted and Lewis acid sites, respectively.
- Surface adsorbed oxygen played a key role for the SCR activity at low temperatures.
- The abundant surface adsorbed oxygen might come from the activation effect of niobia.