Boosted surface acidity in TiO2 and Al2O3-TiO2 nanotubes as catalytic supports

- Surface acidity of NTs was modified by adding alumina.
- Brönsted acid sites remain constant but Lewis acid sites are increased remarkably.
- IR characterization by lutidine and pyridine confirms the surface acidity of NTs.
- 98% of NO conversion was reached between 380 and 480 °C on NT-5Al.
- The boosted surface acidity of NT-Al improves the catalytic activity for SCR-NO.