Studies on catalytic and structural properties of BaRuO3 type perovskite material for diesel soot oxidation

• BaRuO3 can be easily synthesized and shows high catalytic activity for soot oxidation.
• Carbon/soot oxidation temperature was lowered by >190 °C.
• 120 planes of BaRuO3 have abundant Ru atoms, which can facilitate the oxygen dissociation.
• BaRuO3 shows high thermal stability and can be used for high temperature catalytic applications.

BaRuO3 based perovskite type catalytic material was synthesized by co-precipitation method and its catalytic activity has been tested for diesel soot oxidation. This material shows high catalytic activity for carbon/soot oxidation reaction with lowering of carbon oxidation temperature by >190 °C. The catalytic activity could be due to dissociative adsorption of oxygen on BaRuO3 surface. It is postulated by structural investigations that 120 planes of BaRuO3 can have abundant Ru atoms which can facilitate the oxygen dissociation. The additional advantage of using Ru in BaRuO3 is the thermal stability of Ru in oxide matrix as well as basicity offered by Ba. These synergetic effects can also be responsible for the high soot/carbon oxidation activity of this perovskite type material, which can be a potential candidate for control of soot emissions from combustion processes and vehicle exhaust.