Tailoring the Composition of BaBO (B = Fe, Mn) Mixed Oxides as CO or Soot Oxidation Catalysts in Simulated GDI Engine Exhaust Conditions.

Mixed oxides with perovskite-type structure (ABO) are promising catalysts for atmospheric pollution control due to their interesting and tunable physicochemical properties. In this work, two series of BaMnO and BaFeO (x = 1 and 0.7) catalysts were synthesized using the sol-gel method adapted to aqueous medium.

Improving the Performance of BaMnO Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis.

A series of BaMnO solids (BM-CX) were prepared by a modified sol-gel method in which a carbon black (VULCAN XC-72R), and different calcination temperatures (600-850 °C) were used. The fresh and used catalysts were characterized by ICP-OES, XRD, XPS, FESEM, TEM, OTPD and H TPR-. The characterization results indicate that the use of low calcination temperatures in the presence of carbon black allows decreasing the sintering effects and achieving some improvements regarding BM reference catalyst: (i) smaller average crystal and particles size, (ii) a slight increase in the BET surface area, (iii) a decrease in the macropores diameter range and, (iv) a lower temperature for the reduction of manganese.

BaFeCuO Perovskites as Active Phase for Diesel (DPF) and Gasoline Particle Filters (GPF).

BaFeCuO perovskites ( = 0, 0.1, 0.3 and 0.