Nano-Pero vskites of LaFe(۱.۰, ۱.۲, ۱.۵ or ۱.۷)O(۳+į) as Catalyst of C O and U HC

The c atalytic converter is used for purification of automotive exhaust gas (unburned hydrocarbons (UHC), carbon monoxid e (CO) and nitrogen oxides (NOX)). Lantha num-transition metal p erovskites (LaBO۳) are proved to be effectiv e catalysts for the catalytic oxidation of hydrocarbons, CO and ammonia. They are also considered to be prom ising materials for application as e lectrode ma terials in so lid oxide fu el cells. LaF eO۳ is well-none LaBO۳ perovskit e oxide which consists of FeO۶ octahedra units with La۳+ ions in serted between these uni ts [۱-۳]. Based on the target applic ations, diff erent synthesis methods have been used as alte rnative for solid state reactions and mechanical chemical solid reaction, including copreci pitation, com bustion, sol–gel, sonochemical and thermal decomposition . The samples were characterized by FT-IR, XR D and UV-Vis spectrometry. In our case crystallite size o f the samples was calculated to be in range of ۳۷ -۴۵ nm usin g XRD dat a.

کلیدواژه ها:

perovskite ، Excess Iron ، Exhaust Gas ، XR D ، Citric acid.