Alkaline Compound Promote Perovskite Oxide Catalytic Decomposition Of Nitric Oxide (class)

Nitric oxide (NO) is a serious pollutant in earth,s atmosphere,it is harmful gas both to environment and human body. Therefore, the elimination of NO has a very important practical significance.Composite oxides can eliminate NOx and keep structural stability, modulate the bites of A and B.It has attracted many researchers a great deal of attention. The study found that BaCO3 exist in mixed oxides La2-xBaxNiO4 ,the catalytic La2-xBaxNiO4 showed excellent NO decomposition, the reason is that alkaline BaCO3 can deposit NOx especially NO2. BaO is More alkaline than BaCO3,so it is more perfect for NOx storage and more helpful for the improvement of NO decomposition over perovskite-like oxides.Therefore, the work of the paper is to study the effect of BaO and BaCO3 for NO decomposition over perovskite-like oxides.In this paper, BaCO3 and BaO are studied for eliminating the decomposition of NO on compositeoxides.Investigated different amounts of BaCO3 and BaO mixed with La1.6Ba0.4NiO4 for NO decomposition; BaCO3 and BaO replaced on A bit different from the same base type mixed oxides La0.8M0.2BO3 (M = Mg, Ca, Sr; B = Fe, Co , Mn) and La1.6M0.4BO4 (M=Mg, Ca, Sr; B=Cu, Ni) for NO decomposition and A bit of a different base to replace the same type complex oxides La0.8M0.2BO3 (M = Mg, Ca, Sr; B = Fe, Co, Mn) and La1.6M0.4BO4 (M=Mg, Ca, Sr; B=Cu, Ni) for NO decomposition. BaCO3 and BaO was found to increase composite oxides catalytic activity of NO, with the best BaO. BaO can cause the yield of N2 about 65% over La1.6Ba0.4NiO4 for the decomposition of NO and maintain 500h at 923K, other perovskite-like oxides reach the same N2 yield at 1123 K.So BaO can low the reaction temperature for NO decomposition over perovskite-like oxides,it is possible for the application of perovskite-like oxides for NO decomposition at lower temperature. Through X-ray diffraction (XRD), temperature-programmed desorption of oxygen (O2-TPD), temperature-programmed desorption of nitric oxide (NO-TPD) and hydrogen temperature-programmed reduction (H2-TPR) etal to correlate and explain their activity for NO removal after BaCO3 and BaO mixed with composite oxides.