Effect of A/B-site cation nonstoichiometry on the properties of LaMnO3+δ perovskite for NO oxidation
Introduction Perovskite type mixed oxides may be the potential alternatives to noble metals due to their low cost, high activity and thermal stability ”1”. Compared with stoichiometric LaMnO3, the nonstoichiometric samples exhibit specific chemical composition and structure properties, such as Mn4+/Mn3+ ratio ”2” and active oxygen mobility ”3”. Experimental Series LaxMnO3 (x=0.9, 0.95, 1, 1.05, 1.11) samples were prepared by a citric acid sol-gel method, with metal nitrates as precursor. The samples were characterized by XRD, BET, CO-O2 pulse, TPR, EPR and XPS. Catalytic activity measurements for NO oxidation were carried out in a homemade reactor (d=6 mm; l=36 mm).
Lean Nox Trap NO oxidation Mn4+/Mn3+ ratio Active oxygen Nonstoichiometric LaMnO3+δ perovskite
Jiahao Chen Meiqing Shen Jun Wang Xinquan Wang Zhen Zhao Yugeng Su
Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Enginee
国内会议
南昌
英文
80-81
2011-10-09（万方平台首次上网日期，不代表论文的发表时间）