Surface structure and catalytic performance of Sr-doped La2NiAlO6 double perovskite catalysts for methane combustion
来源期刊：Journal of Rare Earths2015年第12期
论文作者：胡瑞生 白雅琴 杜航宇 张慧敏 杜燕飞 张俊阁 周啟华
文章页码：1284 - 1292
摘 要：A species of novel Sr-doped rare earth double perovskite catalysts(La2-xSrxNiAlO6,x=0,0.1) were prepared by the sol-gel method using citric acid as a complexing agent and calcined at 1100 ℃ for 3 h,then investigated for methane catalytic combustion.The as-prepared catalysts were characterized by X-ray diffraction patterns（XRD）,H2-temperature-programmed reduction（H2-TPR）,specific surface area（BET）,magnetic property measurement technology（M-H）,scanning electron microscopy（SEM）,and X-ray photoelectron spectroscopy（XPS）.Experimental results showed that La1.9Sr0.1NiAlO6 catalyst exhibited significantly improved catalytic activity(T10=378.7 ℃,T90=602.9 ℃) compared with that of La2NiAlO6,whose T10 decreased by 74.4 ℃ and T90 decreased by66.8 ℃,respectively.The excellent catalytic activity of La1.9Sr0.1NiAlO6 caused by Sr-doping could be explained by the larger number of adsorption oxygen on the catalyst surface,which could be proven by XPS analysis.
胡瑞生1，白雅琴2，杜航宇1，张慧敏1，杜燕飞1，张俊阁1，周啟华1
1. School of Chemistry and Chemical Engineering,Key Laboratory of Rare Earth Materials,Inner Mongolia University2. Department of Chemical Engineering,Hohhot Vocational College
摘 要：A species of novel Sr-doped rare earth double perovskite catalysts(La2-xSrxNiAlO6,x=0,0.1) were prepared by the sol-gel method using citric acid as a complexing agent and calcined at 1100 ℃ for 3 h,then investigated for methane catalytic combustion.The as-prepared catalysts were characterized by X-ray diffraction patterns（XRD）,H2-temperature-programmed reduction（H2-TPR）,specific surface area（BET）,magnetic property measurement technology（M-H）,scanning electron microscopy（SEM）,and X-ray photoelectron spectroscopy（XPS）.Experimental results showed that La1.9Sr0.1NiAlO6 catalyst exhibited significantly improved catalytic activity(T10=378.7 ℃,T90=602.9 ℃) compared with that of La2NiAlO6,whose T10 decreased by 74.4 ℃ and T90 decreased by66.8 ℃,respectively.The excellent catalytic activity of La1.9Sr0.1NiAlO6 caused by Sr-doping could be explained by the larger number of adsorption oxygen on the catalyst surface,which could be proven by XPS analysis.
关键词：
