Surface structure and catalytic performance of Sr-doped LaeNiAIO6 double perovskite catalysts for methane combustion

A species of novel St-doped rare earth double perovskite catalysts （La2 xSrxNiA106, 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 b...

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Published in中国稀土学报：英文版 Vol. 33; no. 12; pp. 1284 - 1292
Main Author 胡瑞生 白雅琴 杜航宇 张慧敏 杜燕飞 张俊阁 周啟华
Format Journal Article
LanguageEnglish
Published 2015
Subjects
X射线光电子能谱
催化性能
扫描电子显微镜
甲烷燃烧
稀土掺杂
表面结构
钙钛矿型催化剂
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ISSN1002-0721
2509-4963

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Summary:A species of novel St-doped rare earth double perovskite catalysts （La2 xSrxNiA106, 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 Lal.9Sr0.1NiA106 catalyst exhibited significantly improved catalytic activity （T10=378.7 ℃, T90=602.9 ℃） compared with that of La2NiAIO6, whose T10 decreased by 74.4 ℃ and T90 decreased by 66.8 ℃, respectively. The excellent catalytic activity of Lal.9Sr0.tNiA106 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.
Bibliography:11-2788/TF
A species of novel St-doped rare earth double perovskite catalysts （La2 xSrxNiA106, 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 Lal.9Sr0.1NiA106 catalyst exhibited significantly improved catalytic activity （T10=378.7 ℃, T90=602.9 ℃） compared with that of La2NiAIO6, whose T10 decreased by 74.4 ℃ and T90 decreased by 66.8 ℃, respectively. The excellent catalytic activity of Lal.9Sr0.tNiA106 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.
rare earths; double perovskite; methane catalytic combustion; sol-gel method
ISSN:1002-0721
2509-4963