Surface structure and catalytic performance of Sr-doped La2NiAlO6 double perovskite catalysts for methane combustion

被引：25

作者：

Hu Ruisheng ^{[1
]}

Bai Yaqin ^{[2
]}

Du Hangyu ^{[1
]}

Zhang Huimin ^{[1
]}

Du Yanfei ^{[1
]}

Zhang Junge ^{[1
]}

Zhou Qihua ^{[1
]}

机构：

[1] Inner Mongolia Univ, Sch Chem & Chem Engn, Key Lab Rare Earth Mat, Hohhot 010021, Peoples R China

[2] Hohhot Vocat Coll, Dept Chem Engn, Hohhot 010051, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2015年 / 33卷 / 12期

基金：

中国国家自然科学基金;

关键词：

rare earths; double perovskite; methane catalytic combustion; sol-gel method; TRANSITION-METAL PEROVSKITES; CARBON-MONOXIDE OXIDATION; LOW-TEMPERATURE; CO; OXIDES; OXYGEN; MN; ALUMINA; LAMNO3; CH4;

D O I：

10.1016/S1002-0721(14)60558-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

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 degrees C for 3 h, then investigated for methane catalytic combustion. The as-prepared catalysts were characterized by X-ray diffraction patterns (XRD), H-2-temperature-programmed reduction (H-2-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 (T-10=378.7 degrees C, T-90=602.9 degrees C) compared with that of La2NiAlO6, whose T-10 decreased by 74.4 degrees C and T-90 decreased by 66.8 degrees C, 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.

引用

页码：1284 / 1292

页数：9

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