Effect of Copper Substitution and Preparation Methods on the LaMnO3 Structure and Catalysis of Methane Combustion and CO Oxidation

催化学报 ›› 2010, Vol. 31 ›› Issue (4): 394-403.

Effect of Copper Substitution and Preparation Methods on the LaMnO3 Structure and Catalysis of Methane Combustion and CO Oxidation

Maryam ABDOLRAHMANI, Matin PARVARI*, Mehdi HABIBPOOR

School of Chemical Engineering, Iran University of Science and Technology, Tehran, Iran

收稿日期:2010-04-25 出版日期:2010-04-25 发布日期:2013-10-08

Effect of Copper Substitution and Preparation Methods on the LaMnO3∮ Structure and Catalysis of Methane Combustion and CO Oxidation

Maryam ABDOLRAHMANI, Matin PARVARI*, Mehdi HABIBPOOR

School of Chemical Engineering, Iran University of Science and Technology, Tehran, Iran

Received:2010-04-25 Online:2010-04-25 Published:2013-10-08

摘要/Abstract

摘要： LaMn1-xCuxO3刡冊 perovskite oxides (x = 0, 0.2, 0.4, 0.6, 0.8, 1) were prepared by two different methods, the Pechini and sol-gel methods. The catalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray fluorescence spectroscopy, N2 adsorption, and temperature-programmed reduction. Their catalytic activity in the oxidation of methane and CO was evaluated. EDS and SEM results showed that the Pechini samples had more homogeneity and smaller particles (higher specific surface area). The catalytic activity for methane combustion was highest for x = 0.2. In CO oxidation, the oxides with x = 0.2 and x = 0.4 were the most active. The Pechini samples had higher activity and stability than the sol-gel samples.

关键词: perovskite, Pechini, sol-gel, methane combustion, carbon monoxide oxidation

Abstract: LaMn1-xCuxO3∮d perovskite oxides (x = 01) prepared by the Pechini method show higher surface area and thus higher activity and stability in CO oxidation and CH4 combustion than that by the sol-gel method.

Key words: perovskite, Pechini, sol-gel, methane combustion, carbon monoxide oxidation

Maryam ABDOLRAHMANI;Matin PARVARI*;Mehdi HABIBPOOR. Effect of Copper Substitution and Preparation Methods on the LaMnO3 Structure and Catalysis of Methane Combustion and CO Oxidation[J]. 催化学报, 2010, 31(4): 394-403.

Maryam ABDOLRAHMANI;Matin PARVARI*;Mehdi HABIBPOOR. Effect of Copper Substitution and Preparation Methods on the LaMnO3∮ Structure and Catalysis of Methane Combustion and CO Oxidation[J]. Chinese Journal of Catalysis, 2010, 31(4): 394-403.

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Effect of Copper Substitution and Preparation Methods on the LaMnO3 Structure and Catalysis of Methane Combustion and CO Oxidation

Effect of Copper Substitution and Preparation Methods on the LaMnO3∮ Structure and Catalysis of Methane Combustion and CO Oxidation

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