In-situ preparation of macro/mesoporous NiO/LaNiO3 pervoskite composite with enhanced methane combustion performance

The macro/mesoporous NiO/LaNiO3 composite catalysts were prepared by a combined citric acid combustion and acetic acid (AA) in-situ treatment method. The results show that the NiO/LaNiO3 composite has bigger surface area and enhanced methane catalytic oxidation performance than LaNiO3 obtained only by a citric acid combustion method. Besides the bigger surface area, the enhanced catalytic performance is mainly attributed to the formation of more NiO particles on the surface of catalysts, which is helpful to activate the CH bond.