title: Controllable Assembly of Hierarchical Macroporous-Mesoporous LnFeO₃ and Their Catalytic Performance in the CO + NO Reaction.
abstract: A new synthesis strategy to prepare hierarchical macroporous-mesoporous materials employing poly(ethylene oxide)-poly(phenylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) as a single template and an acid adjusting agent was reported. There is a hierarchical structure including macropores with a size of 50-100 nm and mesopores in the macroporous walls with a size of 3-5 nm. The macroporous walls are composed of rare earth orthoferrite nanoparticles with a size of 5-10 nm. These hierarchically porous materials show high catalytic activities for the CO + NO reaction, and NO can be fully converted to N2 at temperatures as low as 350 °C, indicating their potential in the catalytic conversion of automotive exhaust gas and other catalysis-related fields. This synthesis strategy is a facile method for the preparation of hierarchical porous materials and may give us a guideline for the synthesis of functional materials with further catalytic applications.
authors.affiliation: ‡Institute of New Energy, China University of Petroleum-Beijing, Beijing 102249, China.
authors.forename: Zhen-Xing
authors.initials: ZX
authors.lastname: Li
authors.forename: Fu-Bo
authors.initials: FB
authors.lastname: Shi
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Yan