A cyclic extrusion strategy for solvent-free synthesis of mesoporous aluminum-based metal oxide catalysts

Abstract

Aluminum-based materials are an class of important solid catalysts and mechanochemical synthesis is crucial for reducing pollution and improving synthesis efficiency. Herein, we used a cyclic extrusion method to one-step synthesize a series of mesoporous alumina-based metal oxides under solvent-free conditions. The synthesized binary, ternary, and high entropy metal oxides are all mesoporous materials with high specific surface areas (200–400 m2/g). Various characterization methods are applied to illustrate the contribution of synthesis method on the pore structure, phase formation, and metal distribution. The application of alumina-based nickel catalysts with various Ni loadings in methane dry reforming reaction shows good catalytic activity and stability (100 h). The effect of Ni loadings on the coke formation is studied, and the results indicate that low nickel-loading samples show better resistance to coking.