Preparation of core-shell Ni/CeO2@Al2O3 catalyst for selective hydrogenation of acetylene

Abstract

Lattice strain and ligand effects of core-shell structure regulate the geometric and electronic properties of the active metal on the surface of catalysts. Herein, a core-shell Ni/CeO₂@Al₂O₃ catalyst was prepared by hydrothermal deposition for selective hydrogenation of acetylene. Compared with the general Ni/Al₂O₃ catalyst, the ethylene selectivity of the Ni/CeO₂@Al₂O₃ catalyst was significantly improved due to the special structure reduced the adsorption strength of ethylene. Under the condition of 10% CeO₂ loading, the performance of the catalyst was the best (85.3% C₂H₂ conversion and 81.2% C₂H₄ selectivity). This work provided a new approach for exploring efficient catalysts for semi‑hydrogenation reaction.