Preferential CO oxidation over CuO[sbnd]CeO2 catalyst synthesized from MOF with nitrogen-containing ligand as precursor

Abstract

A set of highly dispersed copper ceria catalysts were synthesized by using the CeMOF precursor featured rich nitrogen-containing ligand. Owing to the existence of coordination interactions between metal ions and nitrogen atoms, the copper ions could be adsorbed into the pore of Ce-MOF and stabilized by the ordered nitrogen atom on the pore wall. After calcinations, the generated CuO/CeO2 catalyst featured more well-dispersed active sites, which was evidenced by varieties of characterizations such as FT-IR, UV-vis spectroscopy, PXRD, TEM, H2-TPR, Raman spectroscopy and XPS. The as-synthesized CuO/CeO2 catalysts displayed outstanding catalytic activities and stabilities for preferential carbon monoxide oxidation in H2-rich stream.