Robust Anionic Framework Based on Sodium-Cerium Terephthalate

Synthesis of anionic metal-organic framework Na[Ce(BDC)₂(DMF)₂] based on cerium (III)-sodium terephthalate was performed. The crystal structure, studied by the Rietveld method, consists of anionic [Ce(BDC)₂]^- layers, connected by interlayer sodium cations in a 3D network. Variable-temperature PXRD, total X-ray scattering with pair distribution function analysis, and DFT calculations revealed framework structure stability upon DMF elimination and thermal treatment up to 300 °C. Modification with copper cations was performed using wetness impregnation with a Cu(NO₃)₂ methanol solution to obtain a catalyst for carbon monoxide oxidation. Cu²⁺@Na[Ce(BDC)₂(DMF)₂] in situ decomposition leads to the catalytic activity of the resulting CuO/CeO₂ composite during CO gas oxidation by air.