Robust Anionic Framework Based on Sodium–Cerium Terephthalate

TL;DR

This paper describes the synthesis and characterization of a stable anionic metal-organic framework and its use as a catalyst for carbon monoxide oxidation.

Contribution

The novel anionic framework Na[Ce(BDC)2(DMF)2] and its application as a catalyst for CO oxidation are introduced.

Findings

The framework remains stable after DMF elimination and thermal treatment up to 300 °C.

Copper-modified framework shows catalytic activity for CO oxidation when decomposed into CuO/CeO2.

The structure was confirmed using PXRD, X-ray scattering, and DFT calculations.

Abstract

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.

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