A novel Dawson-like cerium(IV)-hybridizing selenotungstate Na13H7[Ce(SeW17O59)2]·31H2O

•The Dawson-like polyoxometalate•The Dawson-like cerium(IV)-hybridizing selenotungstate•Dawson-like lanthanide-hybridizing selenotungstate•Electrochemical properties

A novel cerium(IV)-hybridizing selenotungstate with Dawson-like structure Na13H7[Ce(SeW17O59)2]·31H2O (1) has been synthesized by reaction of Na2WO4·2H2O, Na2SeO3 and (NH4)2Ce(NO3)6 in the aqueous solution and characterized by elemental analysis, IR spectrum, UV spectrum, thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. To the best of our knowledge, 1 stands for 1:2-type Dawson-like selenotungstate constructed from two identical [SeW17O59]12 − moieties combined via one Ce4 + ion. The Ce4 + cation displays a distorted square prismatic geometry defined by eight oxygen atoms from two [SeW17O59]12 − moieties. In the [Ce(SeW17O59)2]20 − polyoxoanion, the {SeO3} trigonal pyramid encapsulated into the [SeW17O59]12 − fragment is situated on the side close to the Ce4 + ion. The TGA curve of 1 reveals two steps of weight loss between 25 °C and 700 °C. Furthermore, the electrochemical and the electrocatalytic properties of 1 have been measured by cyclic voltammetry (CV) in 0.5 M Na2SO4 + H2SO4 aqueous solution.

Graphical abstractA novel Dawson-like cerium(IV)-hybridizing selenotungstate Na13H7[Ce(SeW17O59)2]·31H2O (1) has been synthesized and characterized.Figure optionsDownload full-size imageDownload as PowerPoint slide