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Updated: Sep 14, 2025

High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
Crown-type tetranuclear Ag-POM exhibits excellent proton conductivity performance
Yahao Sun1, Minzhen Cai1, Pengtao Ma1
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China. jpwang@henu.edu.cn.
None:
A crown-type tetranuclear Ag-POM, Na24[Ag3.4Na0.6(As4W40O140)]·82H2O (1), was synthesized based on the structural features of {As4W40} using simple materials through the hydrothermal method. The polyanion of compound 1 consists of a tetranuclear silver cluster embedded in the cyclic ligand {As4W40} and the polyanions linked by Na+ to form a 3D framework. Moreover, compound 1 exhibits excellent proton conductivity, with an optimal conductivity of 2.24 × 10-2 S cm-1 at 90% RH, 358 K. Furthermore, it demonstrates outstanding cycling stability during heating-cooling cycles and durability over 68 h.
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