A Chromium-Substituted Polyoxoniobate with High Ionic Conductivity
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Updated: Jan 27, 2026

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
Published on: May 26, 2019
Zheng-Wei Guo1, Yi Chen1, Dan Zhao2
1College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China.
Abstract:
A rare and novel Cr-substituted polyoxoniobate (PONb), [Cr2.5Nb27.5O66(OH)20(H2O)2]7-, has been synthesized by a combination of hydrothermal and conventional solution methods. The PONb shows an unknown tetrameric structure, which is the largest Cr-containing PONb to date. Interestingly, every two PONb tetramers can be joined together by alkali-metal cations to form a discrete cubelike ionic cluster. The obtained PONb not only enriches the very limited members of the Cr-substituted PONb family but also exhibits high ionic conductivity.
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