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Updated: Jun 28, 2026
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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Pure reduced polyoxometalate materials as electroactive materials for assembling proton energy storage devices
Chen Wang1, Wen-Hang Guo2, Wen Tang1
1School of Chemistry and Chemical Engineering, Key Laboratory of Inorganic Functional Materials, Huangshan University, Huangshan 245042, P. R. China. zhaopengqi@hsu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|June 26, 2026
Summary
Novel pyridine-decorated polyoxometalates demonstrate efficient proton transport and redox activity. These materials enable high-performance solid-state proton energy storage devices with enhanced capacitance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Inorganic Chemistry
Background:
- Integrating efficient proton transport and reversible redox activity in single materials is crucial for advanced electrochemical devices but remains challenging.
- Polyoxometalates (POMs) are versatile inorganic clusters with tunable redox properties, but their proton conductivity often requires improvement.
Purpose of the Study:
- To design and synthesize novel pyridine-decorated polyoxometalates with combined proton conductivity and redox activity.
- To evaluate the proton conductivity and electrochemical performance of these new materials for energy storage applications.
Main Methods:
- Hydrothermal synthesis of two crystalline pyridine-decorated polyoxometalates: H10{CuII0.5[MoV6O12(OH)3(HPO4)4]2}2·8HPy·24H2O (1) and H8CdII[MoV6O12(OH)3(HPO4)4]2·2Cl·2HPy·2Me2NH (2).
- Proton conductivity measurements under varying temperature and relative humidity (RH).
- Fabrication and electrochemical characterization of solid-state proton energy storage devices using the synthesized materials on carbon paper (e.g., 1-CP@PANI-SC).
Main Results:
- The synthesized materials exhibited significant proton conductivity, reaching 9.63 × 10^-3 S cm^-1 (1) and 2.21 × 10^-3 S cm^-1 (2) at 85 °C and 95% RH, attributed to ordered hydrogen-bonding networks.
- The 1-CP@PANI-SC devices demonstrated high specific capacitance (330.12 F g^-1) and excellent cycling stability (94.2% after 1000 cycles).
- Electrochemical analysis confirmed that proton-conducting pathways facilitate charge-compensating proton transport during molybdenum redox reactions, enhancing electrochemical efficiency.
Conclusions:
- The developed pyridine-decorated polyoxometalates are high-performance multifunctional electroactive materials.
- The study establishes a material design principle linking proton conduction with charge storage dynamics for next-generation energy storage systems.
- These materials offer a promising platform for developing advanced solid-state electrochemical devices.
