# Polyoxometalated metal-organic framework superstructure for stable water oxidation

“Polyoxometalated metal-organic framework superstructure for stable water oxidation” (2025), by Kaihang Yue et al. Energy research paper. Original abstract below, unchanged. No free PDF was found.

- Authors: Kaihang Yue, Ruihu Lu, Mingbin Gao, Fei Song, Yao Dai, Chenfeng Xia, Bingbao Mei, Hongliang Dong, Ruijuan Qi, Daliang Zhang et al.
- Published: April 24, 2025
- Field: Energy
- DOI: https://doi.org/10.1126/science.ads1466
- Source: https://doi.org/10.1126/science.ads1466

## Abstract

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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