Polyoxometalated metal-organic framework superstructure for stable water oxidation

Stable non-precious 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 with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80 degrees Celsius and stable operation at 2 amperes per square centimeter for 5,140 hours at room temperature. In-situ electrochemical spectroscopy and theoretical studies revealed 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., , , # Data from: Polyoxometalated metal-organic framework superstructure for stable water oxidation

Dataset DOI: [10.5061/dryad.hqbzkh1t9](10.5061/dryad.hqbzkh1t9)

## Description of the data and file structure

Dataset 1 is the data from Figure 1E: Full-range synchrotron PDF analysis for MOF@POM, with the corresponding Rietveld refinement and the calculated partial PDF patterns of the Ni-Fe distance.This dataset contains the full-range synchrotron PDF analysis of MOF@POM, along with the corresponding Rietveld refinement results and partial PDF patterns from which the Ni–Fe distance was derived. The first three columns (x1, y1, y2) represent the experimental measurements and the fitting results. The fourth and fifth columns (x2, y3) provide the p-PDF data for Ni–Fe. The final two columns (x3, y4) show the residuals between y1 and y2. Both the x- and y-axes are given in units of atomic distance.

Dataset 2 is the data from Figure 2A: CV curves of MOF, MOF@POM, and the reference samples.In t...,