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Scalable synthesis of NiFe-layered double hydroxide for efficient anion exchange membrane electrolysis
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Scalable synthesis of NiFe-layered double hydroxide for efficient anion exchange membrane electrolysis
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Journal Article
Scalable synthesis of NiFe-layered double hydroxide for efficient anion exchange membrane electrolysis
2025
Overview
The alkaline oxygen evolution reaction is a key step in producing green hydrogen through water electrolysis, but its large-scale industrial application remains limited due to challenges with current electrocatalysts—particularly in terms of scalability, efficiency, and long-term stability. Here we show an industrially scalable synthesis of an active NiFe layered double hydroxide (NiFe-LDH) catalyst using a room-temperature, atmospheric-pressure route. The process involves homogeneous alkalinization, where chloride ions nucleophilically attack an epoxide ring, producing a low-dimensional, defect-rich NiFe-LDH with pronounced iron clustering. In-situ spectroscopy and ab-initio calculations reveal that these structural features maximize the conversion of the NiFe-LDH to the catalytic active phase and minimize the energy barrier, improving catalytic efficiency. When used as the anode in an anion exchange membrane water electrolyzer operating at 70 °C, our material delivers 1 A cm⁻² at 1.69 V in a 5 cm
2
full-cell setup, with notable durability compared to conventional NiFe-LDHs. This scalable approach could considerably lower the cost of green hydrogen production by enabling more efficient alkaline electrolyzers.
Green hydrogen production via water electrolysis requires a low-cost solution to provide efficient catalysts. Here, the authors report an industrially scalable method for synthesizing NiFe layered double hydroxide at room temperature and atmospheric pressure, enhancing alkaline electrolysis.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 140/133
/ 140/146
/ 147/135
/ 147/137
/ 147/143
/ Fractals
/ Humanities and Social Sciences
/ Hydrogen
/ Scanning electron microscopy
/ Science
