Making Hydrogen Production Greener with Nickel-Based Anodes

What is it about?

This study explores how nickel-based anodes, fabricated by a straightforward electrodeposition method, can improve the efficiency and durability of anion exchange membrane water electrolysis (AEM-WE) — a promising technology for sustainable hydrogen production. The research investigates how incorporating non-metallic elements such as sulphur (S) and phosphorus (P) and forming nanocone surface structures enhances the catalyst’s activity and long-term stability.

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Photo by Jason Mavrommatis on Unsplash

Photo by Jason Mavrommatis on Unsplash

Why is it important?

Developing non-precious, durable electrodes is key to reducing the cost of green hydrogen. This work demonstrates that simple and scalable electrodeposition can yield highly active nickel-based materials suitable for industrial-scale electrolysers — an important step toward affordable, large-volume hydrogen generation. Key findings: o Ni–S/Ni(OH)₂ anodes showed the highest performance, achieving 2.3 A cm⁻² at 2 V with excellent stability over 10 hours of continuous operation. o The synergistic combination of nickel sulphide and hydroxide layers increases the electrochemically active surface area and promotes the formation of highly active NiOOH species during electrolysis. o Electrodeposition provides a controllable, low-cost, and ionomer-free fabrication route for efficient and durable anodes. o Post-operation analysis revealed lamellar NiOOH structures that stabilise the electrode and sustain its catalytic activity over time. Infographic showing nickel-based nanostructured anodes for oxygen evolution in anion exchange membrane water electrolysis. Infographic created by the authors; background photo by Daniele Levis Pelusi, Unsplash.

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