Science

A perfect couple: Chromium keeps ruthenium grounded in water electrolysis

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Briefings

Researchers at ICFO discovered that ruthenium, a material used in single-atom catalysts for water electrolysis, remains stable in water despite its tendency to over-oxidize and dissolve. This stability is attributed to its chemical interactions with chromium, which acts as a stabilizing agent. The study highlights how specific atomic pairings can mitigate material degradation in energy conversion technologies.

Key points

• Ruthenium is classified as a 'dreamer' material that tends to over-oxidize and dissolve during water electrolysis operations.
• Chromium acts as a stabilizing agent that prevents ruthenium from dissolving, allowing the pair to function effectively as a catalyst.

Context

This research from ICFO addresses critical challenges in green hydrogen production, where catalyst stability is essential for long-term efficiency. Understanding atomic pairings helps engineers design more durable catalysts for sustainable energy systems.

Limitations

The study focuses on specific atomic interactions between ruthenium and chromium in water electrolysis. It does not provide data on long-term durability beyond the experimental timeframe, nor does it address scalability or economic feasibility for industrial applications.

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