Electroreduction-driven distorted nanotwins activate pure Cu for efficient hydrogen evolution

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Nature Materials, Published online: 03 February 2025; doi:10.1038/s41563-024-02098-2

Low-cost Cu catalysts for the hydrogen evolution reaction (HER) can transform industrial water electrolysis, but pure Cu typically exhibits a negligible HER. Here, combining pulsed laser ablation and subsequent electroreduction, Cu nanotwins form that enable the HER at an overpotential of 301 mV, with 125 h of stable operation at a current density of 500 mA cm−2. 

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