Charge-engineered Pt for sustained hydrogen generation and high-purity Mg(OH)₂ co-production in direct seawater electrolysis

Abstract

The teams of Lu and Tian reported a halide ion modification strategy that endows a Pt cathode with strong anti-scaling capability while sustaining an efficient hydrogen evolution reaction during direct seawater electrolysis. The surface-bound halide ligand optimizes *H adsorption on adjacent Pt sites to boost Heyrovsky step and repels interfacial OH⁻ to shift the local pH maximum into the bulk electrolyte. These combined effects drive continuous hydrogen generation and high-purity Mg(OH)₂ precipitation without observable decay in a long-term stability measurement at 100 mA cm⁻² in direct seawater electrolysis.

Graphical abstract

Keywords

natural seawater electrolysis / hydrogen evolution reaction / anti-scaling / activity / stability

References

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