A new chiseling technique creates a "three-level" metal architecture that reduces the need for expensive platinum in hydrogen production by 97%.
April 26, 2026
Original Paper
Three-level hierarchically structured metallic-glass electrodes fabricated via elliptical vibration chiseling enable ultralow-Pt acidic hydrogen evolution
SSRN · 6642486
The Takeaway
Platinum is the gold standard for making hydrogen fuel, but it is too expensive for large-scale use. This paper introduces elliptical vibration chiseling to carve a complex hierarchical structure into metallic-glass electrodes. This specific shape allows a tiny amount of platinum to do the same amount of work as a solid block. The loading of this precious metal was reduced by 97% without losing any efficiency in the chemical reaction. This makes the production of clean hydrogen fuel much more economically viable for the first time. It turns a luxury material into a practical tool for the global shift to green energy.
From the abstract
Cost of Pt still limits the scale-up of proton-exchange-membrane (PEM) water electrolysis. The challenge is not merely to use less Pt, but to sustain high HER activity and durability at ultralow Pt supply. Here we develop a cathode based on a noble-metal-free, acid-tolerant Zr-based metallic glass with an ultralow-Pt layer. Elliptical vibration chiseling patterns the bulk substrate in one step into a three-level architecture of millimeter grooves, micrometer ribs and sub-100-nm shear bands, foll