Effect of high-pressure torsion on the hydrogen evolution performances of a melt-spun amorphous Fe73.5Si13.5B9Cu1Nb3 alloy

In this work, a melt-spun amorphous Fe73.5Si13.5B9Cu1Nb3 alloy is subjected to high-pressure torsion (HPT) treatment under 6 GPa in order enhance the alkaline hydrogen evolution reaction (HER) performance. Different HPT turns, including 1, 2, 5 and 10, are selected samples marked as HPT-1N, HPT-2N, HPT-5N HPT-10 N, respectively. The can lead significant structural change such partial crystallization defect generation on Fe-based with considerable increase HER electrocatalytic activity. sample shows best catalytic performance, an overpotential of only 174 mV at 10 mA cm?2 current density 1 M KOH, which 244 lower than that same condition. Moreover, it was established HPT-treated good stability during cycling process.