Effect of high-pressure torsion on the hydrogen evolution performances of a melt-spun amorphous Fe73.5Si13.5B9Cu1Nb3 alloy. (16th July 2021)

• Record Type: Journal Article
• Authors: Chu, Fei; Wu, Kaiyao; Meng, Yuying; Edalati, Kaveh; Lin, Huai-Jun
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 49(2021)
• Page Start: 25029
• Page End: 25038
• Publication Date: 2021-07-16
• Subjects: Amorphous alloys -- High-pressure torsion -- Hydrogen evolution reaction -- Fe-based alloys -- Electrocatalysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.05.042
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a melt-spun amorphous Fe73.5 Si13.5 B9 Cu1 Nb3 alloy is subjected to high-pressure torsion (HPT) treatment under 6 GPa in order to enhance the alkaline hydrogen evolution reaction (HER) performance. Different HPT turns, including 1, 2, 5 and 10, are selected and the samples are marked as HPT-1N, HPT-2N, HPT-5N and HPT-10 N, respectively. The HPT treatment can lead to a significant structural change such as partial crystallization and defect generation on the Fe-based amorphous alloy with a considerable increase in the HER electrocatalytic activity. The HPT-5N sample shows the best catalytic performance, with an overpotential of only 174 mV at 10 mA cm −2 current density in 1 M KOH, which is 244 mV lower than that of the melt-spun alloy at the same condition. Moreover, it was established that the HPT-treated amorphous alloy shows good stability during the HER cycling process. Highlights: HPT improves HER performance of the amorphous Fe73.5 Si13.5 B9 Cu1 Nb3 alloy. Structural optimization induced by HPT is the key for improving HER catalytic activity. Materials preparation method is suitable for large-scale industrial applications.