Nanoscale heterogeneous FeB metallic glass as highly active and stable catalyst for hydrogen evolution

Metallic glasses (MGs, also known as amorphous alloys) have shown excellent hydrogen evolution performances due to the unique long-distance disorder atomic structures. Here, we demonstrate that the hydrogen evolution performances of MG can be greatly improved by introducing nanoscale heterogeneous s...

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Bibliographic Details
Published in:Journal of alloys and compounds 2023-10, Vol.960, p.170964, Article 170964
Main Authors: Chu, Fei, Jian, Xiying, Edalati, Kaveh, Yan, Yuqiang, Ke, Haibo, Zhang, Peng, Lin, Huai-Jun
Format: Article
Language:English
Subjects:
Electrocatalysis
Heterogeneous structures
High-pressure torsion
Hydrogen evolution
Metallic glass
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Summary:Metallic glasses (MGs, also known as amorphous alloys) have shown excellent hydrogen evolution performances due to the unique long-distance disorder atomic structures. Here, we demonstrate that the hydrogen evolution performances of MG can be greatly improved by introducing nanoscale heterogeneous structures. A nanoscale homogeneous Fe75B25 MG (Homo-MG) is prepared by melt-spinning, and then it is processed by severe plastic deformation to form a nanoscale heterogenous Fe75B25 MG (Hetero-MG). The hetero-MG shows superior activity and stability of hydrogen evolution compared with those of the homo-MG. The overpotential at 10 mA cm−2 of the hetero-MG is only 116 mV in 1 M KOH, which is much smaller than that of the homo-MG of 402 mV. Moreover, the hetero-MG shows very high and stable catalytic performances even at industrial level current densities (e.g., 300 mA cm−2) which could not be obtained in the homo-MG. This study clearly shows that fabrication of nanoscale heterogeneous structures is an effective strategy to improve the catalytic performances of MGs, and it also has a very positive guiding significance for further promoting the application of MG in energy conversion and storage, sewage degradation, catalysis, and other fields. [Display omitted] •Nanoscale homogeneous and heterogenous Fe-B MGs are prepared and studied as HER electrocatalysts.•Nanoscale heterogenous Fe-B MG shows superior activity and stability of HER.•Industrial level current densities for HER are achieved for the nanoscale heterogenous Fe-B MG.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2023.170964