Ruthenium-Alloyed Iron Phosphide Single Crystal with Increased Fermi Level for Efficient Hydrogen Evolution
Kang Y, Han Y, Chen H, Borrmann H, Adler P, Pohl D, Hantusch M, Konig M, He Y, Ma Y, Wang X, Felser C (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 14
Pages Range: 55587-55593
Journal Issue: 50
Abstract
Transition metal phosphide alloying is an effective approach for optimizing the electronic structure and improving the intrinsic performance of the hydrogen evolution reaction (HER). However, obtaining 3d transition metal phosphides alloyed with noble metals is still a challenge owing to their difference in electronegativity, and the influence of their electronic structure modulated by noble metals on the HER reaction also remains unclear. In this study, we successfully incorporated Ru into an Fe2P single crystal via the Bridgeman method and used it as a model catalyst, which effectively promoted HER. Hall transport measurements combined with first-principles calculations revealed that Ru acted as an electron dopant in the structure and increased the Fermi level, leading to a decreased water dissociation barrier and an improved electron-transfer Volmer step at low overpotentials. Additionally, the (21¯ 1) facet of Ru-Fe2P was found to be more active than its (001) facet, mainly due to the lower H desorption barrier at high overpotentials. The synergistic effect of Ru and Fe sites was also revealed to facilitate H∗ and OH∗ desorption compared with Fe2P. Therefore, this study elucidates the boosting effect of Ru-alloyed iron phosphides and offers new understanding about the relationship between their electronic structure and HER performance.
Involved external institutions
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
Technische Universität Dresden
Germany (DE)
Beihang University, Beijing University of Aeronautics and Astronautics (BUAA) / 北京航空航天大学
China (CN)
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
Technische Universität Dresden
Germany (DE)
Beihang University, Beijing University of Aeronautics and Astronautics (BUAA) / 北京航空航天大学
China (CN)
How to cite
APA:
Kang, Y., Han, Y., Chen, H., Borrmann, H., Adler, P., Pohl, D.,... Felser, C. (2022). Ruthenium-Alloyed Iron Phosphide Single Crystal with Increased Fermi Level for Efficient Hydrogen Evolution. ACS Applied Materials and Interfaces, 14(50), 55587-55593. https://doi.org/10.1021/acsami.2c16419
MLA:
Kang, Yu, et al. "Ruthenium-Alloyed Iron Phosphide Single Crystal with Increased Fermi Level for Efficient Hydrogen Evolution." ACS Applied Materials and Interfaces 14.50 (2022): 55587-55593.
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