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Constructing partially amorphous NiMoB/NiMoO4−x with borate doping and reduction through one step boosting hydrogen evolution.
- Source :
-
Journal of Alloys & Compounds . Feb2024, Vol. 973, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- The pursuit of efficient and stable electrochemical catalysts based on transition metals (TMs) for the hydrogen evolution reaction (HER) is of paramount importance. Herein, a novel partially amorphous NiMoB/NiMoO 4−x catalyst with dense nanoparticle assemblies has been prepared with B doping and reduction by one step NaBH 4 treatment of smooth nanorod-like NiMoO 4 precursor. Benefiting from the MoNi 4 alloys partially reduced from NiMoO 4 precursor, optimized electronic state through B doping and partially amorphous structure, NiMoB/NiMoO 4−x obtained splendid activity for HER with a lower overpotential of 26.2 mV at 10 mA cm 2 coupled with a narrow Tafel slope of 66.75 mV dec 1, in contrast to NiMoO 4 precursor catalyst (260.24 @10 mA cm 2, 149 mV dec 1) in alkaline solution. Additionally, the self-supported NiMoB/NiMoO 4−x electrode exhibits remarkable stability, maintaining a current density of 50 mA cm 2 for a minimum of 40 h attributed to mixed phases of MoNi 4 and amorphous NiMoO 4−x for accelerating the H 2 evolution and enhancing water adsorption. This work offers a facile avenue to rationally design high-performance electrocatalysts for enhancing hydrogen evolution with NaBH 4 accompanying borate doping and reduction. [Display omitted] • Partially amorphous NiMoB/NiMoO 4−x was constructed by one step hydrothermal. • MoNi 4 alloys accelerate H 2 evolution assisted by amorphous NiMoO 4−x. • Oxygen vacancies (O v) can enhance the conductivity and hydrogen spillover effect. • B doping effectively modulates the electronic structure of NiMoB/NiMoO 4−x. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 973
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 174034832
- Full Text :
- https://doi.org/10.1016/j.jallcom.2023.172857