Design of binder-free hierarchical Mo-Fe-Ni phosphides nanowires array anchored on carbon cloth with high electrocatalytic capability toward hydrogen evolution reaction
JOURNAL OF ALLOYS AND COMPOUNDS(2022)
摘要
It is of immense importance to design and explore efficient electrocatalysts based on low-cost noble-metal free nanostructures toward hydrogen evolution reaction (HER), which remains an immense challenge. Herein, we designed a novel tri-metal phosphides based on Mo-Fe-Ni phosphides nanowires (Mo-Fe-Ni-P NWs) that directly grown on CC through a facile and simple hydrothermal process followed by a phosphorization step in the presence of NaH2PO2 as the P source. Outstandingly, benefiting from the unparalleled hierarchical NWs structure with large surface areas, open channels for effective releasing of gas products, and also special electronic structure engineering with rapid mass/electron transport, the resulting advanced binder-free Mo-Fe-Ni-P NWs@CC renders supreme HER performance in the KOH (alkaline) electrolyte. At an overpotential as low as 75 mV, it renders a current density of 10 mA cm-2. More importantly, it can achieve remarkable operational stability that is very desirable for practical application. Our design exhibits a rational strategy for the fabrication of advanced binder-free ternary metal phosphide NWs as a noble-metal free HER electrocatalyst toward high efficient with low cost H2 production. (c) 2021 Elsevier B.V. All rights reserved.
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关键词
Binder-free electrode,Mixed metal phosphides,Hydrogen evolution reaction
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