一种缺陷调控型电催化剂及其制备方法和应用
By in-situ growing a nickel-iron-based precursor and a molybdenum sulfide composite on a three-dimensional conductive substrate and annealing it in a low-temperature mixed atmosphere of hydrogen and inert gas, a hierarchical porous structure and dual-defect active sites are constructed, solving the problem of simultaneously constructing high concentrations of sulfur vacancies and oxygen vacancies in existing technologies, thus improving the oxygen evolution and hydrogen evolution performance of the electrocatalyst.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods struggle to simultaneously and efficiently construct high concentrations of sulfur and oxygen vacancies in nickel-iron/molybdenum sulfide composite electrocatalysts while maintaining close contact at the heterogeneous interface, thus limiting the improvement of the catalyst's oxygen evolution and hydrogen evolution performance.
By in-situ growing a nickel-iron-based precursor and a molybdenum sulfide composite on a three-dimensional conductive substrate and annealing it in a low-temperature hydrogen and inert gas mixed atmosphere, sulfur vacancies and oxygen vacancies are introduced, while retaining a tight heterogeneous interface, a hierarchical porous structure is constructed.
It improves the oxygen evolution activity and stability of the electrocatalyst, reduces the hydrogen evolution and oxygen evolution overpotential, and increases the efficiency of the total water splitting voltage.
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Figure CN122406261A_ABST