2results about How to "Fast reaction kinetics" patented technology

This invention discloses a method for preparing and applying a sodium borohydride-modified self-supporting anode for AEM water electrolyzers. Firstly, an amorphous ternary metal hydroxyl oxide precursor is grown in situ on a nickel substrate via room temperature liquid phase deposition. The process involves the presence of Co in solution. 2+ Fe 3+ Ni ions are introduced through slight corrosion of the nickel foam matrix. 2+ The ions, the three, and the OH- produced by hydrolysis ⁻ Co-deposition occurs under the influence of dissolved oxygen, leading to the self-assembly of amorphous nanosheet structures on the substrate surface. Subsequently, a mild chemical reduction treatment with sodium borohydride solution is used to obtain a structurally stable and high-performance self-supporting electrode. The method described in this embodiment is mild, simple, low-cost, and has good versatility.

This invention belongs to the field of alkaline hydrogen fuel cell catalyst preparation technology, specifically providing a fluorinated modified supported ruthenium-based fuel cell anode catalyst and its preparation method, to solve the problems of easy flooding, low stability, and limited hydrogen evolution / hydrogen oxidation (HOR) activity of existing ruthenium-based anode catalysts in alkaline media. In this invention, the active components of the anode catalyst are an oxide support and Ru nanoparticles supported on the support, and the oxide support is doped with fluoride ions through a fluorination process. This invention introduces a fluorine source (such as ammonium fluoride) during the reduction process of the metal oxide precursor for fluorination, utilizing the anion (fluoride ion) regulation effect at high temperature and the etching effect of HF to achieve precise modification of the catalyst. Ultimately, this invention not only significantly improves the HOR activity of the supported ruthenium-based fuel cell anode catalyst over a wide potential range, but also greatly enhances its long-term operational stability.