2 results about "Anisotropic growth" patented technology

This invention discloses a method for preparing noble metal-based ultrafine nanowire catalysts, belonging to the field of nanomaterial synthesis and controlled growth technology. The method includes: dissolving a noble metal and a second metal precursor in a high-boiling-point organic solvent; introducing a gas containing carbon monoxide into the liquid-phase reaction system, utilizing the dynamic adsorption-desorption equilibrium established by carbon monoxide on the surface of the growing nanocrystals to selectively inhibit radial growth of the nanocrystals and induce their one-dimensional anisotropic growth, forming an ultrafine nanowire structure. This invention, by precisely controlling parameters such as gas partial pressure and reaction temperature, can stably prepare ultrafine nanowires with an average diameter of less than 3 nm, and can achieve atomic-level homogeneous alloying of macroscopically immiscible metal systems such as Pt-Ru through kinetic control strategies. This method is simple, highly controllable, and provides an effective route for the large-scale preparation of high-performance noble metal-based one-dimensional nanocatalysts.

This invention belongs to the field of anti-corrosion materials technology, and specifically relates to an anti-corrosion material, its preparation method, and its application. The anti-corrosion material of this invention includes a substrate and an anti-corrosion layer located on the surface of the substrate. The anti-corrosion layer comprises polyisobutylene, butyl rubber, petroleum resin, and a first filler. The first filler includes basic magnesium stearate-calcium complex salt and serpentine precursor. Upon contact with water, the first filler undergoes a crystallization reaction to generate hydrate crystals with anisotropic growth characteristics, producing sufficient crystallization growth stress to fill microscopic gaps, thus blocking the crevice corrosion pathway at its source and achieving excellent anti-corrosion effects. Simultaneously, the synergistic effect between the first and second protective layers solves the problem of traditional anti-corrosion methods being unable to protect irregularly shaped structural gaps, offering advantages such as convenient construction, reliable protection, and long-term self-adaptive properties, fundamentally eliminating crevice corrosion.