4 results about "Transition metal nanoparticles" patented technology

This invention belongs to the field of electrochemical energy storage materials and devices, specifically relating to an artificial interface layer for lithium anodes, its preparation method, and its application. The artificial interface layer for lithium anodes provided by this invention comprises a composite of transition metal nanoparticles and carbon, and a fluoropolymer. It solves the problem in existing technologies where the use of low-ionic-conductivity organic binders in artificial SEI layers leads to slow lithium-ion transport kinetics at the interface, making it difficult to balance high mechanical strength and rapid ion transport. This results in an artificial interface layer with excellent rate performance and cycle stability.

The application provides a carbon-based transition metal nanoparticle and single-atom synergistic electrocatalyst, a preparation method, application and a zinc-air battery, and belongs to the technical field of electrocatalysis and metal-air batteries. In the application, through the competitive anchoring and limited action of a nitrogen-containing metal chelating agent and a nitrogen-rich precursor on metal atoms in a pyrolysis process, in-situ construction and stable coexistence of transition metal nanoparticles and single atoms are realized in one step, a single-atom-nanoparticle synergistic structure is formed, the single-atom sites dominate the efficient oxygen reduction reaction, and the nanoparticle sites dominate the efficient oxygen evolution reaction. The method has the advantages of simple process, good repeatability, easy scaling from a kilogram to a kilogram, and consistent catalyst structure performance after scaling. The membrane electrode and the zinc-air battery based on the catalyst show excellent bifunctional catalytic activity, high power density and long cycle stability, and provide a complete technical solution from materials to devices for the commercialization of high-performance and low-cost zinc-air batteries.

The application belongs to the technical field of catalytic materials, and particularly relates to a porous catalytic material based on hyperbranched polyamide-amine and application thereof in biomass hydrodeoxygenation reaction. The porous catalytic material based on hyperbranched polyamide-amine is prepared by using maleic anhydride modified hyperbranched polyamide-amine as a carrier, loading transition metal nanoparticles on the carrier, and then performing cross-linking reaction between the carrier and a silicone prepolymer. The porous catalytic material based on hyperbranched polyamide-amine has a hierarchical pore structure, a high specific surface area, excellent mechanical strength and outstanding thermal stability. The cavity structure of the maleic anhydride modified hyperbranched polyamide-amine can effectively inhibit the agglomeration of transition metal nanoparticles at high temperatures. The silicone cross-linking network endows the porous catalytic material based on hyperbranched polyamide-amine with structural stability at high temperatures, so that the porous catalytic material based on hyperbranched polyamide-amine can exhibit high activity, high selectivity and excellent cycle stability in biomass hydrodeoxygenation reaction.

A catalyst comprising transition metal nanoparticles, stabilizing ligands, and a support material, wherein at least a portion of the stabilizing ligands are adsorbed on the surface of the transition metal nanoparticles such as to form stabilized transition metal nanoparticles, wherein the stabilized transition metal nanoparticles are supported on the support material, wherein the catalyst displays a molar ratio of the stabilizing ligands to the transition metal in the nanoparticles calculated as the element, wherein the molar ratio is comprised in the range of from 0.1 to 25.