6 results about "Synthetic ligands" patented technology

The application discloses a single-center catalyst and a preparation method and application thereof. The catalyst system introduces a large steric hindrance aniline on a highly rigid 2-phenyl quinoline skeleton, thereby providing better protection for the active center of the catalytic system, enhancing the high-temperature resistance and activity of the catalytic olefin polymerization, and the polymerization activity at 150 DEG C can be more than 1*10 7 6 g / (mol.h). The synthetic route adopted in the application is simple and easy to operate, and a ligand with a high yield can be obtained through one-step reaction, that is, the yield of the ligand synthesized from 2-phenyl-8-amino quinoline raw material is more than 75%, which is favorable for improving the production efficiency and yield of the product.

The application discloses an organic complex of different metals LTG-RuCe and a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the organic complex of different metals LTG-RuCe comprises the following steps: synthesizing a ligand HL by using methyl formylbenzoate, 2-acetylpyridine, ethanol, potassium hydroxide and ammonia water; synthesizing a ligand [Ru(HL)2]·(PF6)2 by using trichlororuthenium, the ligand HL, methanol, potassium hydroxide and HPF6; and synthesizing the organic complex of different metals LTG-RuCe by using cerium nitrate hexahydrate, the ligand [Ru(HL)2]·(PF6)2 and N,N-dimethylformamide. The organic complex of different metals LTG-RuCe synthesized by the application has high CO2 catalytic activity, good repeatability and a structure which is not easy to collapse; and the method for preparing the organic complex of different metals provided by the application has high yield and strong operability.

The present application relates to the technical field of catalyst, in particular to a synthesis method of active site adjustable bimetallic catalyst.The synthesis method of active site adjustable bimetallic catalyst comprises the following steps: synthesizing ligand;preparing bimetallic complex;limiting domain pyrolysis carbonization.The present application first takes p-tert-butylphenol, polyformaldehyde and bis(2-pyridylmethyl)amine as raw materials, reacts in a mixed solvent to synthesize ligand Hbpbp, then sequentially reacts with metal salt in methanol by a stepwise coordination method to construct homonuclear or heteronuclear bimetallic complex, finally uniformly mixes the complex with carbon black and dicyandiamide, and performs programmed temperature carbonization under inert atmosphere to prepare bimetallic catalyst with atomic level dispersion structure, realizes accurate anchoring and stable loading of bimetallic sites on the carbon carrier, and not only has high activity and stability in electrocatalytic carbon dioxide reduction reaction, but also can efficiently activate peroxymonosulfate for pollutant degradation.

The application relates to the field of semiconductors, and particularly relates to a quasi-solid-phase-based fuel cell platinum-based catalyst and a preparation method thereof. A preparation method of a quasi-solid-phase-based fuel cell platinum-based catalyst comprises the following steps: mixing an organic synthetic ligand, a catalyst carrier and a platinum-based organic ligand in a low-boiling-point organic solvent; removing the low-boiling-point organic solvent to obtain a pre-annealed precursor; and high-temperature annealing the pre-annealed precursor under an argon gas atmosphere or an argon-hydrogen gas atmosphere at 230-290 DEG C for 1-2 hours to obtain the quasi-solid-phase-based fuel cell platinum-based catalyst. The quasi-solid-phase method can prevent the agglomeration of nanoparticles under high-temperature conditions, realize accurate micro-control of the size of platinum-based nanoparticles, and the synthesized platinum-based nanoparticle material has small particle size, good performance and high stability.

The invention relates to the technical field of catalysts, in particular to a synthesis method of an active site adjustable bimetallic catalyst. The invention discloses a synthesis method of an active site adjustable bimetallic catalyst. The synthesis method comprises the following steps: synthesizing a ligand; preparing a bimetallic complex; and carrying out confined domain pyrolysis and carbonization. The preparation method comprises the following steps: reacting p-tert-butylphenol, paraformaldehyde and di (2-pyridyl methyl) amine serving as raw materials in a mixed solvent to synthesize a ligand Hbpbp, sequentially reacting the ligand Hbpbp with metal salt in methanol through a step-by-step coordination method to construct a homonuclear or heteronuclear bimetallic complex, and finally uniformly mixing the complex with carbon black and dicyandiamide to obtain the carbon black / dicyandiamide complex. The bimetallic catalyst with an atomic-scale dispersion structure is prepared by carrying out temperature programmed carbonization in an inert atmosphere, so that precise anchoring and stable loading of bimetallic sites on a carbon carrier are realized, and the bimetallic catalyst not only has high activity and stability in an electro-catalysis carbon dioxide reduction reaction, but also can efficiently activate peroxymonosulfate for pollutant degradation.

The invention discloses a gas sensitive material, a preparation method thereof and a mould detection sensor, and belongs to the technical field of gas sensing. The gas sensitive material comprises a metal oxide matrix and an AuPt bimetallic alloy nanocluster loaded on the surface of the metal oxide matrix, wherein the atomic ratio of Pt to Au in the cluster is (0.1: 1)-(0.5: 1). The preparation method comprises the following steps: synthesizing the ligand-protected AuPt bimetallic nanocluster, anchoring the ligand-protected AuPt bimetallic nanocluster on the surface of the metal oxide matrix by a post-loading method, and finally roasting at low temperature to remove the ligand. According to the material, the synergistic effect of the bimetallic nanoclusters is utilized, and the response rate, the sensitivity and the selectivity to the mould marker 1-octylene-3-alcohol are remarkably improved. The detection limit of a sensor constructed based on the material to 1-octylene-3-alcohol at 150 DEG C reaches 12 ppb, various moulds such as aspergillus flavus and aspergillus niger can be effectively recognized, the detection limit to the aspergillus flavus is as low as 10 CFU / mL, and the material has application prospects in the field of food safety monitoring.