6 results about "Cobalt phthalocyanine" patented technology

The application provides a method for efficiently synthesizing formaldehyde by electrocatalysis of carbon monoxide, and the core is: first, a phthalocyanine cobalt molecular material is used as an electrocatalyst for selectively preparing formaldehyde, the material has a clear C1 selective formaldehyde generation path, and can essentially inhibit the undesired C-C coupling of intermediates; second, the reaction is carried out under high carbon monoxide pressure to enhance the competitive adsorption effect of carbon monoxide. The application proposes a carbon monoxide competitive adsorption strategy, which combines the intrinsic substituent regulation of phthalocyanine cobalt molecular materials and external carbon monoxide pressurization to inhibit the over-reduction of formaldehyde, detach the formaldehyde intermediate from the active site, and realize the selective electro-synthesis. The CoPc-OMe MDE optimized by the application realizes 98% CO-to-HCHO selectivity under 90 bar carbon monoxide, the peak Faraday efficiency is 72%, and the formaldehyde partial current density is more than 110 mA·cm ‑2 .

The application provides a preparation method of a high-spin-state cobalt monatomic catalyst and application of the high-spin-state cobalt monatomic catalyst in neutral electro-synthesis of hydrogen peroxide, and belongs to the technical field of electro-catalytic synthesis. A conductive carbon material dispersion liquid is mixed with a binuclear sulfonated cobalt phthalocyanine dispersion liquid, an adsorption reaction is carried out under magnetic stirring, and the obtained mixed liquid is subjected to suction filtration, washing and drying to obtain the high-spin-state cobalt monatomic catalyst, which has the advantages of simple steps and high repeatability. In the application, the binuclear sulfonated cobalt phthalocyanine is loaded on the conductive carbon material to realize construction of a high-spin-state cobalt center, so as to promote activation of O2 and improve reaction kinetics, and the application has excellent catalytic activity, hydrogen peroxide selectivity and stability in the neutral electro-synthesis of hydrogen peroxide. The application can also be used for synthesizing pure hydrogen peroxide solution with a concentration reaching the medical-grade disinfectant water standard, and the voltage of a reaction cell is lower than 2.2 V, so the application has great application potential of low energy consumption and direct synthesis.

This invention relates to the field of water treatment technology, specifically to a non-aeration, low-current-density electrocatalytic oxidation water treatment method and electrocatalytic membrane, comprising the following steps: S1, placing a cobalt phthalocyanine-functionalized carbon nanotube electrocatalytic membrane into a membrane module as the cathode of the electrocatalytic reaction device; wherein, the cobalt phthalocyanine-functionalized carbon nanotube electrocatalytic membrane is obtained by the following preparation method: carbon nanotubes are acid-washed, functionalized and modified, then composited with cobalt phthalocyanine and calcined, then mixed with a polyvinyl alcohol solution and sprayed onto a base membrane material and crosslinked; S2, connecting the positive and negative electrodes of a power supply to the counter electrode and cathode respectively, and transporting the water sample to be treated into the electrocatalytic reaction device, controlling the current density ≥ 0.15 mA / cm². 2 No aeration is required during the treatment process. The electrocatalytic oxidation water treatment method of this invention is applicable to a wide range of water qualities and can stably treat novel antibiotic pollutants by generating hydroxyl radicals to achieve the oxidative degradation of pollutants.

The application discloses a kind of catalyst and preparation method and application of photocatalytic CO2 reduction product synthesis gas coupling PLA upgrading, belong to catalyst technical field.The preparation method of the present application includes the following steps: cobalt phthalocyanine is added with cadmium source precursor in sodium citrate dihydrate aqueous solution, then sequentially adding sulfur source precursor aqueous solution and ammonia, reaction is carried out at a certain temperature;After reaction, product is collected and purified, to obtain photocatalytic CO2 reduction product synthesis gas coupling PLA upgrading catalyst.The catalyst of the present application has the effect of reducing CO2 and H2O simultaneously and performing PLA pretreatment liquid oxidation, and the synthesis gas release efficiency, PA production rate and selectivity are high.The present application uses visible light as energy to drive the reaction, reduces energy consumption and environmental pollution;And energy fuel and high value-added chemicals can be produced synchronously, with great environmental and economic benefits, and the photocatalytic process does not produce harmful byproducts, in line with the principles of green chemistry.

The present application relates to the technical field of electrocatalyst, in particular to a method for preparing a cobalt phthalocyanine / gadolinium oxide composite electrocatalyst by rapid Joule heat and application thereof, and its technical points are as follows: gadolinium source and organic ligand are dispersed in an organic solvent, carbon black is added, and after ultrasonic mixing and stirring, the precursor is obtained by drying; the precursor is subjected to rapid Joule heat treatment, and gadolinium oxide nanocrystals are grown in situ on the carbon black carrier to obtain a Gd2O3 / CB composite material; phthalocyanine cobalt and the Gd2O3 / CB composite material are subjected to liquid phase immersion treatment in a mixed solvent, so that the phthalocyanine cobalt molecules are anchored on the composite substrate, and after filtration and drying, the CoPc@Gd2O3 / CB catalyst is obtained; by constructing a strong electronic coupling composite structure of CoPc and Gd2O3 / CB in situ, the electronic transmission efficiency is significantly improved, the molecular aggregation is inhibited, and the COOH generation energy barrier is reduced, so that high current density and high CO Faraday efficiency are realized.

The application belongs to the technical field of electrocatalytic synthesis and nanomaterials, and particularly relates to a catalyst for preparing glycolic acid by selective oxidation of ethylene glycol and a preparation method thereof.The catalyst has a multi-stage composite structure: taking a nickel-based metal organic framework as a precursor, high-temperature thermal reduction and carbonization are performed to reconstruct a carbon nanotube conductive substrate loaded with nickel nanoparticle tips; on this basis, cobalt phthalocyanine molecules with clear active centers are loaded by a non-covalent bonding mode. By regulating the substituent structure around the cobalt phthalocyanine molecules, the selectivity of the catalyst to the ethylene glycol oxidation path can be finely adjusted, and efficient directional conversion of the glycolic acid product can be realized. The catalyst completely uses non-noble metals, has the advantages of high activity, excellent selectivity, good stability and low cost; the preparation process is simple and controllable, and has good reproducibility, thereby providing an efficient and reliable catalyst solution for green electrocatalytic value-added conversion of ethylene glycol.