6 results about "Reduction Activity" patented technology

This invention belongs to the fields of catalytic chemistry and fine chemicals, and discloses a halogen-modified supported noble metal catalyst and its application in the synthesis of oxaragoli key intermediates. The catalyst uses alumina or modified alumina as a support, loads the active component (noble metal), and modifies its surface electronic structure through halide ions. The preparation method includes precursor conversion of the support, impregnation and reduction of the active metal, and post-modification and regulation of halide ions. The catalyst obtained by this invention exhibits excellent hydrogenation reduction activity and selectivity for compounds containing C=N or C≡N bonds under mild conditions. Under room temperature and low-pressure hydrogen conditions, this catalyst can efficiently catalyze the conversion of 2-fluoro-6-trifluoromethylbenzaldehyde oxime to the oxaragoli key intermediate 2-fluoro-6-trifluoromethylbenzylamine, showing promising industrial application prospects.

The application discloses a preparation method of a low-noble-metal heterojunction fuel cell catalyst, which comprises the following steps: (1) preparing Pt-Co alloy nanoparticles; (2) preparing a cobalt acetate ethanol solution, placing the Pt-Co alloy nanoparticles in the cobalt acetate ethanol solution, stirring, growing a cobalt acetate film layer on the outer surface of the Pt-Co alloy nanoparticles, and obtaining the low-noble-metal heterojunction fuel cell catalyst. The preparation method can effectively reduce the use of Pt, reduce the preparation cost of the catalyst, and is suitable for large-scale application. The low-noble-metal heterojunction fuel cell catalyst has high oxygen reduction activity and can effectively improve the catalytic reaction efficiency.

The application belongs to the technical field of catalytic materials, and discloses a preparation method and application of a double cobalt atom catalyst. The target catalyst Co2-DAC is prepared through the steps of mixed liquid preparation, preheating dropwise adding, constant temperature refluxing and post-treatment purifying, and the reaction condition is mild, inert gas protection is not needed, the process is simple, and the cost is relatively low. The prepared catalyst takes double cobalt atoms as the active center, the atoms are uniformly dispersed, and the structure is stable. With the synergistic effect of the double active sites, the charge transport and CO2 activation performance can be improved, the catalyst shows high activity and stability in the photocatalytic CO2 reduction reaction, can effectively convert CO2 into high value-added products, and provides guidance for designing double atom catalysts with high photocatalytic CO2 reduction activity.

The disclosed technology includes methods of acquiring and trading a cryptocurrency using a pollution reduction system. The system includes a pollution reduction system, a sensor, a computing device, a communications network, and a cryptocurrency system. The method includes detecting a reduction of greenhouse gases (GHGs) produced by the pollution reduction system or an amount of plastics recycled by the plastics emissions system using the sensor responsive to operating the system. The method further includes determining carbon credits earned for the reduction of GHGs produced by the pollution reduction system. or determining plastic credits for the amount of plastics recovered or recycled using a plastics emissions calculation methodology. The method also includes awarding an amount of cryptocurrency corresponding to the reduction of GHGs produced by the pollution reduction system or the amount of plastics recycled by the plastics emissions pollution reduction system.

The application discloses a high-entropy oxide catalyst and a preparation method and application thereof. The high-entropy oxide containing Ni, Co and Mn is prepared by an oxalic acid coprecipitation method, oxalate and various transition metal ions are efficiently coordinated and precipitated, atomic-level uniform dispersion of metal elements is realized, a stable single-phase spinel structure is formed, and the oxidation-reduction activity, the lattice oxygen migration rate and the surface oxygen vacancy density of the material are greatly improved, and the deep degradation capacity of chlorobenzene is significantly enhanced.

The application belongs to the technical field of photocatalytic materials, and particularly relates to a hexabismuth bismuth silver acid dicyesium / metal organic framework MIL-53Fe heterojunction photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving iron chloride hexahydrate and 1,4-benzenedicarboxylic acid in dimethylformamide, and obtaining a metal organic framework MIL-53Fe by using a hydrothermal method; dissolving silver bromide and bismuth bromide in preheated hydrobromic acid, then adding cesium bromide, and obtaining hexabismuth bismuth silver acid dicyesium by using an acid precipitation method; dissolving the metal organic framework MIL-53Fe and the hexabismuth bismuth silver acid dicyesium in anhydrous ethanol, and obtaining the hexabismuth bismuth silver acid dicyesium / metal organic framework MIL-53Fe heterojunction photocatalyst by using a mechanical stirring method. The formation of the heterojunction can greatly improve the photocatalytic reduction activity of the hexabismuth bismuth silver acid dicyesium / metal organic framework MIL-53Fe on carbon dioxide.