8 results about "Iridium compound" patented technology

The application relates to a kind of metal iridium complex and its application.The metal iridium compound has the general formula of Ir (La) (Lb) (Lc), wherein La is the structure shown in formula (1), and Lb is the structure shown in formula (2).The compound provided by the application has the advantages of good light and electrical stability, high luminous efficiency, long service life, high color saturation, etc., and can be used in organic light-emitting devices, especially as red light-emitting phosphor materials, and has the possibility of being applied to the AMOLED industry, especially for display, lighting and automobile tail light.

A process for the manufacture of a catalyst-coated polymer electrolyte membrane for a water electrolyser comprising an iridium-containing anode layer is provided. The process comprises the steps of: (i) provision of a polymer electrolyte membrane with a first major surface and a second opposed major surface; (ii) plasma treatment of the first major surface of the polymer electrolyte membrane to form an etched polymer electrolyte surface layer; (iii) vapour deposition of an iridium-containing compound onto the etched polymer electrolyte surface layer to form the iridium-containing anode layer.

The present invention relates to an oxygen evolution electrode catalyst comprising bismuth (Bi), wherein the bismuth exists together with iridium or an iridium compound to provide improved durability in an oxygen evolution reaction.

This invention provides a method for recovering Pt and Ir from waste water electrolysis membrane electrodes, comprising the following steps: Step S1. Dissolving and separating platinum and iridium: The waste water electrolysis membrane electrode is soaked in an organic solvent and separated to obtain a catalyst mixture residue. The catalyst mixture residue is added to a first reagent and calcined at high temperature to obtain precious metal residue. The precious metal residue is dissolved in hydrochloric acid and filtered to obtain a mixed residue. Then, the mixed residue is dissolved in a solvent and filtered to obtain chloroplatinic acid and iridium residue. The chloroplatinic acid is then reduced and purified to obtain platinum compound or platinum black. Step S2. Separating iridium: The iridium residue is added to a second reagent to oxidize and dissolve the iridium residue into chloroiridium acid and insoluble residue. The chloroiridium acid is oxidized with an oxidant, and then ammonium chloride is added and stirred to precipitate it to obtain ammonium chloroiridate. After purification, iridium compound or iridium black is prepared, and the insoluble residue is dissolved in aqua regia for reuse. This invention adds hydroxide to the precious metal residue during calcination, minimizing mechanical entrainment loss and preventing melt splashing during oxidative calcination.

The synthesis method comprises the following steps: by taking an aldehyde group as a guiding group, taking a (hetero) aryl aldehyde compound and a (hetero) aromatic compound as reaction substrates and taking an iridium compound as a catalyst, carrying out reaction on the aldehyde group and the (hetero) aromatic compound under the synergistic effect of an oxidizing agent, an additive, a solvent, temperature and time, so as to obtain the (hetero) aromatic compound. Through a C-H / C-H oxidative coupling mode, the ortho-position aldehyde group substituted di (hetero) aromatic compound is efficiently prepared, and the technical problems that the aldehyde group coordination capacity is weak, side reactions are prone to occurring and the like are solved. Meanwhile, the bis (hetero) aromatic hydrocarbon compound and the derivative thereof can be used as a multicolor fluorescent probe with excellent performance, specific marking and high-resolution imaging of lipid droplets in living cells and mouse fatty liver are realized, and a new tool is provided for diagnosis of metabolic diseases.

The invention discloses an IrxCo3-xO4 / Ir-Co3O4 heterostructure electrocatalyst as well as a preparation method and application of the IrxCo3-xO4 / Ir-Co3O4 heterostructure electrocatalyst in combination with co-deposition and defect regulation, and belongs to the technical field of catalyst preparation. Comprising the following steps: dissolving an iridium-containing compound and a cobalt-containing compound in deionized water to prepare a precursor solution, and carrying out cathode co-deposition treatment in a three-electrode system; calcining the sample, creating abundant anion and cation vacancies in the material through plasma treatment, and calcining again to eliminate oxygen ion vacancies; the treated sample is soaked in an IrCl3 solution, heat treatment is carried out after the solvent is evaporated to dryness, and the IrxCo < 3-x > O < 4 > / Ir-Co3O4 heterostructure electrocatalyst is prepared. The heterostructure catalyst can effectively improve an electronic structure around an Ir active center, strengthen interaction of a metal-metal oxide carrier, inhibit over-oxidation of atoms in the Ir active center, greatly improve the activity and stability of the catalyst, and improve the catalytic activity of the catalyst. Therefore, the technical problems of low activity, low quality activity and poor stability of a noble metal-based catalyst in the prior art can be effectively solved.

The application discloses a method for preparing platinum group metals from waste materials. The method comprises the following steps: high-temperature calcination of the waste materials with activated carbon and combustion-supporting agents to remove organic matters; high-temperature calcination of the waste materials with zinc powder to activate the waste materials; removal of part of impurities through subsequent oxidation leaching; preparation of a solution and a crystal corresponding to a platinum group metal compound through an oxidation-reduction process; reduction and dissolution of the platinum group metal compound with the aid of a reaction aid; purification of the platinum group metal compound through ammonium sulfide to obtain a pure iridium compound; purification of the pure iridium compound through adsorption resin to obtain a pure rhodium compound crystal; and finally, calcination and reduction to obtain a corresponding high-purity platinum group metal powder.

According to one embodiment, a method of synthesizing an organometallic iridium monomer compound includes obtaining a dimeric iridium compound having a halogenated bridge, refluxing a mixture comprising the dimeric iridium compound, a base, an ancillary ligand, and 1,2-dimethoxyethane for forming a precipitate of an organometallic iridium monomer, and filtering the refluxed mixture to collect the organometallic iridium monomer precipitate.