The present invention relates to a process for producing a noble metal-modified, graphitized carbon material, comprising providing a graphitized carbon material, wherein the graphitized carbon material has a degree of graphitization of at least 10%, impregnating the graphitized carbon material with a composition and thermal treatment of the impregnated graphitized carbon material. The composition comprises an organic solvent and at least one organic noble metal complex dissolved in the organic solvent. The invention further relates to a supported catalyst produced by this process and to an electrochemical cell containing this supported catalyst.
The invention relates to a method for the catalyzed decomposition of lignin with a high yield and high selectivity for phenolic building blocks and with minimal formation of the coke fraction, and to a catalyst suitable for the method. The catalyst contains a basic carrier material, platinum at a weight percentage of 1-10 wt.% and nickel at a weight percentage of 0-5 wt.%. The method comprises: providing a reaction mixture comprising - lignin, - the catalyst and - a solvent; and heating the reaction mixture so as to obtain a mixture comprising - a product mix, - the catalyst and - the solvent.
The invention relates to a coated membrane containing - a membrane with a front and a rear face, - a catalyst-containing coating which is provided on the front face of the membrane, - said catalyst containing - a support material which has a BET surface area of maximally 80 m2/g, and - an iridium-containing coating which is provided on the support material and which contains an iridium oxide, an iridium hydroxide, or an iridium hydroxide oxide or a mixture of at least two of said iridium compounds, wherein - the catalyst contains iridium in a quantity of maximally 60 wt.%, and - the coating provided on the membrane front face has an iridium content of maximally 0.4 mg iridium / cm2.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 11/054 - Electrodes comprising electrocatalysts supported on a carrier
C25B 11/067 - Inorganic compound e.g. ITO, silica or titania
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
4.
IRIDIUM-CONTAINING CATALYST FOR WATER ELECTROLYSIS
The invention relates to a particulate catalyst, containing: - a support material, - an iridium-containing coating which is provided on the support material and which contains iridium oxide, an iridium hydroxide, or an iridium hydroxide oxide, wherein the support material has a BET surface area ranging from 2 m2/g to 50 m2/g, and the iridium content of the catalyst satisfies the following condition: (1.505 (g/m2) x BET) / (1 + 0.0176 (g/m2) x BET) ? Ir-G ? (4.012 (g/m2) x BET) / (1 + 0.0468 (g/m2) x BET), where BET is the BET surface area of the support material, in m2/g, and Ir-G is the iridium content, in wt.%, of the catalyst.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 9/23 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
C25B 11/054 - Electrodes comprising electrocatalysts supported on a carrier
C25B 11/067 - Inorganic compound e.g. ITO, silica or titania
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
5.
NOBLE METAL COMPLEXES COMPRISING DIOLEFIN AND C6-C18 MONOCARBOXYLATE LIGANDS FOR SURFACE COATING
The invention relates to a noble metal complex comprising diolefin and C6-C18 monocarboxylate ligands of the type [LPd[O(CO)R1]X]n, [LRh[O(CO)R1]]m or [LIr[O(CO)R1]]m, in which L represents a compound acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide and -O(CO)R2, wherein -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid residues, in each case with the exception of a phenylacetic acid residue, and wherein n is an integer ? 1 and m is an integer ? 2.
C07F 15/00 - Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic System
C23C 18/08 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of metallic material
The invention relates to a platinum complex of the type [L1L2Pt[0(C0)R1]X]n, wherein L1 and L2 are the same or different monoolefin ligands or together represent a compound L1L2 acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide and -0(C0)R2, wherein -0(C0)R1 and -0(C0)R2 are the same or different C6-C18 or C8- C18 non-aromatic monocarboxylic acid residues with the exception of a phenylacetic acid residue, or together represent a C8-C18 non-aromatic dicarboxylic acid residue -0(C0)R1R2(C0)0-, wherein it is a mononuclear platinum complex where n = 1 or if L1L2 and/or of -0(C0)R1 R2(C0)0- is present, it may be a polynuclear platinum complex with a whole number n > 1.
C07F 15/00 - Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic System
C23C 18/08 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of metallic material
7.
CATALYST FOR OXYGEN GENERATION REACTION DURING WATER ELECTROLYSIS
The invention relates to a method for preparing a catalyst composition, wherein - in an aqueous medium containing an iridium compound, at a pH = 9, an iridium-containing solid is deposited on a support material, and - the support material loaded with the iridium-containing solid is separated from the aqueous medium and dried, wherein, in the method, the support material loaded with the iridium-containing solid is not subjected to a thermal treatment at a temperature of more than 250°C for a period of time of longer than 1 hour.
The present invention relates to a method for producing a membrane for a fuel cell or electrolytic cell, in which (i) a liquid coating composition, which contains a supported catalyst containing precious metal and also contains an ionomer, is applied to a polymer electrolyte membrane which contains an ionomer, the ionomer of the liquid coating composition and the ionomer of the polymer electrolyte membrane each being a copolymer which contains as monomer a fluoroethylene and a fluorovinyl ether containing a sulfonic acid group, (ii) the coated polymer electrolyte membrane is heated to a temperature in the range from 178°C to 250°C.
C09D 141/00 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic rin; Coating compositions based on derivatives of such polymers
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
A process for producing precious gold metals (PGM)-enriched alloy comprising Pt, Pd and Rh. In the process, a PGM collect alloy comprising PGM-containing wastes containing 30-95 wt.% Fe, 2-15 wt.% PGM and less than 1 wt.% S and a slag forming material comprising 40-90 wt.% Mg0 and/or Ca0 and 10-60 wt.% SiO2are melted to form a molten slag and a molten metal in a furnace. An oxidizing gas comprising oxygen is blown into the molten metal. The furnace is cooled to produce a solidified slag and a solidified metal comprising the PGM-enriched alloy which is then separated from the solidified slag. Date Recue/Date Received 2021-08-11
Process for spontaneous catalytic decomposition of hydrogen peroxide through the use of a fixed-bed catalyst, characterised in that the fixed-bed catalyst was produced through the use of at least one exothermic-decomposing platinum precursor.
C06D 5/04 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by auto-decomposition of single substances
B01J 8/02 - Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
C01B 5/02 - Heavy water; Preparation by chemical reaction of hydrogen isotopes or their compounds, e.g. 4ND3+7O2→ 4NO2+6D2O, 2D2+O2→ 2D2O
A process for the production of a PGM-enriched alloy comprising 0 to 60 wt.-% of iron and 20 to 99 wt.-% of one or more PGMs selected from the group consisting of platinum, palladium and rhodium, the process comprising the steps: (1) providing a sulfur-free PGM collector alloy comprising 30 to 95 wt.-% of iron and 2 to 15 wt- % of one or more PGMs selected from the group consisting of platinum, palladium and rhodium, (2) providing a copper- and sulfur-free material capable of forming a slag-like composition when molten, wherein the molten slag-like composition comprises 10 to 30 wt.-% of magnesium oxide and/or calcium oxide and 70 to 90 wt.-% of silicon dioxide, (3) melting the PGM collector alloy and the material capable of forming a slag-like composition when molten in a weight ratio of 1 : 0.75 to 5 within a converter until a multi- or two-phase system of a lower high-density molten mass comprising the molten PGM collector alloy and one or more upper low-density molten masses comprising the molten slag-like composition has formed, (4) contacting an oxidizing gas comprising 0 to 80 vol.-% of inert gas and 20 to 100 vol.-% of oxygen with the lower high-density molten mass obtained in step (3) until it has been converted into a lower high-density molten mass of the PGM-enriched alloy, (5) separating an upper low-density molten slag formed in the course of step (4) from the lower high-density molten mass of the PGM-enriched alloy making use of the difference in density, (6) letting the molten masses separated from one another cool down and solidify, and (7) collecting the solidified PGM-enriched alloy.
The invention relates to a method for breaking down fine iridium, having the following steps: (a) breaking down 1 wt.% of fine iridium in an alkalinically oxidizing manner with 3 to 20 wt.% of a combination of 40 to 70 wt.% of sodium hydroxide, 15 to 30 wt.% of sodium nitrate, and 10 to 40 wt.% of sodium peroxide in the melt, the sum of the weight percentages equaling 100 wt.%, (b) cooling down the broken down material formed in step (a) to 20 to 70 °C, (c) dissolving the acid-soluble components of the cooled broken down material in water/hydrohalic acid until an acidic aqueous solution with a pH value ranging from -1 to +1 is obtained, and (d) boiling down the acidic aqueous solution obtained in step (c) until the formation of nitrogen oxide gases has ended, wherein a step (e) of separating insoluble components from the acidic aqueous solution can be carried out prior to or after step (d) if required.
Method for removing noble metal from noble-metal-containing shaped catalyst bodies which comprise shaped bodies and noble metal, wherein the noble metal to be removed comprises at least one noble metal selected from the group consisting of Au, Ag, Pd, Pt, Ir, Rh, Ru, Os and Re, said method comprising the steps of (a) producing a mixture of noble-metal-containing shaped catalyst bodies in at least one, at least 1N mineral acid, (b) feeding inert or oxidizing gas into the mixture comprising noble-metal-containing shaped catalyst bodies and mineral acid, (c) introducing at least one oxidant in solid or liquid form into the mixture comprising noble-metal-containing shaped catalyst bodies and mineral acid, and (d) separating the shaped bodies from the liquid.
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