38results about How to "Excellent redox stability" patented technology

An object of the invention is to provide a charge transporting material having an excellent heat resistance, excellent filming properties, an excellent charge transporting ability, and excellent light-emitting characteristics and, also, to provide an organic electroluminescent element providing a high luminance and a highly luminous efficiency and having a long life. The invention relates to a charge transporting material comprising a compound having within the molecule two or more pyridine rings substituted at 2-, 4- and 6-positions thereof, which rings do not substantially conjugate each other (provided that the 3- and 5-positions of the pyridine rings may be substituted) and an organic electroluminescent element using the charge transporting material.

A ceramic anode structure obtainable by a process comprising the steps of: (a) providing a slurry by dispersing a powder of an electronically conductive phase and by adding a binder to the dispersion, in which said powder is selected from the group consisting of niobium-doped strontium titanate, vanadium-doped strontium titanate, tantalum-doped strontium titanate, and mixtures thereof, (b) sintering the slurry of step (a), (c) providing a precursor solution of ceria, said solution containing a solvent and a surfactant, (d) impregnating the resulting sintered structure of step (b) with the precursor solution of step (c), (e) subjecting the resulting structure of step (d) to calcination, and (f) conducting steps (d)-(e) at least once.

The disclosure provides a double-layer anode structure on a pretreated porous metal substrate and a method for fabricating the same, for improving the redox stability and decreasing the anode polarization resistance of a SOFC. The anode structure comprises: a porous metal substrate of high gas permeability; a first porous anode functional layer, formed on the porous metal substrate by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying process; and a second porous anode functional layer, formed on the first porous anode functional layer by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying and hydrogen reduction. The first porous anode functional layer is composed a redox stable perovskite, the second porous anode functional layer is composed of a nanostructured cermet. The first porous anode functional layer is also used to prevent the second porous anode functional layer from being diffused by the composition elements of the porous metal substrate.

This invention relates to a silane-resin composition that can be obtained by at least partial hydrolytic condensation of at least the following components: (1) one or more sulfonic acid group-containing silane(s) with at least one group that can be cleaved under hydrolytic conditions, (2) one or more styryl-functionalized silane(s) and (3) one or more silane(s) that carry a nitrogen-containing heterocyclic compound, an amine group or a sulfonamide group with at least one group that can be cleaved under hydrolytic conditions, and mixing of the components before, during or after the hydrolytic condensation, as well as a process for the production of this composition. With the silane resin that is obtained, proton-conductive, organically cross-linked heteropolysiloxanes can be produced that are suitable for PEMFC in a layer or membrane form as proton-conductive systems. Their proton conductivity can be further increased by the addition of suitable liquids.

The present disclosure describes zero-platinum group metals (ZPGM) material compositions including binary Cu—Mn spinel oxide powders having stable reduction/oxidation (redox) reversibility useful for TWC and oxygen storage material applications. The behavior of Cu—Mn spinel oxide powder is analyzed under oxidation-reduction environments to determine redox reversibility, catalytic activity, and spinel structure stability. Characterization of spinel powder is performed employing X-ray diffraction analysis, hydrogen temperature-programmed reduction technique, transmission electron microscopy analysis, and X-ray photoelectron spectroscopy analysis. Test results confirm the phase and structural stability of the Cu—Mn spinel oxide during redox reaction, thereby indicating that the Cu—Mn spinel oxide can be employed in a plurality of TWC applications.

The invention relates to a catalyst for alkane ammoxidation, which mainly aims at solving the problems of bad stability of the catalyst caused by that stibium requires circumfluence and Te is easy to volatilize in the prior art. Carrier containing silicon dioxide and atomic ratio are adopted to calculate the composition of general formula as MoVaNbbTecDdOx, wherein, D is at least one kind, which is selected from Sn, Ti, Fe, Bi, Sb or W; the preparation environment is changed by adjusting pH value by adding with acid in the process of preparation. Firstly the corresponding salt or oxide of Mo and Te is dissolved, then the solution of the corresponding salt or oxide of V and Nb is respectively added and acid with required amount is added for adjusting the pH value of the mixed solution, and at last silicasol with the required amount is added for preparing the catalyst. The technical proposal better solves the problems. The catalyst of the invention has the advantages of excellent stability of oxidation and reduction, low reaction temperature, clean reaction product and being capable of keeping higher yield for a long time, thus being suitable for preparing unsaturated nitriles with alkane ammoxidation in industrial production.

The invention relates to an oxidation reaction catalyst of telluriferous alkane ammonia, which comprises a silicon dioxide carrier and a combination which is calculated according to the atomic ratio and comprises the following general formula: MovaNbbTecDdOx, wherein D is at least one selected form Sn, Ti, Fe, Bi, Sb or W. The oxidation reaction catalyst mainly solves the problems that Te is easy to volatilize, the preparation technology is complex, the preparation environment is unstable, and the active component of the catalyst is easy to volatilize, thereby resulting in bad stability of the catalyst in the prior art; and the oxidation reaction catalyst better solves the problems through adopting the technical proposal that Mo-V-Nb-Te base is used as the main component, the hydrothermal synthesis method is adopted, the preparation environment is changed through adding reducing agent and acid during the preparation process, that is, firstly the solution of the corresponding salt or the corresponding oxide compound of Mo and Te is mixed with the solution of the corresponding salt or the corresponding oxide compound of V and Nb, then a specified volume of reducing agent and acid are added to adjust the pH value, and hydrothermal treatment is performed to the uniformly mixed solution. The catalyst has the advantages that the catalyst has good oxidation reduction stability, the reaction temperature is low, the reaction product is clean, and high yield coefficient can be kept for a long time, and the catalyst can be applied to the industrial production for the preparation of the unsaturated acid nitrile in the alkane ammonia oxidation reaction.

The invention belongs to the field of electrochemical investigation, and specifically provides a low temperature electrolyte using ethyl acetate as a solvent. The low temperature electrolyte uses the ethyl acetate and derivate organic solvent as the solvent, and uses lithium salts, sodium salts or quaternary ammonium salts as a solute, and also comprises additives. The ethyl acetate has a very low melting point, and is still liquid in the low temperature environment of -83 DEG C. Compared with the traditional electrolyte, the low temperature electrolyte provided by the invention still has a high ionic conductivity at a low temperature of -80 DEG C. By applying the electrolyte provided by the invention to a lithium ion battery, a sodium-ion battery, a supercapacitor or a mixed type supercapacitor, the system is excellent in specific capacity, cycle performance and power performance.

The invention relates to a catalyst containing rare earth for the ammoxidation of alkane, which contains a silicon dioxide carrier and a composition comprising the following general formula in atomic ratio: MoVaNbbTecDdEeOx, wherein D is selected from at least one of rare earth elements; and E is selected from one and a mixture of Ca, Sn, Ti, Fe, Bi, Sb or W. The invention mainly solves the problems of easily volatile Te, complex preparation process, instable preparation environment and poor catalyst stability caused by easily volatile active components of the catalyst existing in the prior art. In the invention, Mo-V-Nb-Te base is used as a main component of the catalyst, and a reducing agent and acid are added during preparation to change the preparation environment, i.e. the preparation process comprises the following steps of: firstly, dissolving corresponding salts or oxides of Mo and Te; then, respectively adding solutions of the corresponding salts or oxides of V, Nb and rare earth elements; subsequently, adding a certain amount of reducing agent and acid to regulate the pH value; and finally, adding a certain amount of silica sol. The catalyst has excellent oxidation reduction stability, low reaction temperature and high product yield, and can be applied to the industrial production of preparing unsaturated nitriles by the ammoxidation of the alkane.

The invention relates to a method for preparing an antimony-containing catalyst used for ammoxidation of alkane, which mainly solves the problem of poor stability of the catalyst due to difficult stable combination between Sb and Mo, complex preparation process, unstable preparation environment and easy volatilization of active ingredients of the catalyst existing in the prior art. In the method, the Mo-V-Nb-Sb base is used as a main ingredient of the catalyst, and a silica carrier and a composition including the MoVaNbbSbcDdOx general formula based on an atomic ratio are contained, wherein D is one of Sn, Ti, Fe, Bi, Te and W. The preparation environment is changed by dissolving corresponding salts or oxides of Mo and Sb; then respectively adding the solution of the corresponding salts or the oxides of V and Nb into the mixture; adding a proper amount of reducing agent into the mixture; and finally adding silica sol into the mixture. The technical scheme adopting a two-stage calcination mode can better solve the problem. The method can be applied to industrial production of unsaturated nitriles by using ammoxidation of alkane.

The invention provides a catalyst for ammoxidation of alkanes. The catalyst contains silicon dioxide carrier and a composite compound of the following formula in atomic ratio: MoVaNbTe<c>DdOx, wherein D is at least one selected from Sn, Ti, Fe, Bi, Sb and W. The catalyst mainly solves the problems of volatilization loss of Te, complicated preparation process, unstable production environment and poor catalyst stability due to volatilization of active components of the catalyst. In order to solve the problems in the prior art, the technical scheme is as follows: the catalyst contains a Mo-V-Nb-Te group as a major component; and a reducer is added in the preparation process to change the preparation environment, that is, the salts or the oxides of Mo and Te are dissolved firstly, then the salts or the oxides of V and Nb are added in the resulting solution, the required amount of the reducer is added to adjust the oxidation state, and finally the required amount of the silica sol is added. The catalyst has the advantages of excellent oxidation-reduction stability, low reaction temperature, clean reaction product and high yield, and is applied to the industrial production of unsaturated nitrile via ammoxidation of alkanes.