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Solid supported noble metal catalyst and its preparing method

A precious metal catalyst, supported technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc. and other problems, to achieve the effect of short process, simple process and improved utilization rate

Inactive Publication Date: 2003-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation cost is high, the technological process is complicated, and the process is not easy to control.
The disadvantage of this method is that formaldehyde needs to be used as a reducing agent, and formaldehyde is very harmful to the human body.

Method used

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  • Solid supported noble metal catalyst and its preparing method
  • Solid supported noble metal catalyst and its preparing method
  • Solid supported noble metal catalyst and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: 1 gram of chloroplatinic acid hexahydrate is dissolved in the mixed solvent that 100 milliliters of ethanol, 300 milliliters of ethylene glycol and 100 milliliters of water form, stir well, add 0.25mol / L NaOH aqueous solution 50 milliliters, in protective Heated to 250°C under atmosphere, kept for 30 minutes, added 3.4 grams of Black Pearls charcoal dispersed in water, and after cooling down to room temperature, added a settling accelerator, stirred for 30 minutes, filtered, washed with water, and dried at 80°C for 6 hours to obtain a platinum content of 3.8 grams of 10% carbon-supported platinum catalyst.

Embodiment 2

[0041]Embodiment 2: 1 gram of ruthenium trichloride trihydrate is dissolved in the mixed solvent that 100 milliliters of ethanol, 300 milliliters of ethylene glycol and 100 milliliters of water form, stir well, then add 50 milliliters of 0.25mol / L NaOH aqueous solution, then Heat to 180°C under a protective atmosphere, keep it for 30 minutes, add 3.4 grams of XC-72R carbon dispersed in water, after cooling down to room temperature, add a settling accelerator, stir for 30 minutes, filter, wash with water, and dry at 80°C for 6 hours. 3.7 g of a carbon-supported ruthenium catalyst containing 10% ruthenium was obtained.

Embodiment 3

[0042] Embodiment 3: 1 gram of rhodium trichloride trihydrate is dissolved in the mixed solvent of 250 milliliters of ethylene glycol and 250 milliliters of water, stir well, add 25 milliliters of 0.25mol / L NaOH aqueous solution, then in protective atmosphere Heating to 120°C for 30 minutes, adding 3.6 grams of coconut shell charcoal dispersed in water, after cooling down to room temperature, adding a settling agent, stirring for 30 minutes, filtering, washing with water, and drying at 80°C for 6 hours to obtain a rhodium content of 3.9 grams of 10% carbon-supported rhodium catalyst.

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Abstract

The supported noble metal catalyst has any one of Ru, Rh, Pd, Os, Ir, Pt, Au, Ag, Cu and Ni as the active component; and any one of active carbon, graphite, carbon nanotube, Al2O3, SiO2, molecular sieve, MgO and TiO2 as the carrier. Its active component accounts for 0.1-90 % and metal particle size of 0.5-6 nm. The preparation process includes dispersing the active component, hydroxide or carbonate of alkali metal or alkali earth metal and carrier in solvent separately; mixing in certain proportion, heating the solution, adding nitric acid, sulfuric acid, hydrochloric acid, oxalic acid or acetic acid as precipitation promoter; and stoving. The catalyst is used as catalyst for fuel cell and makes the fuel cell possess high performance.

Description

technical field [0001] The invention relates to a supported noble metal catalyst and a preparation method of the catalyst. Background technique [0002] Supported noble metal catalysts have been widely used as fuel cell electrode catalysts, hydrogenation, dehydrogenation reactions and a few oxidation reaction catalysts. Due to the high price of platinum and the scarcity of resources. Therefore, appropriate preparation methods and process conditions must be adopted to reduce the particle size of platinum metal, increase the dispersion of platinum on carbon, and improve the activity and utilization of catalysts, especially for high-load supported noble metal catalysts. [0003] In recent years, many researchers at home and abroad have tried various methods to prepare supported noble metal catalysts: [0004] Document [1] (Henry G.Petrow, US 3992331) introduced a method for preparing a highly dispersed activated carbon-supported platinum catalyst. The method first prepares c...

Claims

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Application Information

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IPC IPC(8): B01J23/38B01J37/03
Inventor 辛勤周振华周卫江孙公权李文震王素力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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