Method for preparing supported platinum group catalyst by using laser

A catalyst and supported technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as insufficient coupling between platinum group metal nanoparticles and metal oxide carriers

Pending Publication Date: 2022-04-15
海南锋测生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of platinum group metal aggregation and insufficient coupling between platinum group metal nanoparticles and metal oxide carriers in the prior art, and can be used for chemical processes such as oxidation of carbon monoxide and nitrogen monoxide, hydrogenation of organic matter, etc., described in this patent as Carbon monoxide oxygen to carbon dioxide conversion in catalytic combustion of soot in a diesel vehicle exhaust atmosphere and the use of ceria as a catalyst support as an example to conclude this method, other platinum group metal catalyzed chemical processes and other metal oxide supports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 2.77g of cerium ammonium nitrate and 15m1 of water in a 200ml beaker, stir to dissolve, then add 2.836g of citric acid under stirring at room temperature, add 0.3g of polyethylene glycol with a molecular weight of 400 after dissolving, after the dropwise addition, Heat and stir at 80°C until the water evaporates to produce a viscous colloid. Then dry the obtained colloid in air atmosphere at 110°C for 12 hours, take it out and grind it finely, pre-calcine at 300°C for 1 hour, calcined at 500°C for 3 hours, and cool in the furnace to obtain cerium oxide. Take 0.24 lg of chloroplatinic acid, dissolve in 0.9 g deionized water. Add the prepared 1.5g of ceria into the chloroplatinic acid solution, stir evenly, heat and dry at 110°C for 3 hours, calcinate at 50°C for 1 hour, and cool in the furnace to prepare a platinum-supported cerium-based oxide catalyst precursor . The prepared precursor was sandwiched between two glass slides with a distance of 10 μm, and focused w...

Embodiment 2

[0029] Add 2.77g of cerium ammonium nitrate and 15m1 of water in a 200ml beaker, stir to dissolve, then add 2.836g of citric acid under stirring at room temperature, add 0.3g of polyethylene glycol with a molecular weight of 400 after dissolving, after the dropwise addition, Heat and stir at 80°C until the water evaporates to produce a viscous colloid. Then dry the obtained colloid in air atmosphere at 110°C for 12 hours, take it out and grind it finely, pre-calcine at 300°C for 1 hour, calcined at 500°C for 3 hours, and cool in the furnace to obtain cerium oxide. Take 0.24 lg of chloroplatinic acid, dissolve in 0.9 g deionized water. Add the prepared 1.5g of cerium oxide into the chloroplatinic acid solution, stir evenly, heat and dry at 110°C for 3 hours, calcinate at 50°C for 1 hour, and cool in the furnace to prepare a platinum-supported cerium-based oxide catalyst precursor. body. The prepared precursor was sandwiched between two glass slides with a distance of 10 μm, a...

Embodiment 3

[0031]Add 2.77g of cerium ammonium nitrate and 15m1 of water in a 200ml beaker, stir to dissolve, then add 2.836g of citric acid under stirring at room temperature, add 0.3g of polyethylene glycol with a molecular weight of 400 after dissolving, after the dropwise addition, Heat and stir at 80°C until the water evaporates to produce a viscous colloid. Then dry the obtained colloid in air atmosphere at 110°C for 12 hours, take it out and grind it finely, pre-calcine at 300°C for 1 hour, calcined at 500°C for 3 hours, and cool in the furnace to obtain cerium oxide. Take 0.24 lg of chloroplatinic acid, dissolve in 0.9 g deionized water. Add the prepared 1.5g of cerium oxide into the chloroplatinic acid solution, stir evenly, heat and dry at 110°C for 3 hours, calcinate at 50°C for 1 hour, and cool in the furnace to prepare a platinum-supported cerium-based oxide catalyst precursor. body. The prepared precursor was sandwiched between two glass slides with a distance of 10 μm, an...

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PUM

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Abstract

The invention provides a method for preparing a supported platinum group catalyst with a metal oxide as a carrier by laser heating. The catalyst is prepared by processing the supported platinum group catalyst precursor with laser, the interaction between the metal organic framework and platinum is tighter after laser irradiation, the spatial distribution is more uniform, and the method solves the problems of aggregation of platinum group metals and weak interaction between platinum group metal nanoparticles and a metal oxide carrier in the prior art. The catalytic effect and stability of the catalyst are improved, and the catalytic effect of chemical processes such as oxidation of carbon monoxide and nitric oxide and hydrogenation of organic matters can be improved.

Description

technical field [0001] The invention belongs to the field of catalyst synthesis. Specifically, the present invention relates to a preparation method of a supported platinum group catalyst Background technique [0002] Platinum group metals are expensive but essential catalysts in many important reactions. They can catalyze the oxidation of CO and NO, dehydrogenation and electrolysis of water. They are often used in exhaust gas purification, fuel cells, petroleum refining, organic synthesis and hydrogen production. . Reducing the size of platinum group metal catalysts to the nanoscale can effectively reduce the use of Pt to reduce costs, while increasing the surface area of ​​active catalysts to double their catalytic efficiency. However, under practical conditions, due to the high surface energy drive of metal nanoparticles and the Ostwald ripening effect, nanoscale and atomic-scale PGM catalysts will undergo severe aggregation and degradation. [0003] In practical appli...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J37/34
Inventor 王龙元
Owner 海南锋测生物科技有限公司
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