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Supported copper-cerium catalyst for selective oxidation of CO and preparation method of supported copper-cerium catalyst

A catalyst, copper-cerium technology, applied in the field of supported copper-cerium catalyst, can solve the problems of large-scale application limitation, lack of resources, high price, etc., to avoid the loss of species, the method is simple and fast, and the effect of less pollution

Inactive Publication Date: 2013-04-03
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts have the advantages of good low-temperature activity, but they are expensive, lack of resources, and large-scale applications are limited

Method used

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  • Supported copper-cerium catalyst for selective oxidation of CO and preparation method of supported copper-cerium catalyst
  • Supported copper-cerium catalyst for selective oxidation of CO and preparation method of supported copper-cerium catalyst
  • Supported copper-cerium catalyst for selective oxidation of CO and preparation method of supported copper-cerium catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation of embodiment 1.SBA-15

[0020] 2g P123 (polyoxyethylene ether-polyoxypropylene ether-polyoxyethylene ether triblock copolymer, number average molecular weight 5800) was dissolved in 60g of 2M HCl and 15g H 2 O, stirred and dissolved, then added 4.25g tetraethyl orthosilicate, reacted at 40°C for 24h, and then hydrothermally reacted at 100°C for 24h. The obtained sample was filtered, washed, and calcined in air at 550°C for 5 hours to obtain the mesoporous material SBA-15.

Embodiment 2

[0021] The preparation of embodiment 2.SBA-15 supported copper cerium catalyst

[0022] Accurately weigh SBA-15 (0.342 g), cerous nitrate (0.086 g) and copper nitrate (0.0103 g), put them in a mortar, grind them for 10 min, transfer them to a crucible, and bake them at 450 ° C under air atmosphere Cool down naturally after 4h to get the SBA-15 supported copper cerium catalyst (CuO-CeO 2 / SBA-15). Wherein the mass percentage of cerium oxide is 11%, and the mass percentage of copper oxide is 1%.

Embodiment 3

[0023] The preparation of embodiment 3.SBA-15 supported copper cerium catalyst

[0024] Accurately weigh SBA-15 (0.34 g) and cerous nitrate (0.154 g), weigh 0.0515 g of copper nitrate, put each portion of copper nitrate in a mortar with SBA-15 and cerous nitrate respectively, grind for 10 minutes and transfer to Put it into a crucible, bake it at 450°C for 4 hours in an air atmosphere, and then cool down naturally to get the SBA-15 supported copper-cerium catalyst (CuO-CeO 2 / SBA-15). Wherein the mass percentage of cerium oxide is 20%, and the mass percentage of copper oxide is 5%.

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Abstract

The invention provides a preparation method of a supported copper-cerium catalyst for selective oxidation of CO. The preparation method comprises the following steps in sequence: getting SBA-15 as a support; feeding a certain amount of copper nitrate and cerium nitrate into a mortar together with the support; grinding for a certain time; roasting for 4 hours at 450 DEG C in air atmosphere; and naturally cooling to obtain the SBA-15 supported copper-cerium catalyst. The catalyst shows activity in the selective oxidation of CO greater than that of the catalyst prepared by conventional dipping method. The preparation method has the advantages that no solvent is adopted in the whole preparation, the operation is simple, convenient and quick, and the copper species and CeO2 can be able to be greatly dispersed in the SBA-15; and furthermore, a copper salt precursor and a cerium salt precursor can be highly and directly contacted during preparing because of no solvent, so that the catalyst in which the copper oxide and the cerium dioxide are closely contacted can be gained. The whole preparation in the method is characterized in low energy consumption and simple equipment.

Description

Technical field: [0001] The invention relates to a supported copper-cerium catalyst for selective oxidation of CO and a preparation method thereof. Background technique: [0002] With the rapid development of my country's economy, the demand for energy has become increasingly strong. Due to the limited reserves of traditional fuels such as coal, oil and natural gas, and the use of these fossil fuels will bring many environmental problems. Therefore, more and more attention is devoted to the development of clean and efficient new energy sources. As a power generation device that efficiently and environmentally friendly converts chemical energy stored in fuel and oxidant into electrical energy under isothermal conditions, fuel cell is a green energy technology that can simultaneously solve the two major problems of energy saving and environmental protection. Considered the most promising power plant. Among them, the proton exchange membrane fuel cell (PEMFC) is favored by p...

Claims

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Application Information

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IPC IPC(8): B01J29/035
Inventor 董林汤常金孙敬方高飞
Owner NANJING UNIV