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A high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and its preparation method

A noble metal catalyst and catalytic oxidation technology, applied in the field of nanomaterials, can solve problems such as difficult to withstand high temperature sintering ability, difficult to prepare supported noble metal catalysts, etc.

Inactive Publication Date: 2021-04-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method has high universality, but it is difficult to form a long-term high-temperature sintering ability only by strong metal-support interaction, and the half-coating effect will inevitably affect the activity of the catalyst
To sum up, previous research results are difficult to prepare supported noble metal catalysts with high activity and high temperature sintering ability, especially in the CO catalytic oxidation reaction, the performance of the catalyst needs to be further improved

Method used

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  • A high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and its preparation method
  • A high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and its preparation method
  • A high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and its preparation method

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0027] The preparation method of the above-mentioned high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide comprises the following steps:

[0028] 1. Use deionized water to prepare the precursor of the active component noble metal (M) to 0.1mol L -1 508 μL of the solution was measured with a pipette and placed in a 100 mL beaker, and 40 mL of deionized water was added thereto, and stirred evenly. Use 0.1mol L - 1 NaOH solution to adjust the pH of the above solution to 9, and add 1g carrier TiO under stirring 2 , and with 0.1mol L -1 NaOH solution maintains the pH of the solution ≈ 9 and maintains it for 1h. Raise the temperature to 65°C, continue stirring for 1 h, stop stirring and centrifuge, wash the obtained product three times with deionized water, and dry it in an oven at 60°C for 24 h to obtain M / TiO 2 catalyst.

[0029] 2. Use a graduated cylinder to measure 40mL of absolute ethanol into a 100mL beaker, and add...

Embodiment 1

[0033] Example 1: SiO 2 / Au / TiO 2 catalyst

[0034] The active component Au precursor HAuCl was deionized water 4 ·3H 2 O prepared as 0.1mol L -1 508 μL of the solution was measured with a pipette and placed in a 100 mL beaker, and 40 mL of deionized water was added thereto, and stirred evenly. Use 0.1mol L -1 NaOH solution to adjust the pH of the above solution to 9, and add 1g carrier TiO under stirring 2 , and with 0.1mol L -1 NaOH solution maintains the pH of the solution ≈ 9 and maintains it for 1h. Raise the temperature to 65°C, continue stirring for 1 h, stop stirring and centrifuge, wash the obtained product three times with deionized water, and dry it in an oven at 60°C for 24 h to obtain Au / TiO 2 catalyst. Use a measuring cylinder to measure 40mL of absolute ethanol into a 100mL beaker, add 1mmol of n-dodecanethiol, 0.2g of Au / TiO 2 catalyst, heated to 60°C and kept stirring for 30min, centrifuged, washed with ethanol for 3 times, and dried in an oven at 60...

Embodiment 2

[0038] Example 2: SiO 2 / Pt / TiO 2 catalyst

[0039] The active component Au precursor H was deionized with deionized water 2 PtCI 6 ·6H 2 O prepared as 0.1mol L -1 508 μL of the solution was measured with a pipette and placed in a 100 mL beaker, and 40 mL of deionized water was added thereto, and stirred evenly. Use 0.1mol L -1 NaOH solution to adjust the pH of the above solution to 9, and add 1g carrier TiO under stirring 2 , and with 0.1mol L -1 NaOH solution maintains the pH of the solution ≈ 9 and maintains it for 1h. Raise the temperature to 65°C, continue stirring for 1 h, stop stirring and centrifuge, wash the obtained product three times with deionized water, and dry it in an oven at 60°C for 24 h to obtain Pt / TiO 2 catalyst. Use a graduated cylinder to measure 40mL of absolute ethanol into a 100mL beaker, and add 1mmol of oleyl ammonium, 0.2g of Pt / TiO 2 Catalyst, heated to 60°C and kept stirring for 30min, centrifuged, the obtained product was washed 3 tim...

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Abstract

The invention relates to a high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and a preparation method thereof. The catalyst is composed of a carrier, an active component and a coating shell layer, and the carrier is TiO 2 or CeO 2 Nanoparticles; the active component is a noble metal Au, Pt or Pd nanoparticle; the active component is loaded on the surface of the carrier; the surface of the carrier nanoparticle and the active component noble metal nanoparticle are coated with a cladding shell, The cladding shell is SiO 2 Shell. The method of the invention is simple, the conditions are mild, the cycle is short, the method is suitable for large-scale synthesis, and has little impact on the environment.

Description

technical field [0001] The invention relates to a high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and a preparation method thereof, belonging to the field of nanomaterials. Background technique [0002] Carbon monoxide (CO) is one of the common air pollutants, mainly from fossil fuel combustion, industrial waste gas and vehicle exhaust. There are many ways to eliminate CO, among which, the catalytic oxidation method is to oxidize CO under the action of a catalyst to generate pollution-free carbon dioxide (CO 2 ). This conversion method has the two advantages of low operating temperature and high conversion efficiency, and has little impact on the environment. It can not only be used for environmental protection, but also widely involved in energy, protection, industry and other fields, becoming the most important CO elimination method. Supported noble metal catalysts (including gold, silver, and platinum group m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/52B01J23/63B01J23/66B01D53/86B01D53/62
CPCB01D53/864B01J23/42B01J23/44B01J23/52B01J23/63B01J23/66Y02A50/20
Inventor 沈建华朱以华王浩凯伦郭峰潘钰
Owner EAST CHINA UNIV OF SCI & TECH
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