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Method for preparing titanium oxide micro-nano array supported monoatomic platinum catalyst

A nano-array, platinum catalyst technology, applied in the field of materials, can solve the problem of reducing the catalytic activity of the platinum utilization rate catalyst, and achieve the effects of suppressing local unevenness, uniform heating, and uniform dispersion

Inactive Publication Date: 2019-01-15
福建龙新三维阵列科技有限公司
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Problems solved by technology

Under such conditions, the platinum precursor solution tends to flow toward the two ends of the substrate pores where the drying rate is faster, and as a result, most of the platinum will accumulate at both ends of the substrate, making it difficult to form single-atom platinum dispersion, thereby seriously reducing the Overall platinum utilization and catalytic activity of the resulting catalysts

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  • Method for preparing titanium oxide micro-nano array supported monoatomic platinum catalyst
  • Method for preparing titanium oxide micro-nano array supported monoatomic platinum catalyst

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Embodiment 1

[0025] The first step: hydrothermal growth of rutile-titanium oxide nanoarrays on a honeycomb ceramic substrate. After the cordierite honeycomb substrate is loaded with titanium oxide seed crystals, it is immersed in the titanium oxide growth solution as a whole, and sealed in a high-pressure reactor for high-temperature hydrothermal growth. The titanium oxide growth solution is generally prepared by mixing the organic precursor of titanium oxide, hydrochloric acid, and organic solvents (toluene, ethyl ketone, n-hexane).

[0026] The second step: the impregnation of the nano-array integrated honeycomb ceramics in the platinum active precursor. After hydrothermal growth, the honeycomb ceramics integrated with titanium oxide nanoarrays underwent a series of cleaning and drying, and then were immersed in a certain concentration of platinum active precursor aqueous solution, and the solution and the substrate were placed in an ultrasonic device for one minute to exclude the nanoar...

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Abstract

The invention discloses a method for preparing a titanium oxide micro-nano array supported monoatomic platinum catalyst. The method comprises the following steps: step 1, hydrothermal growth of rutiletitanium oxide nano-array on a honeycomb ceramic substrate; step 2, impregnation of the nano-array integrated honeycomb ceramic in a platinum active precursor; step 3, removal of an excess solution;step 4, microwave radiation heating and drying; and step 5, high-temperature calcination. According to the invention, the titanium oxide micro-nano array supported monoatomic platinum catalyst can beprepared on a large scale by using a microwave radiation-assisted impregnation-process needle. Moreover, the method of the invention differs from conventional incipient-wetness impregnation for depositing monoatomic platinum through heating via an oven. The deposition of monoatomic platinum on the surface of a nano-array can be shortened to a few minutes by using microwave radiation heating instead of oven heating.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing a monoatomic platinum catalyst supported by a titania micro-nano array. Background technique [0002] Due to their high catalytic activity and selectivity for various important chemical reactions, supported noble metal catalysts have been widely used in energy and environmental protection related industries such as photocatalysis, electrocatalysis, and tail gas treatment. Generally, the reactivity of supported noble metal catalysts is directly related to the degree of dispersion of noble metals on the carrier. The fine dispersion of noble metals on support materials with high specific surface area can greatly increase the number of active sites for catalytic reactions, thereby increasing the overall activity of the catalyst. Therefore, the particle size of platinum particles on the support material is very important for the catalytic performance of suppo...

Claims

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Application Information

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IPC IPC(8): B01J23/42
CPCB01J23/42
Inventor 唐文翔王思博郭彦炳高普献陈松华
Owner 福建龙新三维阵列科技有限公司
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