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porous cu-ce-o x Solid solution catalyst and its preparation method and application

A cu-ce-ox, catalyst technology, applied in the field of porous Cu-Ce-Ox solid solution catalyst and its preparation, can solve the problems of poor thermal stability, large grain size, low activity, etc., and achieves continuously adjustable ratio, high The effect of anti-sintering ability and simple and easy preparation method

Active Publication Date: 2022-06-07
ANHUI NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of porous Cu-Ce-O x The solid solution catalyst and its preparation method and application solve the problems of poor thermal stability, large grain size, low specific surface area, limited exposure of active sites and low activity of traditional Cu-based oxide catalysts

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  • porous cu-ce-o <sub>x</sub> Solid solution catalyst and its preparation method and application
  • porous cu-ce-o <sub>x</sub> Solid solution catalyst and its preparation method and application
  • porous cu-ce-o <sub>x</sub> Solid solution catalyst and its preparation method and application

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preparation example Construction

[0020] The present invention provides a porous Cu-Ce-O x Method of preparation of a solid solution catalyst, the preparation method comprising:

[0021] (1) Will Cu (NO 3 ) 2 ·3H 2 O、Ce(NO 3 ) 3 ·6H 2O, Poloxamer F127 and water mixed to give mixed liquid A;

[0022] (2) The mixture A is treated by ultrasonic spray heat decomposition to obtain a precursor powder;

[0023] (3) The precursor powder is calcined at high temperature, and then treated with concentrated ammonia water to obtain the catalyst.

[0024] In one preferred embodiment of the present invention, in order to make the resulting catalyst particle unit size is smaller, higher than the surface area, improve its thermal stability and catalytic activity, Cu (NO 3 ) 2 ·3H 2 O、Ce(NO 3 ) 3 ·6H 2 O, Poloxamer F127 and water according to the mass ratio of 0.03 ~ 1.3: 7: 2.5: 200 to mix.

[0025] In one preferred embodiment of the present invention, in order to make the particle unit size of the prepared catalyst smaller, highe...

Embodiment 1

[0035] Place Cu(NO 3 ) 2 ·3H 2 O、Ce(NO 3 ) 3 ·6H 2 O, Poloxamer F127 and water are mixed according to the mass ratio of 1:7:2.5:200 to obtain mixed liquid A; the mixture A is ultrasonically atomized, and then heated in a tube furnace (temperature is 600 °C, time is 4s) to obtain a precursor powder; The precursor powder was calcined at high temperature (temperature of 400 °C, time 2h), and then treated with concentrated ammonia water (immersed in concentrated ammonia water at 50 °C for 60 min) to obtain the catalyst; Compared with 1 g of precursor powder, the dosage of concentrated ammonia water is 10 mL.

Embodiment 2

[0037] Place Cu(NO 3 ) 2 ·3H 2 O、Ce(NO 3 ) 3 ·6H 2 O, Polosham F127 and water are mixed according to the mass ratio of 3:7:2.5:200 to obtain mixed liquid A; the mixture A is ultrasonically atomized, and then introduced into the tube furnace for heating (temperature is 600 °C, time is 4s) to obtain the precursor powder; The precursor powder was calcined at high temperature (temperature of 400 °C, time 2h), and then treated with concentrated ammonia water (immersed in concentrated ammonia water at 50 °C for 60 min) to obtain the catalyst; Compared to 1 g of precursor powder, the amount of concentrated ammonia water is 10mL.

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Abstract

The invention discloses a porous Cu-Ce-O x Solid solution catalyst and its preparation method and application, described preparation method comprises: Cu(NO 3 ) 2 ·3H 2 O, Ce(NO 3 ) 3 ·6H 2 O. Poloxamer F127 is mixed with water to obtain a mixed solution A; the mixed solution A is subjected to ultrasonic spray thermal decomposition treatment to obtain a precursor powder; the precursor powder is calcined at a high temperature, and then treated with concentrated ammonia water to obtain the catalyst ; solve the problems of poor thermal stability, large grain size, low specific surface area, limited exposure of active sites and low activity of traditional Cu-based oxide catalysts.

Description

Technical field [0001] The present invention relates to the field of catalysts, in particular, to a porous Cu-Ce-O x Solid solution catalyst and preparation method and application thereof. Background [0002] Low-temperature oxidation of CO is an important part of processes such as automotive exhaust control and hydrogen purification of proton exchange membrane fuel cells (PEMFCs). For example, the "150°C Challenge" requires CO and NO in the exhaust of automobiles at 150°C x and other pollutants reach 90% conversion. For another example, the hydrogen source of PEMFCs is industrial hydrogen, which contains trace amounts of CO that can cause poisoning of the battery stack catalyst, so it is necessary to completely remove H at a lower operating temperature of PEMFCs 80~120 °C 2 Trace amounts of CO in fuel. At present, the catalyst for low-temperature catalytic oxidation of CO is mainly precious metal components such as Pt, Pd and Au supported by metal oxides. However, limited crusta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10B01D53/62B01D53/86
CPCB01J23/83B01D53/62B01D53/864B01J35/60B01J35/615Y02A50/20
Inventor 耿竞蒯龙耿保友
Owner ANHUI NORMAL UNIV
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