Cerium oxide supported bismuth nano catalyst as well as preparation method and application thereof

A cerium oxide and bismuth nanotechnology, which is applied in the field of cerium oxide-supported bismuth nanocatalyst and its preparation, can solve the problems of formic acid generation rate limitation, sensitivity to applied current density, complex formic acid, etc., achieve excellent stability, short synthesis time, good The effect of catalytic activity

Active Publication Date: 2019-12-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the synthesis of formic acid by traditional methods is complicated and not environmentally friendly, therefore, electrocatalytic reduction of CO 2 Formic acid production is a very promising approach
[0003] Currently, although some catalysts are effective in the electroreduction of CO 2 Higher selectivity and higher Faraday efficiency (Faradaic efficiency, FE) were achieved in the production of formic acid, but the FE of formic acid is very sensitive to the applied current density, which leads to the limitation of the generation rate of formic acid

Method used

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  • Cerium oxide supported bismuth nano catalyst as well as preparation method and application thereof
  • Cerium oxide supported bismuth nano catalyst as well as preparation method and application thereof
  • Cerium oxide supported bismuth nano catalyst as well as preparation method and application thereof

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Embodiment 1

[0039] This embodiment provides a cerium oxide-supported bismuth nanocatalyst and a preparation method thereof. Specifically, the preparation method of the cerium oxide-supported bismuth nanocatalyst includes the following steps:

[0040] (1) 1.5g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in ultrapure water and stirred evenly by ultrasonic waves to obtain solution A;

[0041] (2) Add 400 mg of NaBH to Solution A 4 , stirred evenly, carried out the reduction reaction for 40min, and obtained solution B;

[0042] (3) After the solution B is centrifuged, washed with water and washed with alcohol in sequence, and then dried at a temperature of 60°C, the carrier cerium oxide (CeO x );

[0043] (4) Place 400 mg of carrier cerium oxide in ultrapure water, and stir evenly with ultrasonic waves to obtain solution C, wherein the ultrasonic frequency is 40 kHz;

[0044] (5) Add 1.5g of Bi(NO 3 ) 3 ·5H 2 O, using ultrasonic stirring to obtain solution D, wherein the ultrasonic frequenc...

Embodiment 2

[0049] This embodiment provides a cerium oxide-supported bismuth nanocatalyst and a preparation method thereof. Specifically, the preparation method of the cerium oxide-supported bismuth nanocatalyst includes the following steps:

[0050] (1) 1g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in ultrapure water and stirred evenly by ultrasonic waves to obtain solution A;

[0051] (2) Add 100 mg of NaBH to Solution A 4 , stirred evenly, and carried out the reduction reaction for 10 minutes to obtain solution B;

[0052] (3) After the solution B is centrifuged, washed with water and washed with alcohol in sequence, and then dried at a temperature of 50°C, the carrier cerium oxide (CeO x );

[0053] (4) Place 100 mg of carrier cerium oxide in ultrapure water, and stir evenly with ultrasonic waves to obtain solution C;

[0054] (5) Add 0.5g of Bi(NO 3 ) 3 ·5H 2 O, using ultrasonic stirring to obtain solution D;

[0055] (6) 120mg of Na 2 CO 3 Dissolved in ultrapure water and stir...

Embodiment 3

[0059] This embodiment provides a cerium oxide-supported bismuth nanocatalyst and a preparation method thereof. Specifically, the preparation method of the cerium oxide-supported bismuth nanocatalyst includes the following steps:

[0060] (1) 2g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in ultrapure water and stirred evenly by ultrasonic waves to obtain solution A;

[0061] (2) Add 800 mg of NaBH to solution A 4 , stirred evenly, and carried out the reduction reaction for 60 minutes to obtain solution B;

[0062] (3) After the solution B is centrifuged, washed with water, and washed with alcohol in sequence, and then dried at a temperature of 70°C, the carrier cerium oxide (CeO x );

[0063] (4) Place 800 mg of carrier cerium oxide in ultrapure water, and stir evenly with ultrasonic waves to obtain solution C;

[0064] (5) Add 1.6g of Bi(NO 3 ) 3 ·5H 2 O, using ultrasonic stirring to obtain solution D;

[0065] (6) 640mg of Na 2 CO 3 Dissolved in ultrapure water and sti...

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Abstract

The invention discloses a cerium oxide supported bismuth nano catalyst as well as a preparation method and application thereof and belongs to the fields of catalyst techniques and sustainable development of energy. The preparation method comprises the following steps: by using a one-step reduction method, preparing a carrier cerium oxide at the room temperature; and mixing the carrier cerium oxidewith Bi(NO3)3*5H2O, and performing steps of centrifugation, drying and calcining, so as to obtain the cerium oxide supported bismuth nano catalyst. According to the cerium oxide supported bismuth nano catalyst, massive pores inside cerium oxide are sufficiently utilized and combined with bismuth nanoparticles, so that the number of active sites can be increased, and the activity of the catalyst can be remarkably improved. Particularly, in formic acid production from CO2 through electrochemical reaction, the cerium oxide supported bismuth nano catalyst has very good catalysis activity and excellent stability.

Description

technical field [0001] The invention relates to the field of catalyst technology and energy sustainable development, in particular to a cerium oxide-supported bismuth nanocatalyst and a preparation method and application thereof. Background technique [0002] As the demand for energy increases, the CO in the atmosphere rises sharply 2 The climate warming and ecological problems caused by the high content of carbon dioxide have become severe challenges to the sustainable development of human beings. Therefore, for CO 2 It is of great significance to make effective use and transform it into green resources. Among them, the electrocatalytic reduction of CO 2 , can effectively utilize renewable electric energy (solar energy, wind energy, etc.), and thus has received extensive attention from researchers. In numerous CO 2 Among the reduction products, formic acid, as a product with high added value, can not only be used in medicine, tanning and textile industries, but also be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C25B3/04C25B11/06C25B3/25
CPCB01J23/18B01J35/0033C25B3/25C25B11/095
Inventor 鄢俊敏段焱鑫姚佳欣康霞张野高蕊俞珍王达年刘冬雪
Owner JILIN UNIV
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