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A kind of perovskite carbon dioxide electroreduction catalyst and preparation method thereof

A perovskite type, carbon dioxide technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as inappropriateness, achieve lower levels, lower The effect of simple cost and preparation method

Active Publication Date: 2022-08-02
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still relatively few studies in this area
One of the possible reasons is that most of the common Fe, Co, and Ni-based perovskites have good activity for hydrogen evolution reaction, a side reaction of CO2 reduction, making them unsuitable as CO2 reduction catalysts.

Method used

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  • A kind of perovskite carbon dioxide electroreduction catalyst and preparation method thereof
  • A kind of perovskite carbon dioxide electroreduction catalyst and preparation method thereof
  • A kind of perovskite carbon dioxide electroreduction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 (La 0.8 Sr 0.2 ) 0.95 Ag 0.05 MnO 3 Preparation of catalyst

[0040] Weigh 3.291g La (NO 3 ) 3 ·6H 2 O, 0.402g Sr(NO 3 ) 2 , 0.085g AgNO 3 , 2.451g of manganese acetate tetrahydrate and 8.5g of citric acid monohydrate, pour them into a beaker, and add an appropriate amount of deionized water to stir on a magnetic stirring table to mix them evenly until clear. 5.85g of ethylenediaminetetraacetic acid and 20mL of ammonia water were mixed into a clear solution and poured into the beaker described above to prepare a precursor solution. The solution was heated with continuous stirring at 90°C-100°C until the solution turned into a gel. The gelatinous mixture was sent to a 200°C electric blast drying oven for drying for 8 hours to obtain a black fluffy solid precursor. A part of the precursor was taken and placed in a tube furnace, an oxygen atmosphere was introduced, the temperature was raised to 800°C at a heating rate of 5°C / min and kept for 5h. Afte...

Embodiment 2

[0041] Example 2 (La 0.8 Sr 0.2 ) 0.97 Ag 0.03 MnO 3 Preparation of catalyst

[0042] Weigh 3.361g La (NO 3 ) 3 ·6H 2 O, 0.411g Sr(NO 3 ) 2 , 0.051g AgNO 3 , 2.451g of manganese acetate tetrahydrate and 8.5g of citric acid monohydrate, pour them into a beaker, and add an appropriate amount of deionized water to stir on a magnetic stirring table to mix them evenly until clear. 5.85g of ethylenediaminetetraacetic acid and 20mL of ammonia water were mixed into a clear solution and poured into the beaker described above to prepare a precursor solution. The solution was heated with continuous stirring at 90°C-100°C until the solution turned into a gel. The gelatinous mixture was sent to a 200°C electric blast drying oven for drying for 8 hours to obtain a black fluffy solid precursor. A part of the precursor was taken and placed in a tube furnace, an oxygen atmosphere was introduced, the temperature was raised to 800°C at a heating rate of 5°C / min and kept for 5h. Afte...

Embodiment 3

[0043] Example 3 (La 0.8 Sr 0.2 ) 0.9 Ag 0.1 MnO 3 Preparation of catalyst

[0044] Weigh 3.118g La (NO 3 ) 3 ·6H 2 O, 0.381g Sr(NO 3 ) 2 , 0.170g AgNO 3 , 2.451g of manganese acetate tetrahydrate and 8.5g of citric acid monohydrate, pour them into a beaker, and add an appropriate amount of deionized water to stir on a magnetic stirring table to mix them evenly until clear. 5.85g of ethylenediaminetetraacetic acid and 20mL of ammonia water were mixed into a clear solution and poured into the beaker described above to prepare a precursor solution. The solution was heated with continuous stirring at 90°C-100°C until the solution turned into a gel. The gelatinous mixture was sent to a 200°C electric blast drying oven for drying for 8 hours to obtain a black fluffy solid precursor. A part of the precursor was taken and placed in a tube furnace, fed with an oxygen atmosphere, raised to 800°C at a heating rate of 5°C / min and kept for 5h. After natural cooling, take out ...

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Abstract

The invention discloses a perovskite-type carbon dioxide electroreduction catalyst and a preparation method thereof. In the present invention, a small amount of silver element is doped into the lanthanum-strontium-manganese-based perovskite oxide, so that the material with almost no carbon dioxide catalytic reduction activity becomes an efficient catalyst material with high carbon monoxide Faradaic efficiency and long-term operation stability The performance is significantly better than that of traditional silver foil catalysts. The catalyst in the present invention has a simple synthesis method, is easy to be produced and used on a large scale, and has certain value for reducing the concentration of carbon dioxide in the atmosphere today.

Description

technical field [0001] The invention belongs to the technical field of electrochemical carbon dioxide reduction catalysts, and relates to a perovskite-type carbon dioxide electroreduction catalyst and a preparation method thereof. Background technique [0002] In recent years, the issue of global warming caused by the greenhouse effect has attracted worldwide attention. The carbon dioxide emitted by the massive consumption of traditional fossil fuels is one of the main culprits of the greenhouse effect. To this end, scientists from all over the world have studied new technologies for capturing and converting carbon dioxide in the atmosphere. [1] . Among them, the scheme of using electricity provided by renewable energy to electroreduce carbon dioxide molecules into useful chemicals such as carbon monoxide, methane, ethylene or ethanol is a technical scheme that has attracted much attention at present. [2] . This solution is expected not only to reduce the concentration o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68C25B1/23C25B11/091
CPCB01J23/688B01J35/0033C25B11/04C25B1/00
Inventor 周嵬吴心浩孙增森谢峰华戴洁郭亚楠邵宗平
Owner NANJING TECH UNIV
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