A kind of carbon dioxide electrochemical reduction catalyst and its preparation and application

A carbon dioxide and catalyst technology, which is applied in the field of carbon dioxide electrochemical reduction catalyst and its preparation and application, can solve the problem of low reduction current density, achieve the effects of solving the problem of low reduction current density, improving energy efficiency, and convenient operation

Inactive Publication Date: 2018-08-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst is prepared by a simple hydrothermal method. By effectively controlling the catalyst preparation conditions (time, temperature), a stannous oxide nanocatalyst with a special morphology (coral root) structure and a high specific surface area can be obtained, which can greatly increase the carbon dioxide The specific surface area in contact with the catalyst provides more catalytic active sites, and at the same time effectively inhibits the accompanying hydrogen evolution reaction during the reduction of carbon dioxide; the selected gas diffusion electrode can not only solve the problem of low reduction current density, but also improve the CO 2 Utilization and conversion ratios, thereby increasing Faradaic efficiency

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  • A kind of carbon dioxide electrochemical reduction catalyst and its preparation and application
  • A kind of carbon dioxide electrochemical reduction catalyst and its preparation and application
  • A kind of carbon dioxide electrochemical reduction catalyst and its preparation and application

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Embodiment 1

[0031]A carbon dioxide electrochemical reduction catalyst, which is composed of multi-level structure coral-shaped nano-tin oxide, the preparation method of the multi-level structure coral-shaped nano-tin oxide is a hydrothermal method, and the specific steps are: taking 12 mmol of urea and 2 mmol of The tin dichloride is mixed and dissolved in 50 mL of deionized water to form a uniform milky white solution, which is the catalyst precursor. The 80mL hydrothermal reaction kettle of the jacket was placed in an oven at 85°C for hydrothermal reaction for 12 hours, the obtained solid was washed with deionized water and absolute ethanol for several times to neutrality, centrifuged, and the obtained solid was placed in a After drying in an oven at 60 °C for 8 hours, a multi-level structure coral-like nano-tin stannous oxide (SnO) was obtained. 85-12 ) as a catalyst for the electrochemical reduction of carbon dioxide.

Embodiment 2

[0033] A carbon dioxide electrochemical reduction catalyst, which is composed of multi-level structure coral-shaped nano-tin oxide, the preparation method of the multi-level structure coral root-shaped nano-tin oxide is a hydrothermal method, and the specific steps are: taking 12 mmol of urea and 2mmol of tin dichloride is mixed and dissolved in 50mL of deionized water to form a uniform milky white solution, which is a catalyst precursor, and the catalyst precursor is placed in a reaction kettle, and the reaction kettle has a polytetrafluoroethylene liner, An 80mL hydrothermal reaction kettle with a stainless steel jacket was placed in an oven at 100°C for hydrothermal reaction for 12 hours, the obtained solid was washed with deionized water and absolute ethanol for several times to neutrality, centrifuged, and the obtained solid was separated by centrifugation. After drying in an oven at 60 °C for 8 hours, a multi-level structure coral-like nano-tin stannous oxide (SnO) was ob...

Embodiment 3

[0035] A carbon dioxide electrochemical reduction catalyst, which is composed of multi-level structure coral-shaped nano-tin oxide, the preparation method of the multi-level structure coral root-shaped nano-tin oxide is a hydrothermal method, and the specific steps are: taking 12 mmol of urea and 2mmol of tin dichloride is mixed and dissolved in 50mL of deionized water to form a uniform milky white solution, which is a catalyst precursor, and the catalyst precursor is placed in a reaction kettle, and the reaction kettle has a polytetrafluoroethylene liner, An 80mL hydrothermal reaction kettle with a stainless steel jacket was placed in an oven at 120°C for hydrothermal reaction for 12 hours, the obtained solid was washed several times to neutrality with deionized water and absolute ethanol, centrifuged, and the obtained solid was separated by centrifugation. After drying in an oven at 60 °C for 8 hours, a multi-level structure coral-like nano-tin stannous oxide (SnO) was obtain...

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Abstract

The invention provides a catalyst for electrochemical reduction of carbon dioxide. The catalyst is characterized by comprising coralline-shaped nanometer stannous oxide. The preparation method of the coralline-shaped nanometer stannous oxide comprises the following steps of dissolving urea and stannous chloride in deionized water to obtain a catalyst precursor; placing the catalyst precursor in a reaction kettle; carrying out hydrothermal reaction and centrifugal separation; washing and centrifugally separating the obtained solid; and drying the solid to obtain the coralline-shaped nanometer stannous oxide. The stannous oxide catalyst provided by the invention is presented with a particular root-shaped coral stacked morphology, is provided with vivid crystal surfaces (101) and (102), and is compatible with high electrocatalytic activity and selectivity on reduction of the carbon oxide, and the utilization energy efficiency of the carbon oxide can be particularly and remarkably improved. Further, the preparation method of the catalyst, provided by the invention, has the advantages of simplicity in operation, greenness, high yield and wide application prospect.

Description

technical field [0001] The invention belongs to the field of carbon dioxide electrochemical reduction catalyst and its preparation and application, in particular to the preparation and application of a gas diffusion electrode-supported nano-stannous oxide catalyst carbon dioxide electrochemical reduction catalyst. Background technique [0002] With the rapid development of industry and the large consumption of fossil fuels, CO in the atmosphere 2 content has continued to grow over the past few decades. Increased from 280 ppm before the industrial revolution to 400 ppm at present [Energy Environ. Sci., 1, 86-100 (2008)]. From an economic point of view, carbon dioxide has become an important C1 raw material in organic synthesis due to its high functionality, abundance, renewable carbon source, and environmental friendliness [Dalton Trans., 39, 3347-3357 (2010)]. Therefore, how to recycle carbon dioxide and convert it into liquid fuel or other useful chemicals to achieve ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/88H01M4/9016Y02E60/50
Inventor 乔锦丽李亚楠张霞付奕舒
Owner DONGHUA UNIV
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