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Catalyst for electrochemical reduction of carbon dioxide and preparation and application of catalyst

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: 2016-06-15
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

Method used

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  • Catalyst for electrochemical reduction of carbon dioxide and preparation and application of catalyst
  • Catalyst for electrochemical reduction of carbon dioxide and preparation and application of catalyst
  • Catalyst for electrochemical reduction of carbon dioxide and preparation and application of catalyst

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Embodiment 1

[0031] A carbon dioxide electrochemical reduction catalyst, composed of multi-level structure coral-like nano-stannous oxide, the preparation method of the multi-level structure coral-like nano-stannous oxide is a hydrothermal method, the specific steps are: take 12mmol of urea and 2mmol Tin dichloride is mixed and dissolved in 50mL deionized water to form a uniform milky white solution, which is the catalyst precursor. The catalyst precursor is placed in a reactor, and the reactor has a polytetrafluoroethylene liner, a stainless steel Put the 80mL hydrothermal reaction kettle in the jacket, put the reaction kettle in an oven at 85°C for hydrothermal reaction for 12 hours, wash the obtained solid with deionized water and absolute ethanol several times to neutrality, and centrifuge the obtained solid in After drying in an oven at 60°C for 8 hours, a multi-level coral-like nano-stannous oxide (SnO85-12 ), as a catalyst for the electrochemical reduction of carbon dioxide.

Embodiment 2

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

Embodiment 3

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

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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, and in particular relates to the preparation and application of a carbon dioxide electrochemical reduction catalyst supported by a nano-stannous oxide catalyst on a gas diffusion electrode. Background technique [0002] With the rapid development of industry and the massive consumption of fossil fuels, CO in the atmosphere 2 content has continued to increase over the past few decades. From 280ppm before the industrial revolution to the current 400ppm [EnergyEnviron.Sci., 1, 86-100 (2008)]. From an economic point of view, carbon dioxide has become an important C1 raw material in organic synthesis because of its high functionality, abundant, renewable carbon source, and environmental friendliness [Dalton Trans., 39, 3347-3357 (2010)]. Therefore, how to resource carbon dioxide and convert it into liquid fuel or other useful chemic...

Claims

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Application Information

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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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