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Elemental bismuth catalyst for electrochemical reduction of carbon dioxide as well as preparation and application of elemental bismuth catalyst

A carbon dioxide and catalyst technology, which is applied to the preparation and application of carbon dioxide electrochemical reduction catalysts, can solve problems such as rare research reports, and achieve the effects of reducing mass transfer resistance, good application prospects and simple preparation methods.

Active Publication Date: 2017-08-08
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bismuth for CO 2 However, there are very few reports on electrocatalytic reduction of formic acid

Method used

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  • Elemental bismuth catalyst for electrochemical reduction of carbon dioxide as well as preparation and application of elemental bismuth catalyst
  • Elemental bismuth catalyst for electrochemical reduction of carbon dioxide as well as preparation and application of elemental bismuth catalyst
  • Elemental bismuth catalyst for electrochemical reduction of carbon dioxide as well as preparation and application of elemental bismuth catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A carbon dioxide electrochemical reduction catalyst includes a micro-nano-level elemental metal bismuth catalyst synthesized by an aqueous chemical reduction method. The preparation method of the electrochemical reduction catalyst for carbon dioxide is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid (with a concentration of 14.4 M), magnetically stir for 2 hours, make The bismuth nitrate and nitric acid are dissolved in deionized water to obtain a catalyst precursor solution; the solution is transferred to a three-necked flask, and the mixed solution is condensed and refluxed in an oil bath. When the temperature rises to 100℃, add 30mL 8.5M N 2 H 4 ·H 2 O was reduced, and the temperature was kept at 100°C for 30 minutes. After the reaction is over, cool naturally, and the obtained solids were washed with deionized water and absolute ethanol to neutrality and centrifuged...

Embodiment 2

[0037] A carbon dioxide electrochemical reduction catalyst includes a micro-nano elemental metal bismuth catalyst synthesized by a chemical reduction method of aqueous solution. The preparation method of the electrochemical reduction catalyst for carbon dioxide is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid (with a concentration of 14.4 M), magnetically stir for 2 hours, make The bismuth nitrate and nitric acid are dissolved in deionized water to obtain a catalyst precursor solution; the solution is transferred to a three-necked flask, and the mixed solution is condensed and refluxed in an oil bath. When the temperature rises to 100℃, add 30mL 8.5MN 2 H 4 ·H 2 O was reduced, and the temperature was kept at 100°C for 45 minutes. After the reaction is over, cool naturally, and the obtained solids were washed with deionized water and absolute ethanol to neutrality and centrif...

Embodiment 3

[0039] A carbon dioxide electrochemical reduction catalyst includes a micro-nano elemental metal bismuth catalyst synthesized by a chemical reduction method of aqueous solution. The preparation method of the electrochemical reduction catalyst for carbon dioxide is as follows: Weigh 2.5 mmol of bismuth nitrate pentahydrate and add it to a beaker, add 10 mL of deionized water and 0.5 mL of concentrated nitric acid (with a concentration of 14.4 M), magnetically stir for 2 hours, make The bismuth nitrate and nitric acid are dissolved in deionized water to obtain a catalyst precursor solution; the solution is transferred to a three-necked flask, and the mixed solution is condensed and refluxed in an oil bath. When the temperature rises to 100℃, add 30mL 8.5MN 2 H 4 ·H 2 O was reduced, and the temperature was kept at 100°C for 60 minutes. After the reaction is over, cool naturally, and the obtained solids were washed with deionized water and absolute ethanol to neutrality and centrif...

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Abstract

The invention provides preparation and application of a catalyst for electrochemical reduction of carbon dioxide. The catalyst for the electrochemical reduction of the carbon dioxide is characterized by comprising a micro-nano-grade elemental bismuth catalyst; the micro-nano-grade elemental bismuth catalyst is synthesized by a water solution chemical reduction method; a preparation method comprises the following steps: heating a mixed solution of bismuth nitrate and hydrazine hydrate and refluxing; carrying out chemical reduction reaction; after washing a solid product and centrifuging and separating, drying in vacuum to prepare micro-nano-grade elemental bismuth, wherein the micro-nano-grade elemental bismuth has a clear (012) crystal surface. The micro-nano-grade elemental bismuth catalyst provided by the invention has high catalytic activity and selectivity on carbon dioxide reduction and needs low over-potential; the energy efficiency is improved. Furthermore, the preparation method of the catalyst has simple operation, moderate conditions and high yield and easy industrialized production .

Description

Technical field [0001] The invention belongs to the field of preparation and application of a carbon dioxide electrochemical reduction catalyst, and particularly relates to the preparation of an efficient micro-nano-level elemental bismuth catalyst and its application in the electrochemical reduction of carbon dioxide. Background technique [0002] With the rapid development of industry, a large number of primary energy sources such as coal, oil, natural gas and other fuels are consumed. On the one hand, there is a worldwide shortage of resources. On the other hand, CO 2 The excessive emission of greenhouse gases causes environmental pollution that is already unbearable by nature. Reducing carbon emissions and looking for new energy sources to replace fossil fuels have become the focus of global attention. CO 2 As a rich and potential C1 raw material, it can be used to produce chemicals and fuels, reducing or even replacing the current use of fossil fuels [Dalton Trans., 39, 3347...

Claims

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Application Information

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IPC IPC(8): B01J23/18C25B3/04C25B11/06C25B3/25
CPCC25B11/04B01J23/18C25B3/25Y02P20/10
Inventor 乔锦丽张霞刘予宇雷涛张琦董芳魏亚楠
Owner DONGHUA UNIV
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