Preparation method for loosened porous cuprous oxide material and application of cuprous oxide in electrocatalytic reduction of carbon dioxide

A cuprous oxide, loose and porous technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of lack of research and achieve the effect of lowering the activation barrier, high carbon dioxide electrocatalytic reduction activity, and promoting reactivity

Inactive Publication Date: 2019-03-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new process described in this patents allows for creation of tiny particles called pumice or foam made from fine powders that have multiple layers of atoms arranged into regular patterns on their surfaces. These small particles help catalysts work better when they come across them during chemical reactions like reducing CO2 molecules.

Problems solved by technology

Technological Problem addressed in this patented technical problem relates to finding ways to efficiently reduce greenhouse gases emissions from industrial activities related to combustion engines like power plants and internal combustors. Specifically, current methods require expensive noble metals which cannot meet these requirements effectively without causing pollution issues associated with their usage.

Method used

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  • Preparation method for loosened porous cuprous oxide material and application of cuprous oxide in electrocatalytic reduction of carbon dioxide
  • Preparation method for loosened porous cuprous oxide material and application of cuprous oxide in electrocatalytic reduction of carbon dioxide
  • Preparation method for loosened porous cuprous oxide material and application of cuprous oxide in electrocatalytic reduction of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Wash the analytically pure cuprous iodide powder with 0.1mol / L HCl aqueous solution, remove the acid solution after oscillating and ultrasonically for 10 minutes, and then use N 2 The cuprous iodide powder was washed three times with ethanol after deoxygenation, and was washed with N 2 blow dry.

[0034] (2) Equip 15mL of 3M KI solution, add excess (>700mg) cuprous iodide powder obtained in step (1), place it in an oven at 60°C for 3 hours, and fully complex to obtain [CuI 2 ] - Complexing fluid.

[0035] (3) 2mL 2.5M NaOH solution is equipped in a 10mL beaker, and it is added to 10mL step (2) gained [CuI 2 ] - In the complexing solution, a large amount of orange-yellow precipitate was obtained.

[0036] (4) Divide the orange-yellow precipitate in the beaker into multiple large centrifuge tubes, centrifuge at 6000 rpm for 3 minutes, add ultrapure water to wash repeatedly, and centrifuge three times, then add acetone to wash and centrifuge twice , and then add ...

Embodiment 2

[0038] (1) Wash the analytically pure cuprous iodide powder with 0.1mol / L HCl aqueous solution, remove the acid solution after oscillating and ultrasonically for 10 minutes, and then use N 2 The cuprous iodide powder was washed three times with ethanol after deoxygenation, and was washed with N 2 blow dry.

[0039] (2) Equip 15mL of 5M KI solution, add excess (>1500mg) cuprous iodide powder obtained in step (1), put it in an oven at 60°C for 2 hours, and fully complex to obtain [CuI 2 ] - Complexing fluid.

[0040] (3) 3mL 3.0M NaOH solution is equipped in a 10mL beaker, and it is added to 10mL step (2) gained [CuI 2 ] - In the complexing solution, a large amount of orange-yellow precipitate was obtained.

[0041] (4) Divide the orange-yellow precipitate in the beaker into multiple large centrifuge tubes, centrifuge at 6000 rpm for 3 minutes, add ultrapure water to wash repeatedly, and centrifuge three times, then add acetone to wash and centrifuge twice , and then add a...

Embodiment 3

[0043] (1) Wash the analytically pure cuprous iodide powder with 0.1mol / L HCl aqueous solution, remove the acid solution after oscillating and ultrasonically for 10 minutes, and then use N 2 The cuprous iodide powder was washed three times with ethanol after deoxygenation, and was washed with N 2 blow dry.

[0044] (2) Equip 15mL of 8M KI solution, add excess (>2000mg) cuprous iodide powder obtained in step (1), place it in an oven at 60°C for 2 hours, and fully complex to obtain [CuI 2 ] - Complexing fluid.

[0045] (3) Equip 0.1M NaOH solution with a 500mL volumetric flask, and take out 250mL and place it in a 400mL beaker, then add 10mL of the obtained [CuI in step (2) 2 ] - complex solution, a large number of orange-yellow precipitates were obtained.

[0046] (4) Divide the orange-yellow precipitate in the beaker into multiple large centrifuge tubes, centrifuge at 6000 rpm for 3 minutes, add ultrapure water to wash repeatedly, and centrifuge three times, then add acet...

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Abstract

The invention discloses a preparation method for a loosened porous cuprous oxide material and an application of cuprous oxide in electrocatalytic reduction of carbon dioxide. The preparation method disclosed by the invention comprises the following steps: mainly taking dilute acid and copper iodide powder after cleaning with ethyl alcohol as raw materials; preparing in a potassium iodide or sodiumiodide solution, thereby acquiring a complexing solution; adding a certain amount of complexing solution into a strong base solution at a ratio, thereby acquiring a sediment product; lastly, using ultrapure water and acetone for repeatedly centrifugal cleaning, and drying by blowing nitrogen, thereby acquiring the loosened porous cuprous oxide material. According to the invention, a simple, quick, safe and controllable basic hydrolysis method is adopted for synthesizing the loosened porous cuprous oxide material with clean surface, increasing specific surface area of the material and promoting catalytic activity; residual oxygen is utilized to reduce activation barrier of coupling reaction of intermediate products, so that reaction activity for high-carbon products is greatly boosted; total Faraday efficiency of the material for electro-catalytically reducing carbon dioxide into high-carbon products, such as ethylene, ethyl alcohol and normal propyl alcohol, is increased to above 80%.

Description

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Claims

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Application Information

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Owner TIANJIN UNIV
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