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Cu-Yb alloy nanocatalyst for electrocatalytically reducing CO2 into energy

An alloy catalyst, CO2 technology, applied in the direction of carbon compound catalysts, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as high potential, low product selectivity, and poor catalytic stability , to achieve the effect of simple operation, less raw material consumption, good physical and chemical properties and stability

Active Publication Date: 2019-08-23
内蒙古元瓷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Combining the above status quo, the present invention aims at the shortcomings of Cu-based catalysts such as high reaction overpotential, low product selectivity, and poor catalytic stability, and aims to improve the electrocatalytic reduction of CO by optimizing the structure and composition of Cu-based catalysts. 2 Performance

Method used

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  • Cu-Yb alloy nanocatalyst for electrocatalytically reducing CO2 into energy

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specific Embodiment approach 1

[0027] Specific embodiment one: a kind of preparation method of Cu-Yb nano-alloy electrocatalyst is characterized in that it is finished according to the following steps:

[0028] 1. Add 20 mL of triethylene glycol as a solvent into a three-necked flask, connect the air guide tube and the spherical condenser tube, and pass N through the air guide tube. 2 / Ar mixed gas, continuous ventilation for 20 minutes to remove dissolved oxygen, to ensure that the subsequent reaction is carried out under an inert atmosphere;

[0029] 2. Heat to 280°C at a rate of 5°C / min, and magnetically stir at an appropriate rate.

[0030] 3. Dissolve the metal salt and PVP (K30) in 1 mL of triethylene glycol as a solvent to obtain 0.4 mol / L Cu(Ac) 2 and 0.1 mol / L Y(NO 3 ) 3 and 0.5 mol / L of PVP (K30);

[0031] 4. Inject the above-mentioned dissolved metal salt into the above-mentioned hot solution, and keep the reaction for 15 minutes.

[0032] 5. Remove the flask from the heating source, rapidly...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent added in step 1 is 20 mL of diethylene glycol; other aspects are the same as Embodiment 1.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the volume of adding the triethylene glycol solvent described in Step 1 is 10 mL; the others are the same as Embodiment 1.

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Abstract

The invention provides a preparation method of a Cu-Yb alloy nanocatalyst for electrocatalytically reducing CO2 into energy source. The Cu-Yb alloy nanocatalyst can reduce CO2 into valuable gas phaseproducts (such as CO, CH4, C2H4) and liquid phase products. The electrocatalytic reduction performance of a Cu-based alloy catalyst to CO2 is improved, and the reduction selectivity to CH4 is improved. Different kinds and different use amounts of rare earth metals are screened, and form a copper rare earth alloy material, and the rare earth Yb is finally determined, and is alloyed with Cu; a Cu-nano catalyst and a Cu-Yb nanometal electrocatalyst with uniform alloy distribution are prepared by a simple chemical liquid phase reduction process according to the characteristics of quenching rapid nucleation synthesis; and the influences of the morphology and the composition of the Cu-Yb alloy electrocatalyst on the performance of electrocatalytic reduction of CO2 are studied, and a certain reference is provided for the rational design of the electrocatalyst. The method has the advantages of simplicity in process operation, safeness, reliability, low cost and good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a Cu-Yb nano-alloy material, and the obtained Cu-Yb nano-alloy material is applied in the field of catalysis, especially related to electrocatalytic reduction of CO 2 field. Background technique [0002] CO 2 As a greenhouse gas, its impact on the climate is slowly but significantly affecting our production and life. And our urgent goal is to reduce greenhouse gas emissions, reduce the harm of human activities to the climate system, and slow down climate change. Therefore, some researchers have proposed to use multiple methods at the same time to reduce global CO 2 Negative effects of high emissions, such as atmospheric CO 2 capture and storage, improve the energy efficiency of vehicles and buildings, and use alternative energy sources. Among them, the CO 2 The conversion of high value-added chemicals or fuels through catalytic reactions can not only achieve the reduction of atmospheric CO 2 The co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C1/12C07C9/04
CPCB01J23/83C07C1/12C07C2523/83C07C9/04
Inventor 王志江
Owner 内蒙古元瓷新材料科技有限公司