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Nano copper electrode material as well as preparation method and application thereof

An electrode material, nano-copper technology, applied in the field of nano-materials, can solve the problems of poor selectivity, low activity, high hydrogen evolution activity, etc., and achieve the effects of increased selectivity, enhanced mass transfer rate, and high working stability

Active Publication Date: 2018-09-21
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to prepare a copper nanowire aggregate electrode material with a super-aerophilic surface, so that it has an interface super-aerophilic property for carbon dioxide gas, and solves the problem of low activity of the copper nanowire aggregate electrode material in the electrochemical reduction of carbon dioxide. Poor selectivity and high hydrogen evolution activity in side reactions

Method used

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  • Nano copper electrode material as well as preparation method and application thereof
  • Nano copper electrode material as well as preparation method and application thereof
  • Nano copper electrode material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The superaerophilic copper nanowire aggregate electrode material was prepared by the following steps:

[0042] A. prepare reaction solution, prepare the copper sulfate solution of 0.1mol / L, the sodium hydroxide solution of 14.5mol / L and the hydrazine solution that mass concentration is 35%; And the polytetrafluoroethylene water dispersion liquid that mass concentration is 10% and 0.1mol / L potassium bicarbonate solution;

[0043] B. Add 6 mL of copper sulfate solution with a concentration of 0.1 mol / L to 120 mL of sodium hydroxide solution with a concentration of 14.5 mol / L, then add 760 μL of ethylenediamine, preheat to 70°C, and then add 60 μL with a mass concentration of 35 % hydrazine solution, reacted at 70°C for 2 hours to obtain a copper nanowire dispersion;

[0044]C. Uniformly disperse the copper nanowire dispersion liquid obtained in step B in absolute ethanol; add 15 μ L of polytetrafluoroethylene dispersion liquid with a mass concentration of 10% to 1 mL of ...

Embodiment 2

[0057] Prepare super aerophilic copper nanowire array electrode material by the following steps:

[0058] a. preparation reaction solution, concentration is the mixed solution of the sodium hydroxide of 2.66mol / L and the ammonium persulfate that concentration is 0.13mol / L; Mass concentration is the polytetrafluoroethylene dispersion liquid of 5%; The carbonic acid of 0.1mol / L potassium hydrogen solution;

[0059] b. Pretreat the copper foil of the conductive base, ultrasonically clean it in acetone, dilute hydrochloric acid and deionized water for 10 minutes in sequence, and then immerse the pretreated copper foil in step a with a concentration of 2.66mol / L of sodium hydroxide and a concentration of In a mixed solution of 0.13mol / L ammonium persulfate, take it out after reacting for 10 minutes, wash and dry, and obtain a copper foil with a copper hydroxide nanowire array;

[0060] c. Put the copper foil with the copper hydroxide nanowire array obtained in step b into the poly...

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Abstract

The invention discloses a nano copper electrode material which comprises a conductive substrate and super-aerophilic copper nanowire aggregate attached to the surface of the conductive substrate, wherein multiple grain boundaries exist on the copper nanowire surface. The invention further discloses a preparation method of the nano copper electrode material and application thereof in electrochemical reduction of carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a nanometer copper electrode material, its preparation method and application. Background technique [0002] At present, people's large-scale exploitation and use of fossil fuels such as coal, oil, and natural gas have caused excessive emissions of carbon dioxide in the atmosphere, which has brought about a series of global problems such as ocean acidification, climate warming, and sea level rise. On the other hand, excessive reliance on fossil fuels has gradually highlighted the energy crisis. As a new type of energy conversion technology, electrocatalytic carbon dioxide reduction technology can convert carbon dioxide into carbon monoxide, formic acid, ethylene, ethanol and other fuels by using electric energy converted from renewable energy, artificially creating a closed carbon ring and realizing carbon dioxide Recycling has attracted widespread attent...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B3/04B22F9/24B22F1/00B82Y30/00B82Y40/00C25B3/25
CPCC25B11/04B82Y30/00B82Y40/00B22F9/24C25B3/25B22F1/07B22F1/0547
Inventor 孙晓明章雨生蔡钊邝允
Owner BEIJING UNIV OF CHEM TECH
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