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Preparation method and applications of impregnation type mono-atomic iron-carbon layer modified nickel based or cobalt based composite material electrode

A composite material and impregnated technology, which is applied in the field of electrochemistry, can solve problems that have not yet been discovered, and achieve the effects of easy industrial implementation, cheap and easy-to-obtain raw materials, and low electrocatalytic decomposition of water for oxygen evolution reaction overpotential

Active Publication Date: 2019-06-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no modification of nickel-based or cobalt-based composite electrodes with impregnated single-atom iron-carbon layers has been found.

Method used

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  • Preparation method and applications of impregnation type mono-atomic iron-carbon layer modified nickel based or cobalt based composite material electrode
  • Preparation method and applications of impregnation type mono-atomic iron-carbon layer modified nickel based or cobalt based composite material electrode
  • Preparation method and applications of impregnation type mono-atomic iron-carbon layer modified nickel based or cobalt based composite material electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of the iron-carbon (Fe-C) electrode adopts the impregnation-calcination method: Weigh 0.1 g of tannic acid in a 50 mL beaker, add 5 mL of ethanol solution to it, stir magnetically until it is completely dissolved, and form solution A; Weigh 0.1 g of ferric nitrate nonahydrate and dissolve it in 5 mL of ethanol solution to form solution B; slowly add the obtained clear solution B to solution A dropwise, and stir magnetically at room temperature for 2 h to form colloidal solution C. Take a size of about 1×2 cm 2 The carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) was immersed in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Then transfer the impregnated carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) into a semi-closed porcelain boat, and then transfer it to a temperature-programmed tube furnace. The tube furnace was heated to 3...

Embodiment 2

[0033] The preparation of the iron-carbon (Fe-C) electrode adopts the impregnation-calcination method: Weigh 0.1 g of tannic acid in a 50 mL beaker, add 5 mL of ethanol solution to it, stir magnetically until it is completely dissolved, and form solution A; Weigh 0.1 g of ferric nitrate nonahydrate and dissolve it in 5 mL of ethanol solution to form solution B; slowly add the obtained clear solution B to solution A dropwise, and stir magnetically at room temperature for 2 h to form colloidal solution C. Take a size of about 1×2 cm 2 The carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) was immersed in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Then transfer the impregnated carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) into a semi-closed porcelain boat, and then transfer it to a temperature-programmed tube furnace. The tube furnace was heated to 4...

Embodiment 3

[0035]The preparation of the iron-carbon (Fe-C) electrode adopts the impregnation-calcination method: Weigh 0.1 g of tannic acid in a 50 mL beaker, add 5 mL of ethanol solution to it, stir magnetically until it is completely dissolved, and form solution A; Weigh 0.1 g of ferric nitrate nonahydrate and dissolve it in 5 mL of ethanol solution to form solution B; slowly add the obtained clear solution B to solution A dropwise, and stir magnetically at room temperature for 2 h to form colloidal solution C. Take a size of about 1×2 cm 2 The carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) was immersed in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Then transfer the impregnated carbon cloth (CC or carbon paper CP or conductive glass FTO or stainless steel mesh SSM) into a semi-closed porcelain boat, and then transfer it to a temperature-programmed tube furnace. The tube furnace was heated to 50...

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Abstract

The invention belongs to the technical field of electrochemistry, and relates to a preparation method of an impregnation type mono-atomic iron-carbon layer modified nickel based or cobalt based composite material electrode. The preparation method comprises following steps: preparing an ethanol solution of tannic acid and an ethanol solution of ferric nitrate; slowly and dropwise adding the ferricnitrate solution into the tannic acid solution to form a colloidal solution; soaking a substrate material into the colloidal solution, wherein the substrate material is nickel based or cobalt based carbon paper, carbon cloth, electroconductive glass or a stainless steel net; taking out the substrate material, mixing the substrate material with a sulfur source, a phosphor source, or a nitrogen source, (or no other raw material is added), burning the substrate material for 0.5 to 4 hours under the protection of inert gas, and cooling. The raw materials are cheap, nontoxic and easily available, the operation is easy and simple, multiple substrates can be painted and impregnated, the reaction time is short, and industrialization is easy. The prepared composite material electrode has a good morphology maintaining performance, good electrochemical properties, and high stability, and can be applied to electrocatalytic decomposition of water to prepare oxygen. The prepared composite material can be used as the positive pole for electrocatalytic decomposition of water; and the over-potential is 280 mV, when the current density is 40 mA / cm<-2>.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a method for preparing an impregnated single-atom iron-carbon layer modified material, in particular to a method for preparing an impregnated single-atom iron-carbon layer modified nickel-based or cobalt-based composite electrode and its application . Background technique [0002] Oxygen evolution reaction (OER) is an important link in water splitting and solar fuel cells, however, the complex multi-electron transport hinders its kinetic process. Effective electrocatalysts are the key to accelerating the reaction rate and reducing the reaction overpotential, thereby improving the energy conversion efficiency. Therefore, finding and optimizing high-efficiency electrocatalysts has attracted extensive attention. [0003] So far, it has been reported to prepare alloys and compounds based on elements such as Fe, Co, and Ni, which are abundant in the earth's crust, and exhibit catalytic...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/06C25B1/04
CPCY02E60/36
Inventor 施伟东张正媛
Owner JIANGSU UNIV
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