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Preparation method of coating type nickel-doped ferrous sulfide/carbon composite electrode

A carbon composite material and iron sulfide technology, which is applied in the field of electrochemistry and can solve the problems such as nickel-doped iron sulfide/carbon composite material electrodes that have not yet been found

Active Publication Date: 2017-12-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no coating-sulfurization method has been found to prepare nickel-doped iron sulfide / carbon composite electrodes

Method used

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  • Preparation method of coating type nickel-doped ferrous sulfide/carbon composite electrode
  • Preparation method of coating type nickel-doped ferrous sulfide/carbon composite electrode
  • Preparation method of coating type nickel-doped ferrous sulfide/carbon composite electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of FeS-C / CC electrode adopts the method of coating-vulcanization: Weigh 1 g of tannic acid in a 50 mL beaker, add 10 mL of deionized water to it, and magnetically stir until it is completely dissolved to form solution A; Weigh 0.2 g of ferric nitrate nonahydrate and dissolve it in 15 mL of deionized water to form solution B; slowly add the obtained clear solution B to solution A, 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) was soaked in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Weigh 0.1 g of sulfur powder and transfer it into a semi-closed porcelain boat, then transfer the impregnated carbon cloth (CC) into the porcelain boat, and then transfer it to a temperature-programmed tube furnace. Under the protection of Ar gas, the The temperature-programmed tube furnace was heated to 400 °C at a heating rate of 10 °C / min a...

Embodiment 2

[0039] The preparation of FeS-C / CC electrode adopts the method of coating-vulcanization: Weigh 1 g of tannic acid in a 50 mL beaker, add 10 mL of deionized water to it, and magnetically stir until it is completely dissolved to form solution A; Weigh 0.2 g of ferric nitrate nonahydrate and dissolve it in 15 mL of deionized water to form solution B; slowly add the obtained clear solution B to solution A, 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) was soaked in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Weigh 0.1 g of sulfur powder and transfer it into a semi-closed porcelain boat, then transfer the impregnated carbon cloth (CC) into the porcelain boat, and then transfer it to a temperature-programmed tube furnace. Under the protection of Ar gas, the The temperature-programmed tube furnace was heated to 400 °C at a heating rate of 10 °C / min a...

Embodiment 3

[0042] The preparation of FeS-C / CC electrode adopts the method of coating-vulcanization: Weigh 2 g of tannic acid into a 50 mL beaker, add 10 mL of deionized water to it, and magnetically stir until it is completely dissolved to form solution A; Weigh 0.2 g of ferric nitrate nonahydrate and dissolve it in 15 mL of deionized water to form solution B; slowly add the obtained clear solution B to solution A, 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) was soaked in colloidal solution C for about 1 h, taken out, put into an oven, and dried at 60 °C for 6 h. Weigh 0.1 g of sulfur powder and transfer it into a semi-closed porcelain boat, then transfer the impregnated carbon cloth (CC) into the porcelain boat, and then transfer it to a temperature-programmed tube furnace. Under the protection of Ar gas, the The temperature-programmed tube furnace was heated to 400 °C at a heating rate of 10 °C / min...

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Abstract

The invention belongs to the technical field of electrochemistry and relates to a preparation method of a coating type ferrous sulfide / carbon composite, in particular to a preparation method of a coating type nickel-doped ferrous sulfide / carbon composite electrode. The preparation method comprises the steps that firstly, a tannic acid aqueous solution and a ferric nitrate aqueous solution are respectively prepared, and the ferric nitrate aqueous solution is dropwise added to the tannic acid aqueous solution under the condition of stirring at the normal temperature, so that a colloidal solution is formed; secondly, hydrazine hydrate is added to a nickel chloride hexahydrate aqueous solution, and the obtained mixed solution is dropwise added to the colloidal solution and evenly mixed with the colloidal solution; a substrate material is soaked in the mixed system to obtain a precursor, after being taken out, the precursor together with sulfur powder is calcinated in the inert gas shielding atmosphere for 0.5-2 h, and the coating type nickel-doped ferrous sulfide / carbon composite electrode is obtained after cooling. By the adoption of the preparation method of the coating type nickel-doped ferrous sulfide / carbon composite electrode, operation is simple and easy to conduct, multiple kinds of substrates can be coated, the reaction time is short, and industrialization is easy; the prepared composite electrode has good electrochemical performance and stability, raw materials are at a low price, easy to obtain and free of toxicity, the prepared composite electrode can be directly used as the electrode for an electro-catalytic water decomposition oxygen evolution reaction; and when the current density is 10 mA.cm<-2>, the overpotential reaches 320 mV, and the Tafel slope is 43 mV.dec<-1>.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a preparation method of a coated iron sulfide / carbon composite material, in particular to a preparation method of a coated nickel-doped iron sulfide / carbon composite electrode. Background technique [0002] Oxygen evolution reaction (OER) is an important component of 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. So far, it has been reported that Ir / Ru-based materials are the best electrocatalysts for water splitting and oxygen evolution, but they cannot be prepared and applied on a large scale due to their low reserves in the earth's crust and...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B01J27/043
CPCB01J27/043C25B1/04C25B11/051C25B11/091Y02E60/36
Inventor 张正媛施伟东
Owner JIANGSU UNIV
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