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Nickel-doped Co<9>S<8> nano-sheet dual-function electro-catalyst and method for preparing same

A technology of electrocatalysts and nanosheets, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., to achieve the effects of reducing overvoltage, improving electrocatalytic performance, and simple process preparation

Active Publication Date: 2019-01-04
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Nevertheless, there is currently no cobalt-based electrocatalyst that can be used in wastewater to simultaneously realize urea oxidation and hydrogen production. Therefore, the present invention proposes a cobalt-based bifunctional electrocatalyst that can simultaneously realize hydrogen evolution and urea sewage treatment and its Preparation method, in order to solve the above problems

Method used

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  • Nickel-doped Co&lt;9&gt;S&lt;8&gt; nano-sheet dual-function electro-catalyst and method for preparing same
  • Nickel-doped Co&lt;9&gt;S&lt;8&gt; nano-sheet dual-function electro-catalyst and method for preparing same
  • Nickel-doped Co&lt;9&gt;S&lt;8&gt; nano-sheet dual-function electro-catalyst and method for preparing same

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Effect test

Embodiment 1

[0054] A nickel-doped Co 9 S 8 A method for preparing a nanosheet bifunctional electrocatalyst, comprising the steps of:

[0055] (1) Soak the carbon cloth in concentrated nitric acid for 30 minutes, then ultrasonically wash it with deionized water and ethanol for 20 minutes; then dry it in a drying oven for 10 hours, and set aside;

[0056] (2) Dissolve 3mM cobalt chloride hexahydrate and 3mM nickel chloride hexahydrate in 100 ml of deionized water, stir the solution containing gu ions and nickel ions for 2h, then immerse the carbon cloth in step (1) in the above solution , using carbon cloth as the working electrode, platinum mesh as the counter electrode, and calomel electrode as the reference electrode, deposited at a constant voltage of -1.0V for 5 min; rinsed the deposited carbon cloth with deionized water, and dried it at 50°C 12h, obtain the Ni-Co nano sheet precursor that is deposited on the carbon cloth, standby;

[0057] (3) Dissolve 8 mmol of thioacetamide in 40...

Embodiment 2

[0059] A nickel-doped Co 9 S 8 A method for preparing a nanosheet bifunctional electrocatalyst, comprising the steps of:

[0060] (1) Soak the carbon cloth in concentrated nitric acid for 30 minutes, then ultrasonically wash it with deionized water and ethanol for 20 minutes; then dry it in a drying oven for 10 hours, and set aside;

[0061] (2) Dissolve 6mM cobalt chloride hexahydrate and 3mM nickel chloride hexahydrate in 100 ml of deionized water, stir the solution containing gu ions and nickel ions for 2h, then immerse the carbon cloth in step (1) in the above solution , the carbon cloth was used as the working electrode, the platinum mesh was used as the counter electrode, and the calomel electrode was used as the reference electrode. It was deposited at a constant voltage of -1.0V for 5 min; the deposited carbon cloth was rinsed with deionized water and dried at 50°C for 12 h , to obtain Ni-Co nanosheet precursors deposited on carbon cloth,

[0062] spare;

[0063] (...

Embodiment 3

[0065] A nickel-doped Co 9 S 8 A method for preparing a nanosheet bifunctional electrocatalyst, comprising the steps of:

[0066] (1) Soak the carbon cloth in concentrated nitric acid for 30 minutes, then ultrasonically wash it with deionized water and ethanol for 20 minutes; then dry it in a drying oven for 10 hours, and set aside;

[0067] (2) Dissolve 9mM cobalt chloride hexahydrate and 3mM nickel chloride hexahydrate in 100 ml of deionized water, stir the solution containing gu ions and nickel ions for 2h, then immerse the carbon cloth in step (1) in the above solution , the carbon cloth was used as the working electrode, the platinum mesh was used as the counter electrode, and the calomel electrode was used as the reference electrode. It was deposited at a constant voltage of -1.0V for 5 min; the deposited carbon cloth was rinsed with deionized water and dried at 50°C for 12 h , to obtain the Ni-Co nanosheet precursor deposited on the carbon cloth, for subsequent use; ...

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Abstract

The invention relates to a nickel-doped Co<9>S<8> nano-sheet dual-function electro-catalyst and a method for preparing the same, and belongs to the technical field of full-hydrolysis hydrogen production. The method includes steps of (1), depositing Ni-Co nano-sheet precursors on conductive flexible substrates by the aid of electro-deposition processes; (2), preparing nickel-doped Co<9>S<8> nano-sheets from the precursors, which are obtained at the step (1), by the aid of hydrothermal processes so as to obtain the nickel-doped Co<9>S<8> nano-sheet dual-function electro-catalyst. The nickel-doped Co<9>S<8> nano-sheet dual-function electro-catalyst and the method have the advantages that the Co<9>S<8> nano-sheets which perpendicularly grow can be formed on the surfaces of the conductive flexible substrates by the aid of simple electro-deposition and hydrothermal reaction processes, the conductive flexible substrates are used as templates, accordingly, the effective contact areas of the nano-sheets and electrolyte solution can be greatly enlarged, large quantities of electro-catalytic active sites can be exposed, ion diffusion paths can be shortened, and the electro-catalytic activitycan be greatly improved; nickel is doped, accordingly, electron structures of Co<9>S<8> further can be effectively regulated and controlled, and the electron transfer efficiency and the conductivity of the Co<9>S<8> can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by total splitting of water, and in particular relates to a dual-functional electrocatalyst capable of simultaneously realizing hydrogen evolution and urea sewage treatment and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution are currently the main problems facing human society. Hydrogen, as a clean and renewable energy, has been paid close attention to and pursued by people because of its zero emission and high energy density. Among the many production methods for hydrogen production, hydrogen production by electrolysis of water is considered to be one of the most potential hydrogen production technologies due to its ease of operation and environmental friendliness. However, as the anodic half-reaction of total water splitting, the oxygen evolution reaction requires the transfer of four electrons (4OH - →O 2 +2H 2 O+4e - ), lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C02F1/72C25B11/06C25B1/04C02F101/38
CPCC25B1/04C02F1/725B01J27/043C02F2101/38C25B11/091B01J35/33Y02E60/36
Inventor 郝品朱文倩谢俊峰雷风采辛莹唐波
Owner SHANDONG NORMAL UNIV
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