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Method of preparing nano porous cobalt selenide in low-eutectic ionic liquid via electrodeposition

An ionic liquid and nanoporous technology, applied in chemical instruments and methods, chemical/physical processes, electrodes, etc., can solve the problems that limit the wide application of cobalt selenide, complicated process, poor controllability, etc., and achieve uniform and dense surface, Simple process and good product quality

Inactive Publication Date: 2018-06-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional methods for preparing cobalt selenide mainly include solvothermal method, vapor deposition method, evaporation, electrodeposition method, etc. These methods often have disadvantages such as complex process, poor controllability, high cost, and environmental protection in the preparation process, which are extremely Large limitations limit the wide application of cobalt selenide

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  • Method of preparing nano porous cobalt selenide in low-eutectic ionic liquid via electrodeposition
  • Method of preparing nano porous cobalt selenide in low-eutectic ionic liquid via electrodeposition
  • Method of preparing nano porous cobalt selenide in low-eutectic ionic liquid via electrodeposition

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Embodiment 1

[0022] A method for preparing nanoporous cobalt selenide by electrodeposition in a deep eutectic ionic liquid, the specific steps of which are as follows:

[0023] (1) Electrolyte configuration: Mix choline chloride and urea in a molar ratio of 1:2 to obtain a deep eutectic ionic liquid, then add cobalt chloride hexahydrate and selenium dioxide to 50 mL of eutectic ionic liquid In the type ionic liquid, the ionic liquid cobalt salt-selenium dioxide electrolyte system with a cobalt concentration of 0.05mol / L and a selenium concentration of 0.01mol / L was obtained after fully stirring and mixing;

[0024] (2) Surface treatment of the working electrode: take the copper substrate as the working electrode, wash it repeatedly with dilute hydrochloric acid with a mass percentage concentration of 1%, ultrasonication with absolute ethanol, and deionized water, and then dry it for later use;

[0025] (3) Constant potential electrodeposition: use a three-electrode system, use a platinum e...

Embodiment 2

[0029] A method for preparing nanoporous cobalt selenide by electrodeposition in a deep eutectic ionic liquid, the specific steps of which are as follows:

[0030] (1) Electrolyte configuration: Mix choline chloride and urea evenly at a molar ratio of 1:2 to obtain a deep eutectic ionic liquid, then add cobalt chloride hexahydrate and selenium dioxide to 45mL eutectic ionic liquid In the type ionic liquid, the ionic liquid cobalt salt-selenium dioxide electrolyte system with a cobalt concentration of 0.05mol / L and a selenium concentration of 0.01mol / L was obtained after fully stirring and mixing;

[0031] (2) Surface treatment of the working electrode: take the copper substrate as the working electrode, wash it repeatedly with dilute hydrochloric acid with a mass percentage concentration of 1%, ultrasonication with absolute ethanol, and deionized water, and then dry it for later use;

[0032] (3) Constant potential electrodeposition: using a three-electrode system, using graph...

Embodiment 3

[0035] A method for preparing nanoporous cobalt selenide by electrodeposition in a deep eutectic ionic liquid, the specific steps of which are as follows:

[0036] (1) Electrolyte configuration: Tetramethylammonium chloride and acetamide were mixed uniformly at a molar ratio of 1:4 to obtain a deep eutectic ionic liquid, and then cobalt sulfate and selenium dioxide were added to 40 mL of a deep eutectic ionic liquid In the liquid, after fully stirring and mixing uniformly, an ionic liquid cobalt salt-selenium dioxide electrolyte system with a cobalt concentration of 0.05mol / L and a selenium concentration of 0.025mol / L is obtained;

[0037](2) Surface treatment of the working electrode: take the copper substrate as the working electrode, wash it repeatedly with dilute hydrochloric acid with a mass percentage concentration of 1%, ultrasonication with absolute ethanol, and deionized water, and then dry it for later use;

[0038] (3) Constant potential electrodeposition: using a t...

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Abstract

The invention discloses a method of preparing nano porous cobalt selenide in a low-eutectic ionic liquid via electrodeposition and belongs to the technical field of material preparation. The method includes steps of: 1) adding a cobalt salt precursor and SeO2 to the low-eutectic ionic liquid to form an electrodeposition solution; 2) employing a triple-electrode system, wherein a Pt electrode or agraphite electrode is an electro-deposition pair electrode, a silver wire electrode is a reference electrode, and copper or nickel is a working electrode, performing electrodeposition at 333-343 K toprepare a nano porous cobalt selenide thin film. In the method, the nano porous cobalt selenide is produced as a bifunctional electrode material for catalytically splitting water to separate hydrogen / oxygen. The material can be applied to alkaline solution in different concentrations and has stable performance. The preparation method has gentle conditions and simple operations, is easy to controland is good in product quality. The material has practical significance to industrial production and application and development of micron / nano cobalt selenide materials, and has a wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing nanoporous cobalt selenide by electrodeposition in a deep eutectic ionic liquid, belonging to the technical field of material preparation. Background technique [0002] Cobalt and its alloy catalytic materials have become one of the most studied water splitting catalyst materials due to their abundant reserves, low cost, high electrocatalytic water splitting activity and strong stability; selenium is one of the chalcogenide nonmetallic elements, It exists in the form of covalent bonds in metal selenides. The compound of transition metal cobalt and selenium has advantages in both catalytic performance and electrical conductivity. Under certain conditions, it is easy to form a special nanostructure, showing a high specific surface area, and at the same time, it is easy to generate atomic defects at the edge of the nanostructure. More highly efficient reactive active sites are provided, therefore, cobalt se...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B1/04C25B11/06B01J27/057
CPCC25B1/00C25B1/04C25B11/04B01J27/0573Y02E60/36
Inventor 张启波杨文强华一新徐存英李艳李坚
Owner KUNMING UNIV OF SCI & TECH
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