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Method for preparing CC (carbon cloth) supported nickel selenide on basis of solution method

A technology of nickel selenide and solution method, which is applied in the direction of chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of poor repeatability, waste of raw materials, and unsafety of electrodeposition methods, and achieve improved electrodeposition. Catalytic performance, reduced preparation cost, good catalytic performance

Inactive Publication Date: 2018-12-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high temperature and waste of raw materials in the chemical vapor deposition method in the current technology, the high pressure of the hydrothermal method and the solvothermal method, the problem of long time consumption and unsafety, and the problem of poor repeatability of the electrodeposition method. Provides a simple, quick, and low-cost method for preparing carbon cloth-loaded nickel selenide

Method used

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  • Method for preparing CC (carbon cloth) supported nickel selenide on basis of solution method
  • Method for preparing CC (carbon cloth) supported nickel selenide on basis of solution method
  • Method for preparing CC (carbon cloth) supported nickel selenide on basis of solution method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Drop-coating the precursor solution on the carbon cloth

[0028] The precursor solution is prepared by dissolving nickel hydroxide powder and selenium powder in a thiolamine solution at a molar ratio of 0.98 to 1.02, and the thiolamine solution is composed of ethylenediamine and ethanedithiol in a volume ratio of 4:1 Dissolved; the concentration of the precursor solution is 0.145mmol / mL;

[0029] Drop-coat 0.16mL precursor solution on a 1cm*1cm carbon cloth;

[0030] (2) Preparation of carbon cloth supported nickel selenide

[0031] The carbon onto which the precursor solution was drip-coated in step (1) was placed on a heating plate, and heated at 350°C for 60s, and finally carbon cloth supported nickel selenide (NiSe / CC) was obtained. X-ray diffraction pattern ( figure 1 ) in (100), (101), (102), (110), (103), (201) and (202) crystal planes correspond to the standard card JCPDS No.02-0892 respectively, and are proved to be phase-pure Nickel Selenide, showing t...

Embodiment 2

[0033] The other steps are the same as in Example 1, except that the heating temperature is changed from 350°C to 300°C and 400°C. As a result, nickel selenide supported on carbon cloth is also obtained, and the nickel selenide prepared under the condition of 300°C It is coated on carbon cloth (CC) in the form of nano-particle accumulation, but the coating is not complete, and part of the carbon cloth is exposed. The specific appearance is as follows figure 2 Shown in a; the prepared sample is applied to electrocatalysis, and its HER overpotential is -170mV. Compared with the HER overpotential of nickel selenide nanomaterials prepared by Wang Chunming's research group by electrodeposition method, the HER overpotential is reduced by 100mV, and the specific polarization curve of the sample is as follows: image 3 shown. In addition, nickel selenide prepared at 400°C is coated on carbon cloth (CC) in the form of nano-particle accumulation, and the carbon cloth is evenly wrapped...

Embodiment 3

[0035] Other steps are the same as in Example 1, except that the heating time is changed from 60s to 40s and 80s. As a result, nickel selenide supported on carbon cloth was also obtained, and the morphology was close to that of Example 1. Among them, the nickel selenide prepared under the condition of heating time of 40s is applied to electrocatalysis, and its HER overpotential is -145mV, compared with the HER overpotential of nickel selenide nanomaterials prepared by Zou Xiaoxin's group by hydrothermal method. The potential is reduced by 16mV; compared with the HER overpotential of nickel selenide nanomaterials prepared by Wang Chunming's research group by electrodeposition method, the HER overpotential is reduced by 125mV. The specific polarization curve of the sample is as follows Figure 4 shown. In addition, the nickel selenide prepared under the condition of heating time of 80s is applied to electrocatalysis, and its HER overpotential is -156mV, compared with the HER ov...

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Abstract

The invention discloses a method for preparing CC (carbon cloth) supported nickel selenide on the basis of a solution method. The method comprises steps as follows: a precursor solution is prepared asfollows: nickel hydroxide powder and selenium powder are dissolved in a hydrosulfamine solution in the mole ratio being 0.98-1.02, wherein the hydrosulfamine solution is formed by dissolving ethanediamine and dithioglycol in the volume ratio being 4:1, and the concentration of the precursor solution is 0.145 mmol / mL; the precursor solution is dropped on CC in the dropping amount of 0.14-0.2 mL / cm<2>; the CC is put on a heating plate to be heated at the temperature of 300-400 DEG C for 40-80 s, and CC supported nickel selenide (NiSe / CC) is obtained. The CC supported nickel selenide is preparedwith the solution method, a preparation process is greatly simplified, the preparation time is shortened greatly, and the preparation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing carbon cloth-supported nickel selenide (NiSe / CC) based on a solution method. Background technique [0002] With the rapid development of social economy and technology, people's dependence on energy is gradually deepening. At present, the energy needed by mankind, such as oil, natural gas, and coal, are non-renewable resources with limited stock on the earth, and the extensive use of fossil energy has caused serious environmental pollution, and human survival is always inseparable from energy, so we are looking for other alternatives High-efficiency and clean energy has become a concern of people. Solar energy, wind energy, nuclear energy and other energy sources are affected by factors such as geography and time to limit their large-scale application, while hydrogen has many advantages as an energy source. Firstly, hydrogen can be obtained by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/057B01J35/33Y02E60/36
Inventor 刘彩池陈秋颖李士云
Owner HEBEI UNIV OF TECH
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