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MoSe2/Co0.85Se composite material for electrocatalytic water decomposition as well as preparation method and application thereof

A technology of co0.85se and composite materials, applied in chemical instruments and methods, electrolytic components, electrolytic processes, etc., can solve the problems of unpublished material stability related data, high cost of selenium dioxide, and inconspicuous catalytic effect, etc. Achieve the effect of facilitating subsequent application or testing, reducing energy and reducing impedance

Inactive Publication Date: 2017-08-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars have studied some materials about electrolytic water catalysts. Judging from the current situation, there are two major shortcomings in electrolytic water catalysts: the catalytic effect of materials is not obvious and the stability of materials is poor.
However, the cost of raw material selenium dioxide used in this invention is relatively high, and it needs to be heat-treated at high temperature, so the cost is relatively high; the catalytic effect is not good, and the current density is 54.5mA / cm 3 The corresponding overpotential is 0.3V, and the data related to the stability of the prepared material has not been disclosed
[0004] From the above, the catalytic effect of the electrolytic water catalyst in the prior art is not ideal, and the stability needs to be further improved

Method used

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  • MoSe2/Co0.85Se composite material for electrocatalytic water decomposition as well as preparation method and application thereof
  • MoSe2/Co0.85Se composite material for electrocatalytic water decomposition as well as preparation method and application thereof
  • MoSe2/Co0.85Se composite material for electrocatalytic water decomposition as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] A kind of MoSe for electrocatalytic water splitting 2 / Co 0.85 Se composite material, this composite material comprises MoSe 2 and Co 0.85 Composite composed of Se, MoSe in the composite material 2 The mass content is 50%, Co 0.85 The mass content of Se is 30%; the microscopic morphology of the composite material is: MoSe 2 / Co 0.85 Molybdenum selenide / cobalt selenide composite nanosheets are loaded on the micro / nanorods of the Se composite.

[0058] The MoSe 2 and Co 0.85 The length of the micro / nanorods of the Se composite is 1.5–3.5 μm, and the average diameter of the rods is 0.3 μm.

[0059] The aforementioned MoSe for electrocatalytic water splitting 2 / Co 0.85 The preparation method of Se composite material, comprises steps as follows:

[0060] (1) Dissolve 1.5mmol cobalt nitrate and 1.5mmol sodium molybdate in 35mL deionized water, stir at 30°C for 10 minutes to obtain a uniform solution A; add pretreated nickel foam, transfer to a clean reaction kettl...

Embodiment 2

[0068] A kind of MoSe for electrocatalytic water splitting 2 / Co 0.85 The preparation method of Se composite material, comprises steps as follows:

[0069] (1) Dissolve 1.5mmol cobalt nitrate and 1.5mmol sodium molybdate in 35mL deionized water, stir at 30°C for 10 minutes to obtain a uniform solution A; add pretreated nickel foam, transfer to a clean reaction kettle, and heat up To 160°C, keep warm for 10 hours. After natural cooling, it was alternately washed three times with deionized water and absolute ethanol, and dried in vacuum at 40°C for 5 hours to obtain the coated composite material precursor CoMoO 4 nickel foam;

[0070] (2) Dissolve 0.16g of sodium borohydride in 35mL of deionized water to obtain solution B; add 0.16g of selenium powder, and stir at 35°C under an argon atmosphere for 40 minutes to prepare reaction solution C; Add the nickel foam of the composite material precursor prepared in step (1) into the reaction solution C, and put it in a clean reactio...

Embodiment 3

[0072] A kind of MoSe for electrocatalytic water splitting 2 / Co 0.85 The preparation method of Se composite material, comprises steps as follows:

[0073] (1) Dissolve 1.5mmol cobalt nitrate and 1.5mmol sodium molybdate in 35mL deionized water, stir at 30°C for 10 minutes to obtain a uniform solution A; add pretreated nickel foam, transfer to a clean reaction kettle, Raise the temperature to 160°C and keep it warm for 10 hours; after natural cooling, alternately wash three times with deionized water and absolute ethanol respectively, and dry in vacuum at 40°C for 5 hours to obtain CoMoO coated with the composite material precursor 4 nickel foam;

[0074](2) Dissolve 0.16g of sodium borohydride in 35mL of deionized water to obtain solution B; add 0.16g of selenium powder, and stir at 45°C under an argon atmosphere for 50 minutes to obtain reaction solution C; Add the nickel foam of the composite material precursor prepared in step (1) into the reaction solution C, and put i...

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Abstract

The invention relates to a MoSe2 / Co0.85Se composite material for electrocatalytic water decomposition. The microtopography of the composite material is that a micron / nano rod of a MoSe2 / Co0.85Se compound is loaded with a nano sheet of a molybdenum selenide / cobaltous selenide compound; the micron / nano rod has the length of is 1.5 to 3.5 microns and a diameter of 0.2 to 0.5 micron. A composite-material precursor CoMoO4 is firstly prepared and obtained through a hydrothermal reaction by using cobalt nitrate and sodium molybdate as reactive raw materials; afterwards, the composite material is made through the hydrothermal reaction by using sodium borohydride, selenium powder and the prepared composite-material precursor as raw materials. A preparation method of the MoSe2 / Co0.85Se composite material is simple; the raw materials are easily obtained; the cost is low; the industrialized production is easily realized; the prepared and obtained composite material is good in electrocatalytic effect, and further, has favorable stability.

Description

technical field [0001] The invention relates to a MoSe for electrocatalytic water splitting 2 / Co 0.85 The Se composite material and its preparation method and application belong to the technical field of micro-nano material preparation. Background technique [0002] Energy is the basic factor that determines social stability, progress and development. The current human dependence on fossil energy has caused serious environmental problems, and the non-renewable nature of fossil energy will become a stumbling block to human progress. Therefore, we are looking for a new Renewable energy has become the urgent hope of people. The storage of water resources on the earth is very abundant, and hydrogen, the product of electrolyzed water, will not produce harmful substances after combustion. Therefore, hydrogen energy, as an efficient and clean new energy source, has become a research hotspot in recent years. Therefore, there is an urgent need for an efficient and stable electroc...

Claims

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Application Information

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IPC IPC(8): B01J27/057C25B1/04C25B11/06
CPCB01J27/0573C25B1/04C25B11/04Y02E60/36
Inventor 田斌王家海
Owner SHANDONG UNIV
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