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Method for preparing efficient hydrolysis metal sulfide electrode material through one-step method

A metal sulfide and electrode material technology, applied in the direction of metal material coating process, electrode, electrode shape/type, etc., can solve the difficult to control shape and composition, increase electrical conductivity and mass transfer performance, electrical conductivity and mass transfer performance Poor problems, to achieve the effect of improving conductivity and electron transfer efficiency, improving catalytic performance, and good contact

Inactive Publication Date: 2018-05-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these materials have poor electrical conductivity, high overpotential, and poor durability. The synthesis process takes a long time and costs a lot, and it is difficult to control the morphology and composition.
The shortcomings such as the above-mentioned poor conductivity and mass transfer performance limit the catalytic efficiency of these materials. In order to avoid the above problems, the present invention considers that the metal sulfide is directly loaded on the foamed nickel, so that the catalyst active component is directly connected with the carrier to increase its conductivity. and mass transfer performance

Method used

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  • Method for preparing efficient hydrolysis metal sulfide electrode material through one-step method
  • Method for preparing efficient hydrolysis metal sulfide electrode material through one-step method
  • Method for preparing efficient hydrolysis metal sulfide electrode material through one-step method

Examples

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Effect test

Embodiment 1

[0026] Clean the nickel foam (1.5cm×1.0cm×0.15cm) ultrasonically with 3M HCl solution for 30 minutes, and then use absolute ethanol, acetone and deionized water to ultrasonically clean the nickel foam for 15 minutes to ensure its surface is clean. Wrap a piece of nickel foam cleaned according to the above steps with polytetrafluoroethylene, and the exposed area is about 1cm 2 , immerse it in a 250mL Teflon-lined stainless steel reactor containing 20mL of the mixed solution (the mixed solution contains ethanol, deionized water, ammonium tetrathiomolybdate, and urea), and perform ultrasonic treatment for 30min, wherein ethanol and deionized The volume ratio of water is 1:1, ammonium tetrathiomolybdate and urea are respectively 0.1 g and 0.3 g. The mixed product was put into a sealed autoclave for hydrothermal operation, heated from room temperature to 170°C at a rate of 2°C / min, and kept for 6h. After the reaction, wait for the autoclave to cool down to room temperature, rinse ...

Embodiment 2

[0032] Clean the nickel foam (1.5cm×1.0cm×0.15cm) ultrasonically with 3M HCl solution for 30 minutes, and then use absolute ethanol, acetone and deionized water to ultrasonically clean the nickel foam for 15 minutes to ensure its surface is clean. Wrap a piece of nickel foam cleaned according to the above steps with a Teflon tape, and the exposed area is about 1cm 2 , immerse it in a 250mL Teflon-lined stainless steel reaction kettle containing 20mL of the mixed solution (the mixed solution contains ethanol, deionized water, WCl 4, urea), ultrasonic treatment for 30min, wherein the volume ratio of ethanol to deionized water is 1:1, WCl 4 and urea are 0.15g and 0.3g respectively. The mixed product was put into a sealed autoclave for hydrothermal operation, heated from room temperature to 180°C at a rate of 2°C / min, and kept for 6h. After the reaction, wait for the autoclave to cool down to room temperature, rinse the obtained sample with deionized water, and then dry it in an...

Embodiment 3

[0038] Controllable preparation of polycrystalline MoS by solid-state reaction 2 , mixed high-purity fine powder Mo (99.9%) with S (99.999%) in a suitable stoichiometric ratio, and thoroughly ground, then granulated in a sealed vacuum quartz tube, and heated from room temperature at a rate of 1 °C / min To 600 ℃, keep 120h. The nickel foam (1.5cm×1.0cm×0.15cm) was ultrasonically cleaned with 3M HCl solution for 30min, and then the nickel foam was ultrasonically cleaned with absolute ethanol, acetone and deionized water for 15min to ensure its surface was clean. MoS can be made by a simple one-step hydrothermal operation 2 Nanoflower arrays are grown on nickel foam supports. Wrap a piece of nickel foam with Teflon tape, and the exposed area is about 1cm 2 , and then immersed it in a solution containing ethanol (20 mL) and MoS 2 (0.2g) powder in a polytetrafluoroethylene-lined stainless steel reactor for 30min. Then carry out hydrothermal operation in a sealed autoclave, heat...

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Abstract

The invention discloses a method for preparing an efficient hydrolysis metal sulfide electrode material through a one-step method. The method includes the following steps that nickel foam obtained after ultrasonic treatment serves as a carrier and is soaked into a high pressure reactor containing metal sulfide and a precursor, a hydrothermal reaction is made at 140 DEG C-200 DEG C so that the metal sulfide can be loaded on the nickel foam, and reacting is carried out for 6 h. the method has the following beneficial effects that (1) the three-dimensional porous metal sulfide is directly synthesized without the help of a template, the hydrolysis hydrogen evolution and oxygen evolution catalytic activity site density is high, the electronic transferring path is short, and the catalytic performance is good; (2) the metal sulfide of a nano-structure is directly connected with the electrical conductive nickel foam carrier, the contact and the electrical conductivity are good, the specific conductance and the electron transferring efficiency are better improved, and overpotential needed by energy barriers is reduced to a large extent; and (3) electrolyte can enter the interior of the porous electrode material easily, the electric current density is high, the crystal structure is stable, and the circulated stability and durability of the material are greatly improved.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic water splitting, in particular to a method for preparing efficient water splitting metal sulfide electrode materials in one step. Background technique [0002] With the rapid consumption of fossil fuels and the increasing prominence of related environmental issues, it is crucial and urgent to develop economically viable and clean alternative energy sources. Hydrogen energy can be used as a clean alternative energy source, which has the advantages of high combustion calorific value, environmental protection, non-toxicity and secondary regeneration. At present, it seems that hydrogen energy can be obtained by electrocatalytic water splitting reaction. The key to this reaction is to develop efficient and low-cost catalysts to improve conversion efficiency and reduce costs. [0003] Electrocatalytic water splitting is divided into two half-reactions of hydrogen production and oxygen producti...

Claims

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Application Information

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IPC IPC(8): C23C18/12C25B11/06C25B11/03C25B1/04
CPCC23C18/1204C25B1/04C25B11/03C25B11/051C25B11/057C25B11/075Y02E60/36
Inventor 严凯刘雨倩
Owner SUN YAT SEN UNIV
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