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Iron-doped tellurium nickel sulfide electrocatalyst and preparation method thereof

A technology of tellurium sulfide and iron doping, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of difficult electrocatalytic performance and performance to be improved, achieve high electrocatalytic activity, increase electrochemical Good surface area and oxygen evolution effect

Active Publication Date: 2020-12-18
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there have been many researches on the application of non-noble metal chalcogenides to the oxygen evolution performance. Among many transition metal sulfides, metal sulfides are widely used in the field of electrocatalysis because of their high conductivity. However, how to improve their electrocatalysis Performance is still a problem
Recently, there are more and more applications of iron-nickel non-noble metal materials in electrocatalysis. For example, the invention patent of publication number CN110368944A has studied a kind of α-NixFey(OH) 2 Nanosheet electrocatalyst, the electrocatalyst has excellent oxygen evolution performance, when x:y=1:3, at a current density of 10mA cm -2 , the overpotential is as low as 287mV, and the Tafel slope is 54.4mV dec -1 ; But there is still a long way to go from industrialization, and its performance needs to be improved

Method used

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  • Iron-doped tellurium nickel sulfide electrocatalyst and preparation method thereof
  • Iron-doped tellurium nickel sulfide electrocatalyst and preparation method thereof
  • Iron-doped tellurium nickel sulfide electrocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] 1. Pretreatment of nickel foam

[0033] The nickel foam was activated with 3mol / L hydrochloric acid solution at 60°C for half an hour, followed by ultrasonic cleaning with ethanol and deionized water for 10 minutes.

[0034] 2. Weighing of telluride, nickel compound and iron compound

[0035] Weigh 0.0665g of sodium tellurite, 0.7272g of iron nitrate, and 0.3490g of nickel nitrate into a 50mL reaction kettle.

[0036] 3. Weighing of sulfide

[0037] Put the iron-nickel-tellurium composite grown on the surface of nickel foam into a 50mL reactor containing 0.6g of sodium sulfide.

[0038] Preparation of 4.1mol / L KOH solution

[0039] Weigh 28.055g of potassium hydroxide into a 100mL beaker, add distilled water, dissolve and stir with a glass rod, transfer to a 500mL volumetric flask to constant volume after cooling.

[0040] 5. Preparation of iron-doped tellurium nickel sulfide electrocatalysts with different iron and nickel contents grown on the surface of nickel foa...

Embodiment 2

[0046] 1. Pretreatment of nickel foam

[0047] The nickel foam was activated with 3mol / L hydrochloric acid solution at 60°C for half an hour, followed by ultrasonic cleaning with ethanol and deionized water for 10 minutes.

[0048] 2. Weighing of telluride, nickel compound and iron compound

[0049] Weigh 0.0665g of sodium tellurite, 1.0908g of iron nitrate, and 0.0872g of nickel nitrate into a 50mL reaction kettle.

[0050] 3. Weighing of sulfide

[0051] Put the iron-nickel-tellurium composite grown on the surface of nickel foam into a 50mL reactor containing 0.6g of sodium sulfide.

[0052] Preparation of 4.1mol / L KOH solution

[0053] Weigh 28.055g of potassium hydroxide in a 100mL beaker, add distilled water, dissolve and stir with a glass rod, transfer to a 500mL volumetric flask to constant volume after cooling.

[0054] 5. Preparation of iron-doped tellurium nickel sulfide electrocatalysts with different iron and nickel contents grown on the surface of nickel foam ...

Embodiment 3

[0060] 1. Pretreatment of nickel foam

[0061] The nickel foam was activated with 3mol / L hydrochloric acid solution at 60°C for half an hour, followed by ultrasonic cleaning with ethanol and deionized water for 10 minutes.

[0062] 2. Weighing of telluride, nickel compound and iron compound

[0063] Weigh 0.0665g of sodium tellurite, 0.1212g of iron nitrate, and 0.0872g of nickel nitrate into a 50mL reaction kettle.

[0064] 3. Weighing of sulfide

[0065] Put the iron-nickel-tellurium composite grown on the surface of nickel foam into a 50mL reactor containing 0.6g of sodium sulfide.

[0066] Preparation of 4.1mol / L KOH solution

[0067] Weigh 28.055g of potassium hydroxide in a 100mL beaker, add distilled water, dissolve and stir with a glass rod, transfer to a 500mL volumetric flask to constant volume after cooling.

[0068] 5. Preparation of iron-doped tellurium nickel sulfide electrocatalysts with different iron and nickel contents grown on the surface of nickel foam ...

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Abstract

The invention belongs to the technical field of electrochemical energy conversion, and particularly relates to a preparation method and application of a high-performance iron-doped tellurium nickel sulfide hydrolysis electrocatalyst. The preparation method of the electrocatalyst provided by the invention comprises the following steps: activating foamed nickel (substrate), synthesizing a precursorby a hydrothermal method, carrying out further sulfurization, and carrying out secondary hydrothermal treatment to obtain the iron-doped tellurium-nickel sulfide composite material with a three-dimensional nano reticular structure. The electrocatalyst provided by the invention is used as an anode catalytic material, has very high electrocatalytic oxygen evolution performance under an alkaline condition, and is derived from strong interaction between Fe and Ni, so that active sites of oxygen evolution reaction are increased, and the porous structure of the foamed nickel is more beneficial to electron and proton transmission. Meanwhile, the iron-doped tellurium-nickel sulfide composite material is prepared by using a twice hydrothermal method, so that the iron-doped tellurium-nickel sulfidecomposite material has excellent catalytic activity and electrochemical stability, is simple in method, mild in synthesis condition, green and environment-friendly, does not need very high energy consumption, and has great potential in practical application.

Description

technical field [0001] The invention relates to an iron-doped tellurium nickel sulfide electrocatalyst and a preparation method thereof, belonging to the technical field of electrochemical energy conversion and nanometer materials, and in particular to an iron-doped tellurium nickel sulfide electrocatalyst and a preparation method thereof. Background technique [0002] Compared with traditional fuels, such as coal, oil, and natural gas, which are non-renewable energy sources, hydrogen energy, as a green, environmentally friendly, and pollution-free energy source, has increasingly become a research hotspot for researchers. Electrolysis of water is an effective way to produce hydrogen and oxygen, and the process of oxygen evolution requires four electrons and four protons, which requires higher energy consumption. Therefore, it has become a key step to be solved in the complete water splitting. In previous studies, noble metal (Ru and Ir) compounds were used in the OER process...

Claims

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Application Information

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IPC IPC(8): B01J27/057C25B1/04C25B11/06
CPCB01J27/0576C25B1/04B01J35/33Y02E60/36
Inventor 王海人尹习习王麒钧
Owner HUBEI UNIV
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