FeS-NiS nano sheet array oxygen evolution catalyst and preparation method and applications thereof

A nanosheet array, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high scarcity and cost constraints, and achieve easy materials and high electrochemical conductivity. , the effect of high surface roughness

Active Publication Date: 2019-06-07
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ruthenium oxide and iridium oxide are the best OER catalysts, but their scarcity and high cost limit their wide application

Method used

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  • FeS-NiS nano sheet array oxygen evolution catalyst and preparation method and applications thereof
  • FeS-NiS nano sheet array oxygen evolution catalyst and preparation method and applications thereof
  • FeS-NiS nano sheet array oxygen evolution catalyst and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of NiFe-LDH precursor by hydrothermal method: ① 0.58gNi(NO 3 ) 2 ·6H 2 O, 0.09g Fe(NO 3 ) 3 9H 2 O, 0.60g urea and 0.22g NH 4 F was put into 40mL deionized water and stirred vigorously for 10min to obtain a mixed solution. ② Put the pretreated titanium mesh (2cm×4cm) into ② to prepare a mixed solution and transfer it to a polytetrafluoroethylene autoclave, and keep it warm at 120°C 6h, take it out after cooling to room temperature, rinse with water, and then dry in air at 60°C for 6h to prepare the NiFe-LDH precursor;

[0031] (2) Preparation of FeS-NiS / TM: 1.92g Na 2 Dissolve S in 40 mL deionized water to prepare Na 2 S solution, put the NiFe-LDH precursor prepared in step (1) into Na 2 The S solution was transferred together into a polytetrafluoroethylene autoclave, kept at 120°C for 4h, cooled to room temperature, taken out, rinsed with water, and then dried in air at 60°C for 6h to obtain the finished FeS-NiS / TM product.

Embodiment 2

[0033] (1) Preparation of NiFe-LDH precursor by hydrothermal method: ① 0.6gNi(NO 3 ) 2 ·6H 2 O, 0.15g Fe(NO 3 ) 3 9H 2 O, 0.4g urea and 0.10g NH4 F was put into 40mL deionized water and stirred vigorously for 10min to obtain a mixed solution. ② Put the pretreated titanium mesh (2cm×4cm) into ② to prepare a mixed solution and transfer it to a polytetrafluoroethylene autoclave, and keep it warm at 100°C 8h, take it out after cooling to room temperature, rinse with water, and then dry in air at 45°C for 12h to prepare the NiFe-LDH precursor;

[0034] (2) Preparation of FeS-NiS / TM: 0.3gNa 2 Dissolve S in 40 mL deionized water to prepare Na 2 S solution, put the NiFe-LDH precursor prepared in step (1) into Na 2 The S solution was transferred together into a polytetrafluoroethylene autoclave, kept at 100°C for 8h, cooled to room temperature, taken out, rinsed with water, and then dried in air at 45°C for 12h to obtain the finished FeS-NiS / TM product.

Embodiment 3

[0036] (1) Preparation of NiFe-LDH precursor by hydrothermal method: ① 0.8gNi(NO 3 ) 2 ·6H 2 O, 0.10g Fe(NO 3 ) 3 9H 2 O, 0.5g urea and 0.22g NH 4 F was put into 40mL deionized water and stirred vigorously for 10min to obtain a mixed solution. ② Put the pretreated titanium mesh (2cm×4cm) into ② to prepare a mixed solution and transfer it to a polytetrafluoroethylene autoclave, and keep it warm at 150°C 5h, take it out after cooling to room temperature, rinse with water, and then dry in air at 50°C for 12h to prepare the NiFe-LDH precursor;

[0037] (2) Preparation of FeS-NiS / TM: 0.3gNa 2 Dissolve S in 40 mL deionized water to prepare Na 2 S solution, put the NiFe-LDH precursor prepared in step (1) into Na 2 The S solution was transferred together into a polytetrafluoroethylene autoclave, kept at 150°C for 5h, cooled to room temperature, taken out, rinsed with water, and then dried in air at 50°C for 10h to obtain a finished FeS-NiS / TM product.

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Abstract

The invention belongs to the field of novel nano materials, and specifically relates to a FeS-NiS nano sheet array oxygen evolution catalyst and a preparation method thereof. The catalyst is obtainedby loading a FeS-NiS nano sheet array on the surface of a titanium mesh (TM) substrate. The preparation method comprises following steps: preparing a NiFe-LDH precursor: preparing a mixed solution from Ni(NO3)2.6H2O, Fe(NO3)3.9H2O, urea, and NH4F, putting a titanium mesh into the mixed solution, carrying out hydrothermal reactions to obtain the NiFe-LDH precursor; adding prepared NiFe-LDH precursor into a Na2S solution, and carrying out hydrothermal sulfurization reactions to obtain the catalyst. The prepared catalyst has an excellent electrocatalytic performance under an alkaline condition, is durable, and is a novel, stable and efficient oxygen evolution catalyst.

Description

technical field [0001] The invention belongs to the field of new nanometer materials, and in particular relates to a FeS-NiS nanosheet array oxygen evolution catalyst and its preparation method and application. Background technique [0002] With the rapid increase in energy demand and the environmental problems caused by the consumption of fossil energy, relevant policies have been promulgated in various countries to promote the conversion of clean energy. As a kind of combustion product, hydrogen is non-polluting, and the earth's abundant clean energy has attracted widespread attention. Electrochemical water splitting is considered to be one of the promising means for large-scale hydrogen production, and highly efficient catalysts are essential for this pathway. Currently, noble metal Pt-based catalysts are the most excellent hydrogen evolution reaction (HER) catalysts, but their high cost and small reserves limit their large-scale applications. Therefore, it is of great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C25B1/04C25B11/06
CPCY02E60/36
Inventor 孔荣梅栾晓倩杜蕙同
Owner QUFU NORMAL UNIV
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