Preparation method of Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst

A ni-fe-ce, catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of expensive metal catalysts, difficulty in large-scale application, single performance, etc., to achieve Good catalytic oxygen production effect, low cost, simple process route

Active Publication Date: 2018-08-24
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the high price of noble metal catalysts, the difficulty of large-scale application and the lack of performance

Method used

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  • Preparation method of Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst
  • Preparation method of Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst
  • Preparation method of Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (the molar ratio of Ni, Fe and Ce is 1:1:1):

[0024] (1) Solution preparation and pH adjustment Weigh Ni(NO 3 ) 2 •6H 2 O, Fe(NO 3 ) 3 •9H 2 O, Ce(NO 3 ) 3 •6H 2 O (mass ratio is 1:1.39:1.49), add 100mL distilled water (solid (g)~liquid (mL) ratio is 1:10), stir until dissolved, then weigh a certain amount of sodium bicarbonate (the amount of the substance is 2 times of metal ions), continue stirring to dissolve to obtain a clear solution. Then, dilute aqueous ammonia was added dropwise to adjust the pH of the solution to 8.0.

[0025] (2) Co-precipitation reaction Then, the solution was placed at 35°C, and the stirring reaction was continued for 18 hours.

[0026](3) Separation and purification of the product Take out the reaction solution, filter it with suction, wash it with distilled water several times until the washing solution is neutral, and finally wash it twice with absolute ethanol, then dry it in an oven at 60°C for 12 hours, and finally grind it ...

Embodiment 2

[0033] (the molar ratio of Ni, Fe and Ce is 5:3:1):

[0034] (1) Solution preparation and pH adjustment Weigh Ni(NO 3 ) 2 •6H 2 O, Fe(NO 3 ) 3 •9H 2 O and Ce(NO 3 ) 3 •6H 2 O (mass ratio 1:0.83:0.30), add 100mL of distilled water, stir until dissolved, then weigh a certain amount of sodium bicarbonate (the amount of the substance is twice that of the metal ion), continue to stir and dissolve to obtain a clear solution. Then, dilute aqueous ammonia was added dropwise to adjust the pH of the solution to 8.5.

[0035] (2) Co-precipitation reaction Then, the solution was placed at 30°C, and the stirring reaction was continued for 24 hours.

[0036] (3) Product separation and purification Take out the reaction solution, perform suction filtration, wash with distilled water several times in sequence until the washing solution is neutral, and finally wash twice with absolute ethanol to obtain a brown-yellow precipitate, and then place the brown-yellow precipitate in Dry it ...

Embodiment 3

[0043] (The molar ratio of Ni, Fe and Ce is 5:1:3):

[0044] (1) Solution preparation and pH adjustment Weigh Ni(NO 3 ) 2 •6H 2 O, Fe(NO 3 ) 3 •9H 2 O, Ce(NO 3 ) 3 •6H 2 Add O (mass ratio 1:0.28:0.89) into 100mL of distilled water, stir until dissolved, then weigh a certain amount of sodium bicarbonate (the amount of the substance is twice that of the metal ion), continue to stir and dissolve to obtain a clear solution. Then, dilute aqueous ammonia was added dropwise to adjust the pH of the solution to 8.5.

[0045] (2) Co-precipitation reaction Then, the solution was placed at 40°C, and the stirring reaction was continued for 12 hours.

[0046] (3) Product separation and purification Take out the reaction solution, perform suction filtration, wash with distilled water several times in sequence until the washing solution is neutral, and finally wash twice with absolute ethanol to obtain a brown-yellow precipitate, and then place the brown-yellow precipitate in Dry it...

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Abstract

The invention belongs to the technical field of synthesis of inorganic materials, and particularly provides a preparation method of a Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst. The method is characterized by directly taking metal salts including Ni(NO3)2.6H2O, Fe(NO3)3.9H2O and Ce(NO3)3.6H2O as raw materials, taking water as a solvent, and preparing the ternary compound sulfide catalyst by using a simple two-step method including coprecipitation and a hydrothermal method. According to the preparation method, any template agents or auxiliary additives do not need to be added during reacting; an obtained product does not need to be calcined and annealed again, and can be directly used as a catalyst; the prepared catalyst material is used for catalyzing the cracking of waterto generate oxygen; an environment-friendly and low-cost method is provided for oxygen evolution catalysis material development which is urgently needed at present; and a selectable catalyst materialis also provided for development of fuel cells.

Description

technical field [0001] The invention belongs to the technical field of inorganic material synthesis, in particular to a preparation method of a Ce-doped Ni-Fe-Ce ternary sulfide oxygen evolution catalyst. Background technique [0002] In recent years, with the increasing environmental pollution and energy crisis, the development of renewable green energy has become a hot spot. Hydrogen energy, as a new type of green energy, has attracted increasing attention because of its advantages such as easy storage, convenient transportation, and high efficiency. Similar to the conversion of solar energy into chemical energy under photosynthesis in nature, water splitting can produce clean hydrogen energy. A typical water splitting process is mainly divided into two half-reactions, hydrogen evolution (HER) at the cathode and oxygen evolution (OER) at the anodic end. Among them, the overpotential loss of the OER process is much higher than that of the HER process (usually several ti...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J37/10B01J37/03B01J37/20C25B11/04C25B1/06H01M4/86H01M4/90
CPCB01J27/043B01J37/031B01J37/10B01J37/20C25B1/04C25B11/04H01M4/8647H01M4/90Y02E60/36Y02E60/50
Inventor 雷英牟红罗欢黄仁兴张丹丹谢华明
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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