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Preparation method of sulfur doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen

A technology of hydroxide and nano-film, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of low cost, good catalytic effect and simple method

Inactive Publication Date: 2016-09-28
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation methods of nickel-iron composite component catalysts mainly include hydrothermal method and sol-gel method, and the research on the preparation of sulfur-doped Ni-Fe hydroxide materials by electrochemical methods and the catalytic electrode materials for electrolysis of water No report

Method used

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  • Preparation method of sulfur doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen
  • Preparation method of sulfur doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen
  • Preparation method of sulfur doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Mix the following raw materials evenly to prepare electrodeposition solution:

[0030]

[0031]

[0032] 2. Take the nickel foam substrate as the working electrode, the carbon rod as the counter electrode, and the Ag / AgCl electrode (3mol / L KCl) as the reference electrode, put it into the electrodeposition solution prepared in step 1, and conduct electrodeposition by cyclic voltammetry. The scanning range is -1.2~0.2V, the scanning rate is 5mV / s, and the cycle is 25 times, and the sulfur-doped Ni-Fe hydroxide nano-film catalyst is directly deposited on the surface of the nickel foam substrate. Depend on Figure 1~4 It can be seen that the nanofilm deposited on the surface of nickel foam contains Ni, Fe, S and O elements, and the XPS spectrum is calibrated by the C 1s (284.8eV) standard, in which Ni and Fe mainly exist in divalent forms, while S is mainly sulfur Urea decomposes to form sulfate and sulfur, which proves that the prepared nano-film is Ni-Fe hydroxi...

Embodiment 2

[0034] 1. Mix the following raw materials evenly to prepare electrodeposition solution:

[0035]

[0036] 2. Take the nickel foam substrate as the working electrode, the carbon rod as the counter electrode, and the Ag / AgCl electrode (3mol / L KCl) as the reference electrode, put it into the electrodeposition solution prepared in step 1, and conduct electrodeposition by cyclic voltammetry. The scanning range is -1.4~0V, the scanning rate is 10mV / s, and the cycle is 40 times, and the sulfur-doped Ni-Fe hydroxide nano-film catalyst is directly deposited on the surface of the nickel foam substrate.

Embodiment 3

[0038] 1. Mix the following raw materials evenly to prepare electrodeposition solution:

[0039]

[0040]

[0041] 2. Take the nickel foam substrate as the working electrode, the carbon rod as the counter electrode, and the Ag / AgCl electrode (3mol / L KCl) as the reference electrode, put it into the electrodeposition solution prepared in step 1, and conduct electrodeposition by cyclic voltammetry. The scanning range is -1 to 0.3V, the scanning rate is 15mV / s, and the cycle is 50 times, and the sulfur-doped Ni-Fe hydroxide nano-film catalyst is directly deposited on the surface of the nickel foam substrate.

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PUM

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Abstract

The invention discloses a preparation method of a sulfur doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen. According to the method, an aqueous solution which contains NiCl2, FeCl2, thiocarbamide and polyethylene glycol 1,000 is used as electrodeposition liquid, and a sulfur doped Ni-Fe hydroxide nano-film catalyst is directly electro-deposited on the surface of a metal strip or a foam metal substrate by an electrodeposition method. The preparation method is simple, the cost is low, the obtained catalyst is used for catalyzing decomposition of water to produce oxygen, a function of reducing overpotential of oxygen evolution of electrolysed water is good under larger current density, the catalytic activity is high, and the catalyst cannot drop from the surface of the substrate easily.

Description

technical field [0001] The invention belongs to the technical field of preparing oxygen catalytic electrode materials by electrolyzing water, and in particular relates to a preparation method of a sulfur-doped Ni-Fe hydroxide nano-film catalyst for decomposing water to produce oxygen. Background technique [0002] At present, the most effective way to produce oxygen with low cost and high purity is through electrocatalytic or photocatalytic water splitting. Water oxidation reaction is an important reaction to catalyze water splitting, and this step involves four electron transfer processes, which eventually generate oxygen-oxygen bonds. However, the reaction rate is very slow in this reaction process, and it is necessary to use a catalyst to reduce the activation energy and speed up the reaction rate. Industrially, ruthenium oxide or iridium oxide is used as the anode for electrocatalytic water splitting electrodes, but the small reserves and high cost of precious metals li...

Claims

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Application Information

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IPC IPC(8): C25D9/04C25B1/04C25B11/06B01J27/043
CPCC25B1/04C25D9/04B01J27/043C25B11/075B01J35/59Y02E60/36
Inventor 王增林雷占武
Owner SHAANXI NORMAL UNIV
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