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A kind of preparation method and use of nickel-iron double metal hydroxide nano-film material

A technology of nano-film materials and hydroxides, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve cost savings, good conductivity, and multiple catalytic active sites point effect

Active Publication Date: 2022-07-01
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, electrodeposition has received little attention as a rapid preparation method for continuous Prussian blue films.

Method used

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  • A kind of preparation method and use of nickel-iron double metal hydroxide nano-film material
  • A kind of preparation method and use of nickel-iron double metal hydroxide nano-film material
  • A kind of preparation method and use of nickel-iron double metal hydroxide nano-film material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Treatment of carbon paper substrate

[0037] The carbon paper with a size of 0.5 × 1 cm was placed in 1 mol / L hydrochloric acid solution, acetone, and ethanol for ultrasonic cleaning for 10 min, respectively. The ultrasonically cleaned carbon paper was washed with deionized water and dried to obtain a usable carbon paper substrate.

[0038] Step 2: Preparation of carbon paper-supported Prussian blue nanofilm substrates

[0039] The Prussian blue nano-film material was prepared by cyclic voltammetry, and the carbon paper substrate obtained in step 1 was immersed in electrolyte A, where the molar concentration of ferric nitrate in electrolyte A was 0.5 mmol / L, and the molar concentration of potassium ferricyanide was 0.5 mmol / L. The molar concentration of potassium chloride is 0.5mmol / L, and the molar concentration of potassium chloride is 0.1mol / L, and then a carbon paper (0.5×0.5cm) working electrode, a platinum sheet counter electrode, and a saturated Ag / AgCl r...

Embodiment 2

[0045] Step 1: Treatment of carbon paper substrate

[0046] The carbon paper with a size of 0.5 × 1 cm was placed in 0.1 mol / L hydrochloric acid solution, acetone, and ethanol for ultrasonic cleaning for 5 minutes, respectively. The carbon paper after ultrasonic cleaning was cleaned with deionized water and dried to obtain a usable carbon paper substrate. .

[0047] Step 2: Preparation of carbon paper-supported Prussian blue nanofilm substrates

[0048] The Prussian blue nano-film material was prepared by cyclic voltammetry, and the carbon paper substrate obtained in step 1 was immersed in electrolyte A. The molar concentration of ferric nitrate in electrolyte A was 0.1 mmol / L and the molar concentration of potassium ferricyanide was 0.1 mmol / L. The molar concentration of potassium chloride is 0.1 mmol / L, and the molar concentration of potassium chloride is 0.01 mol / L, and then a carbon paper (0.5 × 0.5 cm) working electrode, a platinum sheet counter electrode, and a saturate...

Embodiment 3

[0054] Step 1: Treatment of carbon paper substrate

[0055] The carbon paper with a size of 0.5 × 1 cm was placed in 6 mol / L hydrochloric acid solution, acetone, and ethanol for ultrasonic cleaning for 15 min, respectively. The ultrasonically cleaned carbon paper was cleaned with deionized water and dried to obtain a usable carbon paper substrate.

[0056] Step 2: Preparation of carbon paper-supported Prussian blue nanofilm substrates

[0057] The Prussian blue nano-film material is prepared by cyclic voltammetry, and the carbon paper substrate obtained in step 1 is immersed in electrolyte A. The molar concentration of ferric nitrate in electrolyte A is 10 mmol / L, and the molar concentration of potassium ferricyanide is 10mmol / L, the molar concentration of potassium chloride is 3mol / L, and then a three-electrode system consisting of a carbon paper (0.5×0.5cm) working electrode, a platinum sheet counter electrode, and a saturated Ag / AgCl reference electrode is used. Cyclic vol...

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Abstract

The invention discloses a preparation method and application of a nickel-iron double metal hydroxide nano-film material. Taking carbon paper as a substrate, a two-step electrodeposition and a one-step etching method are used to prepare a nickel-iron double metal hydroxide electrocatalyst. In the first step, the Prussian blue nano-film material supported on carbon paper was obtained by electrodeposition, and the nickel hydroxide / Prussian blue nano-film material supported on carbon paper was obtained in the second step by electrodeposition. The blue nano-film material is etched in a strong alkaline solution to obtain a nickel-iron bimetallic hydroxide nano-film material supported on carbon paper. The method is simple, easy to operate, safe to operate, green and pollution-free. Second, the material is an amorphous, oxygen-vacancy-rich and porous nanofilm material with ultra-low overpotential and Tafel slope, showing excellent catalytic activity for oxygen evolution; During electrolysis, its potential remains almost unchanged, showing excellent electrolytic stability.

Description

technical field [0001] The invention belongs to the field of non-precious metal catalyst electrochemical decomposition of water to produce hydrogen and oxygen evolution, and in particular relates to a preparation method and application of a nickel-iron double-metal hydroxide nano-film material. Background technique [0002] With the increasing consumption of non-renewable energy and the increasingly serious problem of environmental pollution, people urgently need to use renewable and clean energy to replace fossil fuels, such as wind energy and solar energy. This can be achieved by vigorously developing efficient and low-cost energy conversion and storage technologies, such as renewable fuel cells, metal-air batteries, and water-splitting hydrogen production devices. Among them, the perfect closed loop of clean energy utilization is to use hydrogen as an energy substrate, electrolyze water to produce hydrogen through electricity generated by renewable clean energy, and use f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/06C25D9/04C25B1/04C25B11/065C25B11/075
CPCB01J23/755C25D9/04C25B1/04C25B11/051C25B11/075B01J35/59B01J35/33Y02E60/36
Inventor 蔡金光王双吕超胡存关宏泰曾甯罗军洪石岩宋江锋张志
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS