Nickel-cobalt-iron ternary oxide water electrolysis composite material, preparation method and application thereof

A technology of ternary oxides and composite materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrolytic components, etc., can solve problems such as difficult control of morphology and electronic structure

Active Publication Date: 2021-04-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] The invention provides a high-efficiency nickel-cobalt-iron ternary oxide electrolyzed water composite material and its synthesis method and application, which solves the problems of morphology control and electronic structure regulation of nickel-cobalt-iron ternary oxide
[0006] Aiming at the problems of transition metal oxide morphology regu

Method used

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  • Nickel-cobalt-iron ternary oxide water electrolysis composite material, preparation method and application thereof
  • Nickel-cobalt-iron ternary oxide water electrolysis composite material, preparation method and application thereof
  • Nickel-cobalt-iron ternary oxide water electrolysis composite material, preparation method and application thereof

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Embodiment 1

[0042] (1) The preparation method of the nickel-cobalt composite hydroxide precursor is as follows: the nickel foam is ultrasonically cleaned with a mixed solution of acetone and hydrochloric acid for 20-30 minutes to remove the grease and oxide layer on the surface of the nickel foam. 0.291 g of cobalt nitrate hexahydrate, 0.29 g of nickel nitrate hexahydrate, 0.6 g of urea and 0.186 g of ammonium fluoride were dissolved in 30 ml of deionized water and stirred for 30 minutes to obtain solution A. Transfer the solution A to the reaction kettle, put the pre-treated nickel foam into the solution, put it in an oven, and react at 120 degrees Celsius for 6 hours. Wash with absolute ethanol for 3 to 4 times, put it in a vacuum oven and bake at 60 degrees Celsius for 12 hours to obtain the precursor of nickel-cobalt hydroxide, which is recorded as NiCo-OH@NF.

[0043](2) The preparation method of the nickel-cobalt-iron Prussian blue analogue precursor is as follows: 0.33 g of potassi...

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Abstract

The invention provides a nickel-cobalt-iron ternary oxide water electrolysis composite material, a preparation method and application thereof, the composite material is composed of nickel-cobalt-iron ternary oxide grown on foamed nickel in situ, the expression of the composite material is R-NiCoFeO@NF, and the invention belongs to the technical field of new energy material synthesis. A nickel-cobalt-iron ternary prussian blue analog growing on foamed nickel in situ is adopted as the template, the nickel-cobalt-iron ternary oxide with an electronic structure optimized inverse spinel structure is obtained through high-temperature calcination in air and subsequent hydrogen heat treatment. According to the synthesis method, the microstructure of the nickel-cobalt-iron ternary oxide can be effectively controlled, the electronic structure of the nickel-cobalt-iron ternary oxide is adjusted, and the regulation and control method of the electronic structure of the nickel-cobalt-iron ternary oxide is enriched. Meanwhile, the composite material also shows excellent electrocatalytic water decomposition activity, the overpotential of the composite material is only 245mV when the current density is 10mAcm<-2>, and the composite material is suitable for the field of new energy development.

Description

technical field [0001] The invention belongs to the field of new energy nanomaterial synthesis and electrochemical technology, and specifically relates to a high-efficiency nickel-cobalt-iron ternary oxide electrocatalytic water splitting composite material and its preparation method and application. Background technique [0002] Energy and environmental issues are two major problems plaguing human society at present. As a clean energy with high energy density and environmental protection, hydrogen energy has gradually become a good substitute for fossil energy. As an ideal hydrogen production technology, electrolysis of water is seriously affected by the high cost of catalysts and its development is slow. Therefore, the development of a cheap and efficient electrolysis catalyst for water has become an urgent problem to be solved. [0003] Transition metal oxides (TMOs) have shown excellent performance in the fields of optoelectronics, biology, and energy, and thus have att...

Claims

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Application Information

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IPC IPC(8): B01J23/755C25B1/04C25B11/091
CPCB01J23/002B01J23/755B01J35/0033C25B1/04C25B11/04B01J2523/00B01J2523/842B01J2523/845B01J2523/847Y02E60/36
Inventor 刘思远郭鹏陈红宇张金宝王浩伟王兆杰鲁效庆魏淑贤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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