Three-dimensional nanometer tricobalt tetraoxide, preparation method and application

A technology of cobalt tetroxide and three-dimensional nanometer, which is applied in the field of preparation of electrochemical catalytic materials, can solve the problems of slow application development and low conductivity of cobalt-based materials, and achieve the effects of good electrocatalytic performance, high catalytic performance and good performance.

Active Publication Date: 2017-07-07
YANGZHOU UNIV
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Problems solved by technology

However, the strong corrosiveness of alkaline solution and its own low

Method used

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  • Three-dimensional nanometer tricobalt tetraoxide, preparation method and application
  • Three-dimensional nanometer tricobalt tetraoxide, preparation method and application
  • Three-dimensional nanometer tricobalt tetraoxide, preparation method and application

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[0026] 1. The preparation process and verification of three-dimensional nano-cobalt tetroxide.

[0027] (1) Add 1 g of cobalt acetate and 1 to 5 g of α-alanine to 100 mL of deionized water, stir and dissolve at room temperature, add 0.5 to 1 L of absolute ethanol to the solution, and centrifuge the above system after stirring to obtain a solid Dry naturally in the air to obtain the Co-MOF precursor.

[0028] figure 1 Scanning electron microscopy images of the Co-MOF precursors are shown.

[0029] It can be seen that the Co-MOF precursor obtained by simple room temperature stirring reaction has a uniform olive-shaped morphology, the particle length is about 500 nm, and the diameter is about 300 nm. And it can be observed that the surface of olive-shaped Co-MOF particles is not smooth, but has spiral sheet folds.

[0030] (2) The Co-MOF precursor is calcined in a tube furnace at an air atmosphere at a rate of 0.2-5°C / min to 300-800°C for 0.5-2 hours, and after natural cooling...

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Abstract

The invention discloses a three-dimensional nanometer tricobalt tetraoxide, a preparation method and an application, and belongs to the technical field of preparation of electrochemical catalytic materials. The method comprises the following steps: firstly, dissolving cobaltous acetate and alpha-alanine with deionized water; then adding absolute ethyl alcohol; stirring and centrifuging to obtain a solid; drying the solid to obtain a Co-MOF precursor; putting the Co-MOF precursor into a tubular furnace; calcining under an air atmosphere; and cooling to obtain the three-dimensional nanometer tricobalt tetraoxide. The three-dimensional nanometer tricobalt tetraoxide is in an olive-shaped slender particle shape, small particles are gathered on the surface of the three-dimensional nanometer tricobalt tetraoxide, and a cobalt-based coordination compound with uniform shape and high catalysis performance is obtained. In an OER test, preferable performance is displayed, and the three-dimensional nanometer tricobalt tetraoxide can be applied to electrochemical catalysis.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical catalytic materials. Background technique [0002] With the increase of human demand for energy and environmental issues, many researches on high-efficiency, low-cost, and environment-friendly energy conversion and generation storage have been triggered. Oxygen electrocatalysis is central to the development of efficient energy storage and conversion devices, such as metal-air batteries and regenerative fuel cells. However, this development is mainly hampered by kinetically slow reactions: oxygen evolution reaction (OER) and oxygen reduction reaction (ORR): 4OH - →2H 2 O+4e+O 2 / and its reverse reaction. [0003] So far, most OER and ORR catalysts are mostly platinum group metals, such as RuO 2 , IrO 2 and Pt. However, high cost and resource shortage as well as weak stability limit their wide application. Therefore, many researchers have devoted themselves to develop...

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Application Information

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IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9016H01M4/9075H01M4/9083Y02E60/50
Inventor 庞欢李欣冉魏积蕾郑莎莎肖潇
Owner YANGZHOU UNIV
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