Two-step preparation method of nitrogen-doped carbon-loaded cobaltosic oxide particle catalyst

Abstract

The invention relates to the field of energy materials, and discloses a two-step preparation method of a nitrogen-doped carbon-loaded cobaltosic oxide particle catalyst in order to solve the problemsthat in the high-temperature pyrolysis process, carbon atoms can reduce cobaltosic oxide, and the number of active components is reduced. The preparation method comprises the following steps: adding acobalt source and a nitrogen source into deionized water, adding a carbon source after complete dissolution, and carrying out uniform ultrasonic dispersion; reacting the prepared solution under the condition of 170-190 DEG C; sequentially carrying out suction filtration and drying on the obtained sample at room temperature; and uniformly grinding the obtained sample, and carrying out high-temperature pyrolysis in argon to obtain a finished product. Biomass carbon source glucose and derivatives thereof, urea and cobalt sulfate are used as precursors, nitrogen-doped carbon-loaded cobaltosic oxide is prepared through two steps of hydrothermal-pyrolysis, the problem that cobaltosic oxide is reduced in the pyrolysis process is effectively reduced, and the number of active sites on the surfaceof the catalyst is ensured.

Description

technical field [0001] The invention belongs to the field of energy materials, and in particular relates to a two-step method for preparing a nitrogen-doped carbon-loaded tricobalt tetroxide particle catalyst. Background technique [0002] With the massive consumption of fossil energy, environmental problems are becoming increasingly serious, and the development of high-efficiency, low-pollution clean energy is of great significance for achieving sustainable development. Fuel cells and metal-air batteries based on electrochemical energy conversion technology have attracted the attention of researchers because of their advantages of cleanliness, high efficiency, and reactions not limited by the Carnot cycle. However, the reaction process of oxygen on the electrode surface of this type of battery is slow, and a noble metal catalyst is often required to accelerate the reaction, resulting in an increase in the cost of the battery. Therefore, it is of great significance to study...

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Problems solved by technology

[0006] The present invention aims to overcome the problem that carbon atoms will reduce cobalt tetroxide during the pyrolysis process in the prior art and reduce the number of active components, and provides a two-step method for preparing a nitrogen-doped carbon-supported cobalt tetroxide particle catalyst. The carbon source can make the carbon carrier have enough oxygen-containing functional groups to consume during pyrolysis, which greatly improves the thermal stability of cobalt tetroxide at high temperature; retains the active components in full contact with the reactants to improve the reaction efficiency

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