Cobalt and nitrogen doped carbon nanotube as well as preparation method and application thereof

Abstract

The invention provides a cobalt and nitrogen doped carbon nanotube as well as a preparation method and application thereof. The preparation method comprises the steps: taking cobalt acetate, putting into an ethanol solution, stirring and dissolving, adding dicyandiamide into the solution after dissolution, continuing stirring, evaporating a solvent to dryness, and then drying to obtain a powdery precursor; and putting the powdery precursor into a mortar, grinding, transferring into a reaction container, heating a tubular furnace to 900-1000 DEG C, calcining for 0.5-2 h, annealing to obtain a sample, putting the sample into an inorganic acid solution, stirring overnight, carrying out suction filtration, washing, and drying to obtain the cobalt and nitrogen doped carbon nanotube. According to the synthesis method, secondary heat treatment is avoided in one-step synthesis, the synthesis method is simple, the cobalt and nitrogen doped carbon nanotube has high catalytic activity, and the catalyst can be used for a fuel cell cathode oxygen reduction reaction, and is good and uniform in morphology and complete in structure, has high initial potential and half-wave potential and has the potential of replacing a Pt-based catalyst.

Description

technical field [0001] The invention relates to the technical field of fuel cell catalysis, and more specifically relates to a cobalt- and nitrogen-doped carbon nanotube and a preparation method and application thereof. Background technique [0002] With the frequent occurrence of air pollution problems, people pay more and more attention to environmental protection. As a science and technology that effectively reduces the burning of fossil fuels and improves the atmospheric environment, clean energy has attracted the attention of researchers. However, the slow cathode reaction of fuel cells hinders its development process, so Pt-based catalysts emerged as the times require, but the limited storage capacity and expensive price of noble metals keep the cost of catalysts high, which raises the threshold for the use of fuel cells and affects its large-scale application. Therefore, the development of low-cost catalysts is even more important. M-N-C catalysts, as the best among...

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Problems solved by technology

[0005] However, the current research synthesis methods have complex pretreatment processes, such as hydrothermal synthesis and long-term mechanical grinding, etc. Many methods also require secondary heat treatment and re-annealing

The cumbersome process and processing steps have become one of the reasons for increasing the cost of materials and hindering the large-scale synthesis of catalysts

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