Carbon composite material modified by chalcogen compound and transition metal as well as preparation method and application of carbon composite material

Abstract

The invention provides a carbon composite material modified by a chalcogen compound and a transition metal as well as a preparation method and application of the carbon composite material. The preparation method comprises the following steps: adding a mixture of carbon nanotubes and the soluble chalcogen compound into a solvent, performing ultrasonic treatment to form a suspension liquid, adding the suspension liquid dropwise to the surface of a pretreated glassy carbon electrode, and performing natural drying to form a uniform carbon nanotube thin layer, so as to obtain a glassy carbon electrode modified by a mixture of the carbon nanotubes and the chalcogen compound; adding a transition metal salt and a supporting electrolyte into deionized water, and adjusting the pH to 0-13 by using sulfuric acid to obtain an electroplating solution; and placing the glassy carbon electrode modified with the mixture of the carbon nanotubes and the chalcogen compound into the electroplating solution,performing electroplating, performing washing by using water, and performing natural drying at normal temperature to obtain the final product. The method provided by the invention is simple in operation, and the obtained composite material has great advantages in catalysis of hydrogen evolution and energy conversion, and can be applied to the fields of electro-catalyzing water decomposition for hydrogen production and photoelectric conversion.

Description

technical field [0001] The invention belongs to the research field of nanocomposite materials, and in particular prepares modified carbon composite materials through a melting method and ultrasonic mixing method and obtains carbon composite materials modified by chalcogen compounds and transition metals through an electrodeposition method. Background technique [0002] The combustion of traditional fossil fuels such as coal and oil has brought about environmental problems such as acid rain, greenhouse effect, and smog, and fossil fuels are non-renewable resources that are increasingly depleted. Therefore, it is increasingly important to seek and develop ideal clean and efficient new energy sources, which is also one of the major energy issues to be solved in the new century. The fuel cell is in line with the requirements of the above-mentioned new energy. At present, the most mature cathode and anode catalysts used in commercial fuel cells are noble metals and their alloys....

AI Technical Summary

Problems solved by technology

At present, the most mature cathode and anode catalysts used in commercial fuel cells are noble metals and their alloys. However, the price of noble metals is extremely expensive and the storage is scarce, which makes the cost of fuel cell catalysts too high and hinders the further development of fuel cells.

In addition, in the oxygen environment of the cathode, the noble metal platinum is easily poisoned by carbon monoxide, which leads to a reduction in the catalytic life of the material.

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