Preparation method of Co0.1Ni0.75Se/rGO composite material and application thereof

Abstract

The invention relates to a preparation method of a Co0.1Ni0.75Se/rGO composite material and an application thereof. The preparation method of the composite material comprises the following steps: (1)dispersing graphene oxide in deionized water to from a uniform dispersion liquid A; (2) after uniformly dissolving nickel chloride hexahydrate and cobalt nitrate hexahydrate in deionized water, addingsodium selenite, slowly adding an ethanol amine solvent and hydrazine hydrate into the solution successively, and uniformly stirring the solution to obtain a mixed solution B; and (3) slowly adding the dispersion liquid A into the mixed solution B to be uniformly stirred and transferring the mixture to a reaction kettle, sealing the reaction kettle, putting the reaction kettle in an electric heating blowing drying box, heating the reaction kettle to 140 DEG C, carrying out a constant temperature reaction for 24 h, and centrifugalizing and washing the obtained product to prepare the compositematerial. By adopting a one-step hydrothermal method, the Co0.1Ni0.75Se/rGO composite material is synthesized controllably, and the product prepared by the method is excellent in electrochemical property and can be used for an electrocatalytic hydrogen evolution catalyst.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic-organic composite materials, in particular to the preparation and application of an electrocatalytic hydrogen evolution catalyst, more specifically, the invention relates to a Co 0.1 Ni 0.75 Preparation methods and applications of Se / rGO composites. Background technique [0002] Hydrogen is a clean and high-energy-density new energy. Compared with renewable clean energy such as wind energy and nuclear energy, hydrogen not only has simple preparation methods, low-cost production equipment, and is environmentally friendly, but also has high combustion calorific value and free products. Therefore, hydrogen has become the first choice of secondary energy in the future, and hydrogen production by electrolysis of water as an important method of hydrogen production has also received extensive attention. [0003] Electrocatalytic Hydrogen Evolution Recition (HER) is currently recognized...

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Problems solved by technology

[0004] At present, there are many reports on the preparation methods of Fe, Co, and Ni electrocatalytic hydrogen evolution catalysts, and many catalysts with excellent performance have been prepared in the prior art. These catalysts mainly include alloys, phosphides, and sulfides of Fe, Co, and Ni. , but the hydrogen evolution catalytic performance of these non-precious metal catalysts is generally lower than that of noble metal catalysts, and there are still defects of high production cost, low hydrogen evolution activity and chemical stability, which seriously reduce the electrocatalytic hydrogen evolution performance of the catalyst

Therefore, the development of a new type of electrocatalytic hydrogen evolution catalyst has become a research hotspot in the field of electrochemistry. Among them, composite catalysts based on molybdenum sulfide (including MoS 2 / In 2 S 3 Composite catalysts and MoS 2 / reduced graphene oxide composite catalyst) research is relatively extensive, but the preparation process of these catalysts is complex, the reaction conditions are harsh, and the production cost is high, and the overpotential and Tafel slope of these prepared catalysts are still high, which seriously affects the Hydrogen evolution catalytic performance

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