3results about How to "Improve electrocatalytic efficiency" patented technology

The present application relates to a kind of carbon nanotube-Fe base hydrogen production electrocatalyst and application, belong to water electrolysis hydrogen production technical field.The present application is mainly realized by the following steps: one, current collector surface pretreatment;Two, solvothermal synthesis Fe base precursor;Three, in situ preparation carbon nanotube-Fe base electrocatalyst under chemical vapor deposition;Four, electrochemical in situ activation.The present application proposes carbon nanotube-Fe base composite electrocatalytic structure in situ construction on the surface of conductive current collector for the first time.Under the synergistic effect of each parameter in preparation process, the obtained structure not only can give full play to the conductive and structural advantages of carbon nanotube, but also can regulate the electronic structure of Fe base active site through interface coupling effect, so as to significantly improve the performance of water electrolysis hydrogen production.Compared with prior art, in situ preparation electrocatalyst is in situ bonded with current collector and has good dispersibility, and carbon nanotube-Fe base electrocatalyst is conducive to forming conductive network and improving electrocatalytic efficiency.

The application discloses a copper-based compound for electrocatalytic sulfur ion oxidation assisted hydrogen production and a preparation method and application thereof, and belongs to the field of electrochemical catalysis. The method comprises the following steps: S1, dissolving copper nitrate in a solvent under ultrasonic stirring to configure a copper salt solution, immersing pretreated foamed nickel in the copper salt solution to obtain a mixture; S2, sealing the mixture in a stainless steel autoclave with a polytetrafluoroethylene liner, and performing a reaction under heating; S3, after the reaction, cooling to room temperature, cleaning the foamed nickel after the reaction with deionized water, and drying to obtain a product Cu2(OH)3NO3@NF, which solves the problems of existing catalyst deactivation and surface passivation caused by accumulation of elemental sulfur or polysulfides on active sites.

This invention discloses a two-dimensional porous carbon material, its preparation method, and its application, belonging to the field of water electrolysis for hydrogen production technology. The preparation method of the two-dimensional porous carbon material is as follows: a polyacrylamide solution, a reducing agent, a sulfur-containing compound, and a metal salt are stirred to form a gel-like spatial network structure, followed by a microwave hydrothermal reaction to obtain a precursor; the precursor is dissolved in a water-soluble salt to obtain a mixed solution, which is then freeze-dried to obtain a mixture; the mixture is annealed, and after annealing, it is washed with water to obtain the two-dimensional porous carbon material. The two-dimensional porous carbon material prepared by this invention possesses excellent conductivity and a continuous electron transport path, providing a sufficient electrode / electrolyte interface for the electrocatalytic hydrogen evolution reaction and improving the electrocatalytic efficiency of sulfides.