Flexible loading type carbon fiber loaded CoB catalyst and preparation method thereof

Abstract

The invention discloses a flexible loading type carbon fiber loaded CoB catalyst and a preparation method thereof. The preparation method comprises the steps of arranging carbon fibers into a nitric acid solution being 90 DEG C, heating and activating; putting the carbon fibers which are activated through nitric acid into a silver ammonia solution, and impregnating for 4h at normal temperature for sensibilization; adding a sodium hydroxide solution into a plating solution prepared by mixing a cobalt precursor, tartaric acid, ammonium chloride and borax, adjusting the pH value of the plating solution, stirring uniformly, then adding sodium borohydride, completely soaking the carbon fiber carriers subjected to sensibilization into the solution, and reacting in an oil bath at 45 DEG C; and after no bubble is generated, filtering, washing and drying. According to the catalyst and the preparation method, the flexible carbon fiber with a macroscopic three-dimensional net structure is taken as a carrier, the flexible and bendable catalyst can be prepared, meanwhile, the catalyst can be instantly separated from the sodium borohydride solution conveniently due to the macroscopic three-dimensional structure, and the emergency stop control of hydrogen generation by hydrolysis of sodium borohydride can be realized.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a flexible supported carbon fiber supported CoB catalyst and a preparation method thereof. Background technique [0002] According to a survey by the World Energy Organization, mineral energy including coal, oil, and natural gas will be exhausted in the next 100 to 200 years. Problems force scientists all over the world to transfer their research centers to the field of technologies that can quickly and effectively change the existing energy structure. New energy utilization technologies represented by fuel cells have emerged as the times require, and have been continuously developed and utilized. [0003] A fuel cell (FuelCell) is a power generation device that can directly and efficiently convert the chemical energy present in fuel and oxidant into electrical energy. Hydrogen-oxygen fuel cells, through the electrochemical reaction of hydrogen and oxygen between the two el...

AI Technical Summary

Problems solved by technology

[0008] Traditional catalysts mostly exist in powder form, so they cannot overcome the problem of agglomeration of powder catalysts during use; at the same time, powder catalysts are used to catalyze the hydrolysis of sodium borohydride to produce hydrogen, and it is difficult to separate them from sodium borohydride solution immediately. The problem makes the emergency stop and emergency production of sodium borohydride hydrogen production reaction unsatisfactory; the separation of powdered catalyst and sodium borohydride solution also greatly increases the difficulty of catalyst recovery and reuse, thus seriously hindering the catalyst The cost is reduced; in addition, the current fuel cells all use non-deformable fixed shells, and the volume of the batteries is relatively large

These factors restrict the miniaturization of fuel cell power supply volume, especially the development of portable fuel cell power supply systems, which seriously hinder the commercialization and large-scale use of fuel cells.