Method for preparing high-activity ternary metal sulfide oxygen evolution catalyst from waste copper foils

Abstract

The invention discloses a method for preparing a high-activity ternary metal sulfide oxygen evolution catalyst from waste copper foils. The method comprises the following steps: (1) sequentially carrying out ultrasonic treatment on the cut waste copper foils by using 3M hydrochloric acid, ethylene glycol and acetone respectively, and soaking the treated waste copper foils in a manganese chloride solution for later use, denoting as A; (2) adding a sodium sulfate solution into the solution A until the pH value of the solution is 5 to obtain a solution B; (3) adding a ferric trichloride solutioninto B to obtain C; (4) taking a copper foil as a working electrode, a platinum net as an auxiliary electrode and C as an electrolyte, electrifying to carry out electrochemical deposition reaction, and dropwise adding a sodium thiosulfate solution into the solution C; and (5) washing the self-supporting electrode, and drying to obtain the high-activity ternary Cu-Fe-Mn sulfide oxygen evolution catalyst. The method is simple, the process is controllable, the preparation period is short, and the prepared catalyst is stable in performance and high in catalytic activity and has regular nanosheet flower-like morphology.

Description

technical field [0001] The invention belongs to the fields of waste resource utilization and catalytic chemistry, and relates to a preparation method for an oxygen evolution catalyst applied to electrolysis of water, in particular to a method for preparing a highly active ternary metal sulfide oxygen evolution catalyst by using waste copper foil. Background technique [0002] Electrolyzed water hydrogen production technology is considered to be the most suitable and most popular hydrogen production process because of its simple operation, excellent product purity, and mature technology. However, the oxygen evolution half-reaction of water electrolysis is a kinetically slow reaction, which is the main factor limiting the efficiency of water splitting. Therefore, it is also very important to design high-performance oxygen evolution catalysts. In particular, transition metal sulfides can tune catalyst performance through rational design of morphology and design of heterointerf...

AI Technical Summary

Problems solved by technology

However, with the attenuation of the life of lithium-ion batteries and the arrival of the service life, we have to face the problem of decommissioning and disposal of waste lithium-ion batteries. Since these waste lithium-ion batteries contain a large amount of waste copper foil, if we simply follow the solid waste Disposal will not only occupy a large amount of land resources and endanger the environment, but also cause a serious waste of resources. Therefore, if the copper foil in the decommissioned lithium-ion battery is stripped and recycled, and used to prepare a self-supporting Electrodes are very important

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