Method for preparing high-activity ternary metal boride hydrogen evolution catalyst from waste aluminum foil

Abstract

The invention discloses a method for preparing a high-activity ternary metal boride hydrogen evolution catalyst from waste aluminum foil. The method comprises the following steps: (1) washing cut waste aluminum foils with hydrochloric acid, respectively carrying out ultrasonic treatment with ethylene glycol and acetone, soaking the treated waste aluminum foils in a manganese chloride solution forlater use, and denoting an obtained solution as A; (2) adding a sodium sulfate solution into the A until the pH value of the solution is 4 to obtain B; (3) adding a ferric trichloride solution into the B to obtain C; (4) taking an aluminum foil as a working electrode, a platinum net as an auxiliary electrode and the C as an electrolyte, performing electrifying for efficient electro-deposition, anddropwise adding a sodium borohydride solution into the solution C at the same time; and (5) washing and drying the self-supporting electrodes with absolute ethyl alcohol and deionized water in sequence to obtain the high-activity ternary Al-Fe-Mn boride hydrogen evolution catalyst. The preparation period is short, the hydrogen evolution catalyst can be rapidly prepared, and the catalyst is stablein performance and high in catalytic activity and has regular nano block 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 a hydrogen evolution catalyst applied to electrolysis of water, in particular to a method for preparing a highly active ternary metal hydrogen evolution catalyst by using waste aluminum foil. Background technique [0002] The traditional fossil energy supply mode of energy shortage has become a bottleneck restricting the sustainable development of human society. Finding high-energy, pollution-free and renewable new energy sources is one of the current global research hotspots. Hydrogen energy not only has many characteristics such as abundant resources and high calorific value, but also is not restricted by factors such as seasons and regions compared with renewable energy such as wind energy and solar energy. It is regarded as an alternative energy source with the most development potential in the future. Hydrogen producti...

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Problems solved by technology

[0004] Aluminum foil is an essential material used in lithium-ion batteries. However, with the popularization of new energy electric vehicles and the use of power batteries, the life of lithium-ion batteries continues to decline. After reaching their service life, they have to face the disposal of retired lithium-ion batteries. The problem is that if they are simply disposed of as solid waste, these discarded lithium-ion batteries will not only seriously damage the environment, occupy a large amount of land resources and cause many hidden dangers, but also cause a serious waste of resources (some materials in decommissioned lithium-ion batteries can be Cascade utilization, such as aluminum foil can be recycled and prepared into corresponding catalysts), therefore, it is of great significance to recycle waste aluminum foil

At present, there is no report on the use of waste aluminum foil for recycling and preparing it into an anode hydrogen evolution electrocatalyst with high activity and stability.

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