Multi-stage structure electrode for electrolyzing water, and preparation method of multi-stage structure electrode

Abstract

The invention discloses a multi-stage structure electrode for electrolyzing water, and a preparation method of the multi-stage structure electrode. The preparation method comprises the following steps: carrying out electrochemical etching to obtain a primary-structure rough nickel net, depositing iron-based bimetal and alloy thereof on the surface of the rough nickel net according to different application purposes, and carrying out electrochemical oxidation in an alkaline electrolyte to form an iron-based bimetallic oxyhydroxide on the surface to obtain a tertiary structure. According to the method, the roughness of the surface of the nickel net is increased, anchoring sites are increased, and through the synergistic effect between the multi-stage structures, efficient catalytic activity is achieved while lasting durability is kept, and the performance is better than that of a loaded single-stage structure or a loaded double-stage structure; when the decomposition voltage reaches 2.0 V, the maximum current density can reach 10000 A / m<2> or above; the stability test after activation is that the performance remains basically unchanged after continuous hydrogen production for more than 100 hours at the current density of 6000 A / m<2>, and the electrode material prepared by the method shows excellent catalytic activity and stability, and is very suitable for industrial application of an electrolytic bath for electrolyzing water.

Description

technical field

[0001] The invention relates to the technical field of materials, in particular to a multi-level structure electrode for electrolyzing water and a preparation method thereof. The electrode material improved by the method can be stably applied to the electrolyzed water industry under high current density. Background technique

[0002] Due to the non-renewable nature of fossil fuels, people's growing concerns about energy and environmental issues have prompted people to seek green and renewable energy sources to replace fossil fuels. As a clean and renewable energy source, hydrogen shows great potential. The commonly used electrolysis of water hydrogen production process has been limited by the cost of electrolysis and has been developing slowly. Finding efficient electrocatalysts to accelerate the reaction of electrolysis of water is an effective way to solve the above technical problems. Ideal catalysts usually have lower activation energy barriers and can d...

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