Nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation and application thereof

Abstract

The invention belongs to the technical fields of material sciences and electro-catalytic hydrogen production, and particularly relates to a nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation thereof, wherein the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode can be used in an electrolytic water oxygen evolution reaction in an alkaline medium. An electrode system takes a nickel-iron hydrotalcite structure as a catalytic activity center and takes nickel foam as an electrode material; in the alkaline medium, the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode can efficiently electrolyze water to prepare oxygen, the overall overcurrent polishing of electrolytic water is reduced greatly, and good stability is showed; according to the preparation technology of the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode, a nickel-iron hydrotalcite composite structure is grownon the nickel foam base through an in-situ electrodeposition method; and the resources of required raw materials are wide, the price is low, the technology is mature and stable, operation is easy, convenient and fast, controllability is high, the process does not produce poison, and the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode is suitable for mass production andthe industrial electrolytic water reaction.

Description

technical field [0001] The invention belongs to the technical field of material science and the technical field of electrocatalytic hydrogen production, and specifically relates to a nickel-iron hydrotalcite-based electrocatalytic oxygen evolution electrode capable of efficiently electrolyzing water to produce hydrogen in an alkaline medium and its preparation. Background technique [0002] Hydrogen is an important clean energy, and it is considered as a promising new energy to replace fossil energy, and has been widely concerned all over the world. In recent years, with the continuous development of new power generation technologies and the continuous optimization and upgrading of power grid systems, the advantages of electrolytic water hydrogen production technology have been further amplified, and it has even been widely praised as "the most ideal industrial hydrogen production method". However, in the process of electrocatalytic water splitting, the kinetic hindrance of ...

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Problems solved by technology

However, the synthesis methods of such materials reported at this stage and the methods of electrode preparation have limitations, such as the use of solvothermal method, high temperature tempering method and other synthesis methods, complex process, high energy consumption, and unfriendly environment; in addition, usually Loading the prepared electrocatalyst on the two-dimensional substrate by spin coating, spray coating, drop coating, etc. requires additional binders, and the catalyst is not firmly bonded, poorly contacted, and unevenly dispersed on the electrode surface, resulting in hindered charge transport and easy Problems such as falling off seriously affect the final catalytic activity and life of the electrode

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