Self-supporting doped metal hydroxide nanosheet electrode material, and preparation method and application thereof

Abstract

The invention discloses a self-supporting doped metal hydroxide nanosheet electrode material. The material includes: a conductive matrix; and an active material layer, wherein the active material layer is a self-supporting doped metal hydroxide nanosheet, is anchored to the surface of the conductive matrix, and supports and outwardly extends at a certain cross angle. The invention also discloses apreparation method of the self-supporting doped metal hydroxide nano-sheet electrode material, and an application of the material in industrial water electrolysis, for producing hydrogen and oxygen,under a large current density. The self-supporting ultrathin doped metal hydroxide nanosheet electrode material of the present invention can realize the electrolytic water current density activity of500 mA / cm<2> or more and a good cycle stability when used in electric water activity.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a self-supporting doped metal hydroxide nanosheet electrode material, a preparation method and an application thereof. Background technique [0002] With the gradual depletion of fossil energy and the aggravation of environmental pollution, the development of clean energy represented by hydrogen energy has attracted more and more attention. The system for converting solar energy, water energy, geothermal energy, wind energy, nuclear energy, etc. The ideal way of energy utilization system. However, the current commercial catalysts for electrolyzing water use noble metal catalysts such as iridium oxide, ruthenium oxide, and platinum, which are expensive, and the coated noble metal oxide layer will fall off and become inactivated after long-term use. The development of cheap and efficient non-precious metal catalysts for electrocatalytic water splitt...

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Problems solved by technology

The patent with the publication number CN108707923A reports a kind of urea and graphene as the morphology regulator and conductive additive, and the hydrothermal growth of nickel hydroxide on the surface of nickel foam, and then ion exchange to obtain self-supporting nickel-iron hydroxide / reduction oxidation A method of graphene composite electrochemical oxygen evolution catalyst, but its preparation method has a long process flow and is difficult to produce on a large scale

The patent with publication number CN108855102A reports a one-step hydrothermal method to prepare two-dimensional layered Co-doped Zn(OH) 2 The method of nanosheets, but the preparation method is harsh, the doping amount is difficult to control, and it cannot be prepared on a large scale

The patent with the publication number CN105154950A reports a process for preparing layered metal composite hydroxide structural composite materials by electrodeposition, but the layered composite hydroxide prepared by it is micron-scale, with large particles and multi-layer growth are overlapped with each other, the area of ​​the active material layer is small, and the electrolyte requirements are high, and mass production is difficult

[0004] Therefore, the large-area preparation of highly active self-supporting ultra-thin doped metal hydroxide electrode materials is still under research.

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