Mo-doped transition metal hydroxide electrocatalyst constructed through deep self-reconstruction as well as preparation method and application of Mo-doped transition metal hydroxide electrocatalyst

Abstract

The invention discloses a Mo-doped transition metal hydroxide electrocatalyst constructed through deep self-reconstruction and a preparation method and application of the Mo-doped transition metal hydroxide electrocatalyst. The method comprises the following steps: activating a MoS2 nanosheet array under an overpotential condition, soaking the MoS2 nanosheet array in a transition metal salt solution for ion adsorption, and performing deep self-reconstruction by a cyclic voltammetry scanning method to obtain the catalyst. According to the method, raw materials are low in price, high-temperature sintering is not needed, energy consumption in the production process is low, and the production cost is low; and according to the method, a transition metal ion adsorption strategy and an electrochemical self-reconstruction strategy are adopted, the preparation process is simple, and the method is suitable for large-scale production. The deep self-reconstruction Mo-doped transition metal hydroxide electrocatalyst provided by the invention has excellent oxygen evolution reaction intrinsic activity, the overpotential under the current density of 10mA / cm<2> is 242mV, and the mass activity current density under the overpotential of 300mV is 1910A / g.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a Mo-doped transition metal hydroxide electrocatalyst constructed by deep self-reconfiguration and its preparation method and application. Background technique [0002] At present, hydrogen, as the energy carrier with the highest energy density, has attracted much attention among many new energy raw materials. Hydrogen energy not only has high energy density, clean and zero pollution, but also has a wide range of sources, which has broad prospects in the field of new energy development. At present, a major source of hydrogen is the cracking of fossil fuels such as petroleum. Its main disadvantages include scarcity and limited raw materials, serious energy consumption in the preparation process, and low purity of the hydrogen produced. The biggest disadvantage is that the hydrogen obtained through fossil fuel cracking still contains impurities such ...

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Problems solved by technology

However, the depth of this surface self-reconstruction layer is limited, only ~10 nm, forming a core-shell structure, which leads to the underutilization of the internal components of the catalyst.

Therefore, it is challenging to directly fabricate catalysts with full active species via deep self-reconstitution

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