Noble metal supported nano frame catalyst and preparation method and application thereof

Abstract

The invention provides a noble metal supported nano frame catalyst and a preparation method and application thereof. The catalyst comprises noble metals and transition metal hydroxides, and is of a hollow nano frame structure. According to the noble metal supported nano frame catalyst, the catalyst is of a hollow nano frame structure, so that the activation specific surface area is large, the wallthickness is small, and the substance transmission distance is short; the catalyst supports a nickel cobalt hydroxide with the noble metals, so that the electronic structure between the nickel cobalthydroxide and the noble metals is optimized, the stability of the catalyst is high; the overpotential of catalyzing a hydrogen evolution reaction can be effectively reduced, wherein the overpotentialis only 60 mV when the current density is 10 mA cm-2; and the catalyst is simple in preparation method, short in production cycle, and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a noble metal-supported nano-frame catalyst and its preparation method and application, in particular to a noble metal-supported nickel-cobalt hydroxide nano-frame catalyst and its preparation method and application. Background technique [0002] With the gradual depletion of fossil energy, the development and utilization of renewable energy has been paid more and more attention. Hydrogen, as a renewable clean energy, does not have the problem of carbon dioxide emissions when used as an energy source. At the same time, hydrogen has a high energy density. , is an ideal energy source that can replace fossil energy sources. Electrolysis of water is a commonly used method for hydrogen production. High-purity hydrogen can be obtained under the action of catalysts. Therefore, the preparation of high-efficiency hydrogen evolution reaction catalysts is one of the current research focuses...

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Problems solved by technology

[0004] CN 108003355 A discloses a method for synthesizing a hollow cubic PtCu nanoframe material. By adopting a one-pot co-reduction solvothermal method, the metal precursor platinum acetylacetonate and copper chloride are supplemented with the regulatory molecule hexadecyltrimethyl Ammonium chloride, reducing agent ethanolamine, and solvent oleylamine were used to prepare PtCu nanoframe materials by solvothermal reduction, but this method has strict requirements on the reaction conditions, and the formation of hollow cubes is difficult.

CN 105990588 A discloses a bifunctional Pd / Ni-Mo / C composite catalyst and its preparation method. The catalyst is formed by using conductive carbon as a carrier, loading NiMo alloy on it, and then covering it with precious metal Pd. First, a certain proportion of NiMo is supported on the surface of carbon support by impregnation-high temperature reduction method to obtain NiMo / C, and then a certain proportion of noble metal Pd is selectively partially coated on NiMo / C by ethylene glycol reflux method. The interaction of metals improves the electronic structure of the metal surface, thereby increasing the oxygen reduction activity, but the catalyst preparation process involves many steps, and involves high temperature and other steps, which is easy to cause morphology changes, and the stability still needs to be improved.

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