Preparation method of multi-element doped Fe2P/CoS2 tortoise-shell-shaped composite electrode material

Abstract

The invention discloses a preparation method of a multi-element doped Fe2P / CoS2 tortoise-shell-shaped composite electrode material, the electrode material is formed by growing N, O, C and S doped Fe2P / N, O, C and P doped CoS2 composite tortoise-shell-shaped nanosheets on a foam cobalt metal framework in situ by adopting an in-situ one-pot vulcanization / phosphorization method, and the tortoise-shell-shaped nanosheets are formed by splicing and assembling N, O, C and S doped Fe2P / N, O, C and P doped CoS2 quantum dots. The preparation method comprises the following steps: (1) preparing cobalt foam by using a hydrothermal method to form countless tiny heterogeneous interfaces which are tightly combined with the cobalt foam, heating and melting polyethylene glycol 200 (or polyethylene glycol 400), thiourea and 1-hydroxyethylidene-1, 1-diphosphonic acid to form a uniform liquid, adding 0.1-5.0 g of ferric nitrate into the uniform liquid obtained in the step (1), transferring into a high-pressure kettle, putting the cobalt foam into the high-pressure kettle, and keeping the temperature at 160-240 DEG C for 1-16 hours to obtain the composite electrode material. The device is used for hydrogen production through HER, OER and complete water splitting under alkaline conditions, biomass electrooxidation and harmful gas formaldehyde electrooxidation, and electrocatalytic degradation of organic pollutants.

Description

technical field [0001] The invention belongs to the field of electrode materials, and relates to a kind of N, O, C, S doped Fe 2 P / N,O,C,P doped CoS 2 The preparation method of composite tortoise shell electrode material, in particular, relates to a method for in-situ growth of N, O, C, S doped Fe on a foamed cobalt metal skeleton by an in-situ one-pot vulcanization / phosphating method 2 P / N,O,C,P doped CoS 2 Preparation method of composite tortoiseshell-like flower-like nanosheet electrode material; further, these tortoiseshell-like flower-like nanosheets are made of N, O, C, S doped Fe 2 P / N,O,C,P doped CoS 2 Quantum dots are assembled by splicing, forming countless tiny heterogeneous interfaces, which are closely combined with foamed cobalt. Background technique [0002] With the progress of society, the development of sustainable energy has attracted much attention. Electrochemical water splitting for hydrogen production is considered to be one of the most ideal meth...

AI Technical Summary

Problems solved by technology

The present invention aims at preparing Fe in the prior art 2 P / CoS 2 The heterojunction catalyst process is cumbersome and requires multiple steps to complete, and has poor conductivity, limited active edge sites, low activity, and poor interface coupling effects. A multi-element doped Fe 2 P / CoS 2 The preparation method of the tortoise-shaped composite electrode material is characterized in that, in a closed system, an in-situ one-pot vulcanization / phosphating method is used to grow N, O, C, S doped Fe in situ on the foamed cobalt metal framework. 2 P / N,O,C,P doped CoS 2 Composite tortoise-like flower-like nanosheet electrode material, these tortoise-like flower-like nanosheets are made of N, O, C, S doped Fe 2 P / N,O,C,P doped CoS 2 Quantum dots are spliced ​​and assembled to form countless tiny heterogeneous interfaces, which are tightly combined with foamed cobalt, including the following steps:

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