Preparation method of multi-element doped Fe2P/CoS2 tortoise-shell-shaped composite electrode material
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A technology of composite electrodes and electrode materials, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of limited active edge sites, cumbersome process of heterojunction catalysts, poor conductivity, etc., to improve catalytic activity and stability. , The effect of improving long-term working stability and improving interface charge transfer
Pending Publication Date: 2022-07-29
QINGDAO UNIV OF SCI & TECH
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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/p
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[0016] Example 1:
[0017] (1) 10ml polyethylene glycol 200, 0.3g thiourea, and 0.2g hydroxyethylidene diphosphoric acid were heated and melted at 60°C to form a uniform liquid;
[0018] (2) 0.6g of ferric nitrate was added to the uniform liquid obtained in step (1), transferred to an autoclave, put in 1 piece of 1*1 cobalt foam, kept at 180°C for 8h, cooled, taken out, and deionized in turn N, O, S doped Fe was obtained by washing with water and absolute ethanol 2 P / N,O,P doped CoS 2 Composite electrode materials.
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[0019] Embodiment 2:
[0020] (1) 10ml polyethylene glycol 200, 0.6g thiourea, and 0.2g hydroxyethylidene diphosphoric acid were heated and melted at 60°C to form a uniform liquid;
[0021] (2) 1.2g of ferric nitrate was added to the uniform liquid obtained in step (1), transferred to an autoclave, put in 1 piece of 1*1 cobalt foam, kept at 180°C for 8h, cooled, taken out, and deionized in turn N, O, S doped Fe was obtained by washing with water and absolute ethanol 2 P / N,O,P doped CoS 2 Composite electrode materials.
Example Embodiment
[0022] Embodiment three:
[0023] (1) 10ml of polyethylene glycol 200, 0.3g of thiourea, and 0.4g of hydroxyethylidene diphosphoric acid were heated and melted at 60°C to form a uniform liquid;
[0024] (2) 0.6g of ferric nitrate was added to the uniform liquid obtained in step (1), transferred to an autoclave, put in 2 pieces of 1*1 cobalt foam, kept at 180°C for 8h, cooled, taken out, and deionized in turn N,O,C,S doped Fe was obtained by washing with water and absolute ethanol 2 P / N,O,C,P doped CoS 2 Composite electrode materials.
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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...
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