Preparation method of AuCu-FeMoS electrocatalyst for nitrogen reduction

Abstract

The invention discloses a preparation method of an AuCu-FeMoS electrocatalyst for nitrogen reduction. The preparation method comprises the following steps of: dissolving cuprous chloride and a tetrachloroauric acid hydrate in a hexane and oleylamine mixed solution, quickly stirring to form a uniform solution, adding a triisopropyl silane and hexane mixed solution, placing the final mixed solution under the condition of 60 DEG C until the color becomes black red, thereby obtaining a AuCu alloy nanowire catalyst; dissolving a sodium molybdate hydrate and a ferric nitrate hydrate in water, adding L-cysteine and high-purity water into the solution, stirring, and transferring the solution into a reaction kettle for reaction to obtain a FeMoS catalyst. and adding the AuCu alloy nanowire catalyst into the FeMoS catalyst standby liquid, performing uniformly stirring and dispersing, making an obtained solution stand still at room temperature, sucking out the supernatant after the supernatant is clarified, and drying the bottom precipitate in a vacuum drying box to obtain the electrocatalyst for nitrogen reduction. The synthesis method is simple, reaction conditions are mild, and the prepared product is high in catalytic activity.

Description

technical field

[0001] The invention belongs to the technical field of nitrogen reduction catalysts, and in particular relates to a method for preparing an AuCu-FeMoS electrocatalyst for nitrogen reduction. Background technique

[0002] The annual consumption of chemical fertilizers in the world reaches as much as 200 million tons, among which ammonia is an important raw material for synthetic fertilizers. The Haberbosch scheme is the most important way for the ammonia industry in the 20th century, but it requires high temperature and high pressure conditions, resulting in huge energy consumption and environmental pollution. Electrocatalytic nitrogen reduction is a simple and energy-saving new solution, so it is of great significance to synthesize a catalyst that can efficiently and selectively catalyze nitrogen reduction.

[0003] The alloy catalyst has an efficient and stable composition structure. The theoretical calculation and experimental results show that the AuCu al...

Examples

Embodiment

[0019] Prepare 2 mL of a mixed solution of hexane and oleylamine at a volume ratio of 1:1, take 9.88 mg of tetrachloroauric acid hydrate and 1.33 mg of cuprous chloride in the mixed solution, stir rapidly to form a homogeneous solution, and dissolve the mixture in advance at room temperature. The prepared 1.4 mL volume ratio of 2:5 triisopropylsilane and hexane mixed solution was added to the above homogeneous solution, and it was left to stand at 60 °C until the color of the solution turned black and red to obtain the AuCu alloy nanowire catalyst. Depend on figure 1 It can be seen that the AuCu alloy nanowire catalyst prepared in this example has good flexibility, the diameter is as thin as 1.2 nm, and the length is several microns.

[0020] Dissolve 0.125 g of sodium molybdate hydrate and 0.21 g of ferric nitrate hydrate in 20 mL of water, and keep the pH value of the solution at 6.5, then add 0.5 g of L-cysteine ​​and 50 mL of water and stir for 30 minutes to form a uniform...

technical field

[0001] The invention belongs to the technical field of nitrogen reduction catalysts, and in particular relates to a method for preparing an AuCu-FeMoS electrocatalyst for nitrogen reduction. Background technique

[0002] The annual consumption of chemical fertilizers in the world reaches as much as 200 million tons, among which ammonia is an important raw material for synthetic fertilizers. The Haberbosch scheme is the most important way for the ammonia industry in the 20th century, but it requires high temperature and high pressure conditions, resulting in huge energy consumption and environmental pollution. Electrocatalytic nitrogen reduction is a simple and energy-saving new solution, so it is of great significance to synthesize a catalyst that can efficiently and selectively catalyze nitrogen reduction.

[0003] The alloy catalyst has an efficient and stable composition structure. The theoretical calculation and experimental results show that the AuCu al...

Examples

Embodiment

[0019] Prepare 2 mL of a mixed solution of hexane and oleylamine at a volume ratio of 1:1, take 9.88 mg of tetrachloroauric acid hydrate and 1.33 mg of cuprous chloride in the mixed solution, stir rapidly to form a homogeneous solution, and dissolve the mixture in advance at room temperature. The prepared 1.4 mL volume ratio of 2:5 triisopropylsilane and hexane mixed solution was added to the above homogeneous solution, and it was left to stand at 60 °C until the color of the solution turned black and red to obtain the AuCu alloy nanowire catalyst. Depend on figure 1 It can be seen that the AuCu alloy nanowire catalyst prepared in this example has good flexibility, the diameter is as thin as 1.2 nm, and the length is several microns.

[0020] Dissolve 0.125 g of sodium molybdate hydrate and 0.21 g of ferric nitrate hydrate in 20 mL of water, and keep the pH value of the solution at 6.5, then add 0.5 g of L-cysteine ​​and 50 mL of water and stir for 30 minutes to form a uniform...

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