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Preparation method of monatomic platinum composite electrocatalytic hydrogen evolution material

An electrocatalytic and atomic technology, applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve problems such as platinum agglomeration and hinder the stability of SACs, achieve the effect of reducing the dosage, increasing the active specific surface area, and ensuring stability

Active Publication Date: 2021-09-24
SHANGHAI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the immobilization of single atoms requires a strong metal-support interaction, so a reasonable support selection is very important. Although some progress has been made in the field of single atoms, the harsh preparation conditions and excessive precursors of single atoms (SACs) will lead to the agglomeration of platinum and hinder the stability of SACs, so the rational design of single-atom hydrogen evolution electrocatalysts is also very necessary

Method used

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  • Preparation method of monatomic platinum composite electrocatalytic hydrogen evolution material
  • Preparation method of monatomic platinum composite electrocatalytic hydrogen evolution material
  • Preparation method of monatomic platinum composite electrocatalytic hydrogen evolution material

Examples

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Embodiment 1

[0053] In this example, a method for preparing single-atom platinum composite electrocatalytic hydrogen evolution materials by controllable dissolution of platinum electrodes is mainly introduced. The process flow is as follows: figure 1 As shown, the specific operation steps are as follows:

[0054] Step 1, preparation of choline chloride / ethylene glycol deep eutectic solvent: use choline chloride and ethylene glycol as raw materials, mix them in a beaker at a molar ratio of 1:2, and stir at 40°C for 12 hours until Form a homogeneous colorless transparent liquid, such as figure 2 Solution A shown in;

[0055] Step 2, preparation of electrolyte solution: 0.2M (2.38g) of nickel chloride hexahydrate (analytical pure) and 0.1M (1.19g) of cobalt chloride hexahydrate (analytical pure) were added to the 50mL prepared in step 1 In the deep eutectic solvent, stir at 40°C for 2 hours to obtain a uniform dark green transparent liquid, such as figure 2 Solution B shown in ; add 0.3g...

Embodiment 2

[0063] In this example, a method for preparing single-atom platinum composite electrocatalytic hydrogen evolution materials by controllable dissolution of platinum electrodes is mainly introduced. The process flow is as follows: figure 1 As shown, the operation steps are roughly the same as in Embodiment 1:

[0064] Step 1, with embodiment one;

[0065] Step 2, preparation of electrolyte solution: 0.2M (2.38g) of nickel chloride hexahydrate (analytical pure) and 0.1M (1.19g) of cobalt chloride hexahydrate (analytical pure) were added to the 50mL prepared in step 1 In the deep eutectic solvent, stir at 40°C for 2 hours to obtain a uniform dark green transparent liquid, such as figure 2 Solution B shown in ; Add 0.2g of single-layer graphene particles (GO) to the prepared solution, after ultrasonication for 1h, stir at 40°C for 2h, and finally obtain a suspended black liquid such as figure 2 Electrolyte C shown in;

[0066] Step 3, with embodiment one;

[0067] Step 4. Syn...

Embodiment 3

[0073] In this example, a method for preparing single-atom platinum composite electrocatalytic hydrogen evolution materials by controllable dissolution of platinum electrodes is mainly introduced. The process flow is as follows: figure 1 As shown, the operation steps are roughly the same as in Embodiment 1:

[0074] Step 1, with embodiment one;

[0075] Step 2, preparation of electrolyte solution: 0.2M (2.38g) of nickel chloride hexahydrate (analytical pure) and 0.1M (1.19g) of cobalt chloride hexahydrate (analytical pure) were added to the 50mL prepared in step 1 In the deep eutectic solvent, stir at 40°C for 2 hours to obtain a uniform dark green transparent liquid, such as figure 2 Solution B shown in ; Add 0.4g of single-layer graphene particles (GO) to the prepared solution, after ultrasonication for 1h, stir at 40°C for 2h, and finally obtain a suspended black liquid such as figure 2 Electrolyte C shown in;

[0076] Step 3, with embodiment one;

[0077] Step 4, the...

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Abstract

The invention discloses a preparation method of a monatomic platinum composite electrocatalytic hydrogen evolution material. The method comprises the steps of: adopting Nickel chloride, cobalt chloride and single-layer graphene oxide (GO) as raw materials; using a deep eutectic solvent prepared from choline chloride / ethylene glycol as an electrolyte; adding GO into the eutectic solvent, and stirring at a constant temperature to form an electrolyte containing dispersed GO solid particles; adopting a nickel sheet as a counter electrode, adopting carbon cloth as a working electrode, and adopting a non-aqueous silver wire electrode as a reference electrode to form a standard three-electrode system for composite electrodeposition; putting the electrode material prepared by composite electrodeposition into a tubular furnace, and introducing argon for calcining; and adopting a platinum sheet as a counter electrode, adopting the treated sample as a working electrode, adopting a non-aqueous silver wire electrode as a reference electrode, adopting a deep eutectic solvent prepared from choline chloride / ethylene glycol as electrolyte, selecting cyclic voltammetry, and controlling different turns to load monatomic platinum. The material has excellent hydrogen evolution performance and can be applied to the field of hydrogen production through water electrolysis.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by electrolysis of water, in particular to a preparation method of a single-atom platinum composite electrocatalytic hydrogen evolution material. Background technique [0002] With the development of society, the gradual exhaustion of fossil fuels and many environmental problems force people to seek new types of clean energy. Among them, hydrogen has become a promising green energy because of its high energy density, low pollution and no greenhouse gas emissions. With the popularization of electric energy, large-scale water splitting can generate high-purity hydrogen, which has attracted extensive attention, and many electrocatalysts for hydrogen evolution reaction (HER) have been developed in recent years. At present, the hydrogen production methods that have been developed mainly include hydrogen production from fossil fuels, hydrogen production from bioenergy, hydrogen production f...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B9/60C25B9/65C25B11/04
CPCC25B1/04C25B9/60C25B9/65C25B11/04Y02P20/133
Inventor 汪淑娟邹星礼卢明辉王府倩李想庞忠亚熊晓璐李光石鲁雄刚周忠福许茜
Owner SHANGHAI UNIV
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