A kind of preparation method of porous cobalt phosphide nanowire catalyst

A technology of cobalt nanowires and catalysts is applied in the field of preparation of porous cobalt phosphide (CoP) nanowire catalysts, which can solve the problems of high cost, scarcity of resources, hindering large-scale production, etc. Effects of chemical activity and stability

Inactive Publication Date: 2019-03-26
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, precious metal platinum (Pt) and ruthenium, iridium oxides (such as RuO 2 and IrO 2 ) is considered to be the most active catalyst for HER and OER, but due to its scarcity of resources, high cost and other shortcomings greatly hinder large-scale production

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  • A kind of preparation method of porous cobalt phosphide nanowire catalyst
  • A kind of preparation method of porous cobalt phosphide nanowire catalyst
  • A kind of preparation method of porous cobalt phosphide nanowire catalyst

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Embodiment 1

[0016] 1. Synthesis of linear basic cobalt carbonate;

[0017] Accurately weigh 0.2g of urea and 1.124g of cobalt sulfate heptahydrate with an electronic balance, add them into a beaker containing 33ml of deionized water, stir until the solids are completely dissolved, add 7ml of glycerol, and stir at room temperature for 30min to form a solution. The resulting solution was transferred to a polytetrafluoroethylene autoclave, heated and reacted at 170°C for 24 hours to obtain a precipitate, which was filtered and washed with deionized and absolute ethanol to remove the soluble matter. Dry at 60°C, take out the product and grind to obtain linear basic cobalt carbonate.

[0018] 2. Synthesis of tricobalt tetroxide precursor;

[0019] The sample obtained above was placed in a tube furnace, heated to 400°C and calcined for 2 hours at a heating rate of 2°C / min in an air atmosphere, cooled to room temperature, and the product was taken out to obtain a tricobalt tetroxide precursor...

Embodiment 2

[0023] 1. Synthesis of linear basic cobalt carbonate;

[0024] Accurately weigh 0.2g of urea and 1.124g of cobalt sulfate heptahydrate with an electronic balance, add them into a beaker containing 33ml of deionized water, stir until the solids are completely dissolved, add 7ml of glycerol, and stir at room temperature for 30min to form a solution. The resulting solution was transferred to a polytetrafluoroethylene autoclave, heated and reacted at 170°C for 24 hours to obtain a precipitate, which was filtered and washed with deionized and absolute ethanol to remove the soluble matter. Dry at 60°C, take out the product and grind to obtain linear basic cobalt carbonate.

[0025] 2. Synthesis of tricobalt tetroxide precursor;

[0026] The sample obtained above was placed in a tube furnace, heated to 400°C and calcined for 2 hours at a heating rate of 2°C / min in an air atmosphere, cooled to room temperature, and the product was taken out to obtain a tricobalt tetroxide precursor...

Embodiment 3

[0030] 1. Synthesis of linear basic cobalt carbonate;

[0031] Accurately weigh 0.2g of urea and 1.124g of cobalt sulfate heptahydrate with an electronic balance, add them into a beaker containing 33ml of deionized water, stir until the solids are completely dissolved, add 7ml of glycerol, and stir at room temperature for 30min to form a solution. The resulting solution was transferred to a polytetrafluoroethylene autoclave, heated and reacted at 170°C for 24 hours to obtain a precipitate, which was filtered and washed with deionized and absolute ethanol to remove the soluble matter. Dry at 60°C, take out the product and grind to obtain linear basic cobalt carbonate.

[0032] 2. Synthesis of tricobalt tetroxide precursor;

[0033] The sample obtained above was placed in a tube furnace, heated to 400°C and calcined for 2 hours at a heating rate of 2°C / min in an air atmosphere, cooled to room temperature, and the product was taken out to obtain a tricobalt tetroxide precursor...

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Abstract

The invention discloses a preparation method of a porous cobalt phosphide nanowire catalyst. The method comprises the following steps: using urea as a precipitating agent, cobalt sulfate heptahydrate as a cobalt source, and glycerol and deionized water as solvents to prepare a solution. The solution is added into a high-pressure reaction kettle for hydrothermal reaction, and after sufficient reaction, suction filtration, washing, and vacuum drying are performed to obtain linear basic cobalt carbonate. In a tube furnace, the linear basic cobalt carbonate is air-fired at a certain temperature to obtain tricobalt tetroxide. Using sodium hypophosphite as the phosphorus source, the precursor of tricobalt tetroxide and sodium hypophosphite are placed on both ends of the same porcelain boat in a certain proportion, the phosphorus source is placed in the upstream of the air flow, and placed in a tube furnace under an inert atmosphere for low-temperature calcination to achieve Preparation of Porous Cobalt Phosphide Nanowire Catalysts. The invention has the advantages of simple production process, low cost, can effectively improve the electrochemical activity and stability of the catalyst, and has wide application.

Description

technical field [0001] The invention relates to a preparation method of a porous cobalt phosphide (CoP) nanowire catalyst. Background technique [0002] With the rapid increase of population and the rapid development of social economy, the demand for energy is very tense. However, the resource utilization efficiency of traditional fossil energy is low and a large amount of harmful gases are produced during the use process. Therefore, the development and utilization of new clean energy is indispensable, and the second Hydrogen energy, a secondary energy source, is considered to be one of the most promising energy sources in the 21st century and has attracted much attention. [0003] Electrolysis of water plays a key role in hydrogen energy. The earliest phenomenon of electrolysis of water began in 1789 with the transient discharge experiments of Van Trostwijk and Deiman, followed by further research and observation by Volta. Finally, in 1800, Nicholosn and Carlisle studied a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B11/03B82Y40/00
CPCB82Y40/00C25B11/03C25B11/04
Inventor 温珍海章梦甜次素琴
Owner NANCHANG HANGKONG UNIVERSITY
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