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Electrocatalyst for sunlight-drive water electrolysis oxygen evolution reaction and preparation method of electrocatalyst

A technology for oxygen evolution reaction and electrocatalyst, which is applied in the field of electrocatalyst for sunlight-driven electrolysis of water for oxygen evolution reaction and its preparation field, can solve the problems of high cost, limited application scale, etc., achieves simple production process principle, and improves energy use efficiency , the effect of high current density

Inactive Publication Date: 2017-03-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the best electrocatalysts currently in use are still limited to noble metals and their oxides, such as platinum Pt and ruthenium oxide (RuO 2 )Material
The scarcity and corresponding high cost of these materials greatly limit the scale of their application in industrial production

Method used

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  • Electrocatalyst for sunlight-drive water electrolysis oxygen evolution reaction and preparation method of electrocatalyst
  • Electrocatalyst for sunlight-drive water electrolysis oxygen evolution reaction and preparation method of electrocatalyst
  • Electrocatalyst for sunlight-drive water electrolysis oxygen evolution reaction and preparation method of electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mix 5 grams of melamine into 250 milliliters of milk, stir with an electromagnetic stirrer, and gradually add NH with a mass concentration of 25% 3 ·H 2 O to the mixed solution, monitored with pH test paper until the pH value is close to 10 and presents a weak base state, creating conditions for the hydrolysis reaction of tetraethyl orthosilicate (TEOS);

[0022] (2) Add 15 milliliters of TEOS to the above-mentioned homogeneously mixed solution, and then continue to stir for 1 hour, and TEOS is hydrolyzed to generate silicon dioxide (SiO 2 )structure;

[0023] (3) The prepared milk / SiO 2 The solution is pumped into the heating chamber of the spray dryer, sprayed and dried at 180°C to form a white powder; the powder is collected, placed in a ceramic dish and placed in a high-temperature tube furnace, filled with argon (Ar) for calcination— —Rise 3°C per minute until 800°C, continue calcination at 800°C for 2 hours, the original white powder is carbonized into blac...

Embodiment 2

[0034] Mix 10 g of melamine into 250 ml of milk, stir with an electromagnetic stirrer, and gradually add 10 mL of NH with a mass concentration of 25%. 3 ·H 2 O into the mixed solution to create conditions for the hydrolysis reaction of tetraethyl orthosilicate (TEOS); add 10 milliliters of TEOS to the above-mentioned uniform mixed solution, and continue stirring for 1.5 hours, and TEOS is hydrolyzed to generate silicon dioxide (SiO 2 ) structure; the prepared milk / SiO 2The solution is pumped into the heating chamber of the spray dryer, sprayed and dried at 175°C to form a white powder; the powder is collected, placed in a ceramic dish and placed in a high-temperature tube furnace, filled with argon (Ar) for calcination— —Rise 2°C per minute until 900°C, continue calcination at 900°C for 3 hours, the original white powder is carbonized into black powder, milk and melamine are converted into nitrogen-containing carbon structure by heating, and interlaced with nanoporous silica ...

Embodiment 3

[0036] Add 30 g of soybean powder to 250 ml of deionized water, after fully dissolving, remove insoluble impurities by filtration, then mix in 15 g of melamine, stir with an electromagnetic stirrer, and gradually add NH with a mass concentration of 25%. 3 ·H 2 O to the mixed solution, monitor with pH test paper until the pH value is close to 10, showing a weak base state, and create conditions for the hydrolysis reaction of tetraethyl orthosilicate (TEOS); add 15 ml of TEOS to the above-mentioned uniform mixed solution, and continue to stir for 1 hour , TEOS is hydrolyzed to form silica (SiO 2 ) structure; the prepared milk / SiO 2 The solution is pumped into the heating chamber of the spray dryer, sprayed and dried at 180°C to form a white powder; the powder is collected, placed in a ceramic dish and placed in a high-temperature tube furnace, filled with argon (Ar) for calcination— —Increase 3°C per minute until 800°C, continue calcination at 800°C for 2 hours, the original y...

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Abstract

The invention belongs to the technical field of electrocatalyst and particularly relates to an electrocatalyst for a sunlight-drive water electrolysis oxygen evolution reaction and a preparation method of the electrocatalyst. According to the electrocatalyst, firstly, milk is used as a raw material, and a nitrogen source and a silicon source are added and mixed; then the mixture is subjected to spray drying granulation, calcination and carbonization; and finally metal impurities and silicon are removed through acid pickling and alkaline washing, a multi-channel nanoscale carbon microsphere containing nitrogen is prepared, and the electrocatalyst for the sunlight-drive water electrolysis oxygen evolution reaction is obtained. By the adoption of the electrocatalyst, the overpotential condition of the water electrolysis reaction can be lowered effectively, the energy use efficiency is improved, and meanwhile the manufacturing process is simple in principle and safe to implement.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to an electrocatalyst for oxygen evolution reaction of electrolyzed water driven by sunlight and a preparation method thereof. Background technique [0002] In recent years, the core of research on hydrogen fuel production based on water splitting is to prepare efficient and stable electrocatalysts. However, the best electrocatalysts currently in use are still limited to noble metals and their oxides, such as platinum Pt and ruthenium oxide (RuO 2 )Material. The scarcity and corresponding high cost of these materials greatly limit the scale of their application in industrial production. At present, various abundant materials such as metal oxides, composite metal oxides, hydroxides, sulfides, and selenides have been included in the scope of research and development in order to reduce the OER overpotential. In addition, metal-free carbon-based materials have at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/04C25B1/55C25B11/031Y02E60/36
Inventor 蔡陈仪况敏郑耿锋
Owner FUDAN UNIV
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