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Porous catalyst used for photo-electrolysis water oxygen evolution reaction and preparation method of porous catalyst

A porous catalyst, photoelectrolysis technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrolysis processes, etc., can solve problems such as long-term stable use, metal electrodes are easily corroded, equipment damage, etc. Practical value and pioneering, content-rich, efficiency-enhancing effects

Inactive Publication Date: 2013-04-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cost of this method is high, and the metal electrode is very easy to be corroded, and cannot be used stably for a long time. The damage to the equipment due to strong alkalinity is very serious, and higher requirements are put forward for maintenance.

Method used

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  • Porous catalyst used for photo-electrolysis water oxygen evolution reaction and preparation method of porous catalyst
  • Porous catalyst used for photo-electrolysis water oxygen evolution reaction and preparation method of porous catalyst

Examples

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Effect test

Embodiment 1

[0025] This example presents a porous catalyst for photoelectrolysis of water oxygen evolution reaction, which has amorphous characteristics and its chemical formula is KCoPO 4 , with several crystal water molecules.

[0026] Preparation method: Prepare 50mL of cobalt nitrate solution with a concentration of about 0.1mol / L, and add 5mL of commercially available 25%-28% ammonia water at a drop rate of 10mL·s -1 Add dropwise evenly, and after the suspension is continuously stirred for 10 minutes, the -1 Add 25 mL of 0.2 mol / L potassium dihydrogen phosphate solution, and continue stirring for 10 min. The blue-green precipitated product was washed by centrifugation with deionized water and alcohol in sequence until the supernatant was clear, and then dried and ground in a thermostat at 70°C. A porous catalyst for the oxygen evolution reaction of photoelectrolyzed water is obtained.

[0027] 10mg of oxygen evolution catalyst and commercially available 1mL 5wt% Nafion solution we...

Embodiment 2

[0029] This example presents a porous catalyst for photoelectrolysis of water oxygen evolution reaction, which has amorphous characteristics and its chemical formula is KCoPO 4 , with several crystal water molecules.

[0030] Prepare 50mL of cobalt nitrate solution with a concentration of about 0.8mol / L, add 5mL of commercially available 25%-28% ammonia water at a drop rate of 10mL·s-1 Add dropwise evenly, and after the suspension is continuously stirred for 10 minutes, the -1 Add 25 mL of 0.2 mol / L potassium dihydrogen phosphate solution and continue stirring for 10 min. The blue-green precipitated product was washed by centrifugation with deionized water and alcohol in sequence until the supernatant was clear, and then dried and ground in a thermostat at 70°C. 10mg of oxygen evolution catalyst and commercially available 5wt% Nafion solution were sonicated for 30 minutes, evenly dropped on the FTO glass, dried in an oven at 70 degrees, and annealed at 120 degrees for 30 minu...

Embodiment 3

[0032] This example presents a porous catalyst for photoelectrolysis of water oxygen evolution reaction, which has amorphous characteristics and its chemical formula is KCoPO 4 , with several crystal water molecules.

[0033] Prepare 50mL of cobalt nitrate solution with a concentration of about 0.1mol / L, add 15mL of commercially available 25%-28% ammonia water at a drop rate of 10mL·s -1 Add dropwise evenly, and after the suspension is continuously stirred for 10 minutes, the -1 Add 25 mL of 0.2 mol / L potassium dihydrogen phosphate solution, and continue stirring for 20 min. The blue-green precipitated product was washed by centrifugation with deionized water and alcohol in sequence until the supernatant was clear, and then dried and ground in a thermostat at 70°C. 10mg of oxygen evolution catalyst and commercially available 5wt% Nafion solution were sonicated for 30 minutes, evenly dropped on the FTO glass, dried in an oven at 70 degrees, and annealed at 120 degrees for 30 ...

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Abstract

The invention discloses a porous catalyst used for photo-electrolysis water oxygen evolution reaction, which belongs to the technical field of oxygen evolution photo-electrolysis porous catalysts, and also provides a preparation method of the porous catalyst. The porous catalyst used for photo-electrolysis water oxygen evolution reaction has amorphous or crystallization characteristic, has the chemical formula of K(CoxNi[1-x])PO4, wherein x is equal to 0-1, and the structure of the porous catalyst has a plurality of crystal water molecules. The porous catalyst is prepared by using a two-stage precipitation method. The porous catalyst and the preparation method have the following advantages that the oxygen evolution reaction electrode catalysts and the composite electrodes with excellent performance are prepared by cheap raw materials and simple steps, thus the expensive Ir and Ru series compounds are not required.

Description

technical field [0001] The invention belongs to the technical field of oxygen evolution photoelectrocatalytic porous catalysts, and in particular relates to a porous catalyst capable of low overpotential under neutral and alkaline conditions for photoelectrolysis water oxygen evolution reaction and a preparation method thereof. Background technique [0002] Today, when fossil energy is increasingly scarce, people are always looking for a safe, stable, long-term use, and cheap new energy. While actively developing clean energy, the ensuing energy storage problem needs to be solved urgently. Among many storage methods, hydrogen energy storage has obvious advantages such as large reserves, long storage time, and good mobility. Therefore, using photoelectric water splitting to release hydrogen and oxygen has become a very feasible solution to solar energy storage. The efficient and cheap production of hydrogen can make it have real use value. [0003] One of the most importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/10C25B11/06C25B1/04
CPCY02E60/366Y02E60/36
Inventor 张烨林红李建保
Owner TSINGHUA UNIV
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