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Three-dimensional mesh nano porous palladium-ruthenium electrode material for fuel cell and preparation method thereof

A three-dimensional network, nanoporous technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that limit the practical application of direct formic acid fuel cells, and achieve good catalytic activity, large specific surface area, and high electrochemical activity.

Inactive Publication Date: 2011-04-20
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts have many shortcomings in terms of stability and electroactivity, which greatly limit the practical application of direct formic acid fuel cells (DFAFCs).

Method used

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  • Three-dimensional mesh nano porous palladium-ruthenium electrode material for fuel cell and preparation method thereof
  • Three-dimensional mesh nano porous palladium-ruthenium electrode material for fuel cell and preparation method thereof
  • Three-dimensional mesh nano porous palladium-ruthenium electrode material for fuel cell and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The titanium sheet (5 mm × 10 mm × 1.0 mm) was rinsed with water three times, then heated in 18% hydrochloric acid at 85 °C for 10 min to remove the oxide layer on the titanium sheet, and then ultrasonically cleaned for 10 min, the treated titanium Tablets were placed in a hydrothermal reaction kettle, and 10 mL, 5 mmol L -1 PdCl2, 0.05 mmol EDTA and 1 mL 10% HCHO were placed in an infrared drying oven at 180 °C for 10 h, and after cooling to room temperature, the sample was taken out and dried at 100 °C for 10 min to obtain a three-dimensional network nano-Pd electrode.

[0018] The surface morphology of the prepared electrode was measured by a JSM6380LV scanning electron microscope ( figure 1 a) and energy spectrum analysis ( figure 2 a). The electrochemical test was carried out on atoLABPGSTA30 / FRA, a three-chamber glass electrolytic cell, the working electrode was a three-dimensional network nano-Pd electrode, the counter electrode was a large-area Pt electro...

Embodiment 2

[0021] Rinse the titanium sheet (5 mm×10 mm×1.0 mm) with water three times, and then heat it in 18% hydrochloric acid at 85°C for 10 minutes to remove the oxide layer on the surface of the titanium sheet, and put the treated titanium sheet in the hydrothermal reaction In the kettle, add 10 mL, 5 mmol L -1 PdCl 2 , 0.05 mmol EDTA, RuCl 3 and 1 mL of 10% HCHO, and then placed in an infrared drying oven at 180 °C for 10 h. After cooling to room temperature, the sample was taken out and dried at 100 °C for 10 min to obtain a three-dimensional network nano-PdRu electrode.

[0022] The surface morphology of the prepared electrode was measured by a JSM6380LV scanning electron microscope ( figure 1 b) and energy spectrum analysis ( figure 2 b). The electrochemical test was carried out on atoLABPGSTA30 / FRA, a three-chamber glass electrolytic cell, the working electrode was a three-dimensional network nano-PdRu electrode, the counter electrode was a large-area Pt electrode, an...

Embodiment 3

[0025] Rinse the titanium sheet (5 mm×10 mm×1.0 mm) with water three times, then heat it in 18% hydrochloric acid at 80°C for 10 min to remove the oxide layer on the surface of the titanium sheet, and put the treated titanium sheet in the hydrothermal reaction In the kettle, add 12 mL, 5 mmol L -1 PdCl 2 , 0.06 mmol EDTA, RuCl 3 and 1 mL of 10% HCHO, and then placed in an infrared drying oven at 180 °C for 10 h. After cooling to room temperature, the sample was taken out and dried at 100 °C for 10 min to obtain a three-dimensional network nano-PdRu electrode.

[0026] The surface morphology of the prepared electrode was measured by a JSM6380LV scanning electron microscope ( figure 1 b) and energy spectrum analysis ( figure 2 b). The electrochemical test was carried out on atoLABPGSTA30 / FRA, a three-chamber glass electrolytic cell, the working electrode was a three-dimensional network nano-PdRu electrode, the counter electrode was a large-area Pt electrode, and the re...

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Abstract

The invention relates to a three-dimensional mesh nano porous palladium-ruthenium electrode material for a fuel cell and a preparation method thereof. In the invention, EDTA (Ethylene Diamine Tetraacetic Acid) is used as a complexing agent, HCHO (formaldehyde) is used as a reducing agent, a PdCl2 solution or a PdCl2+RuCl3 solution is reduced into nano catalyst particles by a hydrothermal method in one step, and the catalyst particles are deposited on the surface of a titanium sheet to manufacture a corresponding electrode. The catalyst particles are uniformly spherical, wherein the diameters of the catalyst particles are about 60nm, the catalyst particles are mutually connected and piled to form a porous structure, and the criss-cross three-dimensional mesh structure ensures that the electrode material structure is stable. The specific surface area of the prepared electrode material is large, thus the electrode material has high electrochemical activity on formic acid oxidation. Particularly, due to the addition of Ru, the starting potential of formic acid oxidation is greatly advanced. The electrode material has the advantages of simple preparation method, stable structure and good catalysis activity on the formic acid, thus the electrode material can be directly applied to formic acid fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell technology and new energy materials, and in particular relates to a three-dimensional network nanoporous palladium ruthenium electrode material and a preparation method thereof. Background technique [0002] Fuel cells have the advantages of high efficiency, cleanliness and low noise, and are one of the key development directions in the field of new energy, and are increasingly valued by governments around the world. The direct formic acid fuel cell (DFAFC) which uses liquid formic acid as fuel has the advantages of easy fabrication, simplicity, and convenient use. Moreover, formic acid is non-toxic and non-flammable. It is a fuel cell with important application prospects. Metal palladium is a good catalyst for the electrooxidation of formic acid. Formic acid can be directly oxidized to CO without CO intermediate poisoning. 2 . However, the limited surface area of ​​metal palladium restricts i...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88
CPCY02E60/50
Inventor 易清风牛凤娟
Owner HUNAN UNIV OF SCI & TECH
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