Coating type nano-palladium film catalytic electrode and its preparation method

A catalytic electrode and nano-palladium technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of nano-carbon powder loss, easy agglomeration, toxicity, etc., and achieve the effects of improved stability, good repeatability, and strong adaptability

Active Publication Date: 2015-01-28
广东一纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Platinum group metal salts have high toxicity, and the extensive use of chemical reagents such as reducing agents and surfactants will cause great environmental pollution problems and cause many potential hazards to people's health
At the same time, platinum nanoparticles are easy to agglomerate, leading to instability and activity decline in the working process, and amorphous nano-carbon powder is easy to lose in the electrochemical oxidation environment, resulting in the loss of catalysts and precious metals

Method used

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  • Coating type nano-palladium film catalytic electrode and its preparation method
  • Coating type nano-palladium film catalytic electrode and its preparation method
  • Coating type nano-palladium film catalytic electrode and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: a kind of coating type nano-palladium thin film catalytic electrode, catalytic electrode is that diameter is 13 millimeters, the metal cobalt sheet that height is 2 millimeters, described metal cobalt sheet purity is more than 99.5wt.%, in described cobalt sheet The upper surface is coated with palladium metal with a composition of 10at.%, the two are metallurgically bonded, the surface microscopic appearance is sputtered spot shape, and the spot size is 10 microns.

[0032] Concrete preparation method is finished as follows:

[0033] (1) Wire-cut a cobalt rod with a diameter of 13 mm and a purity of 99.5 wt.% into discs with a height of 2 mm, and then at room temperature, use 600, 2000-mesh metallographic sandpaper to grind and polish it until bright, respectively. Sonicate in deionized water and absolute ethanol for 10 minutes, remove to dry.

[0034] (2) if figure 1 As shown, the pretreated cobalt sheet 4 is immersed in a silicone oil bath 5 at a temp...

Embodiment 2

[0039] A coating type nano-palladium thin film catalytic electrode, the catalytic electrode is a metal cobalt sheet with a diameter of 15 mm and a height of 4 mm, the purity of the metal cobalt sheet is 99.95wt.%, and the upper surface of the cobalt sheet is coated with a composition of 80.at.% palladium metal, the two are metallurgically bonded, the surface microscopic appearance is sputtered spots, and the spot size is 100 microns.

[0040] Concrete preparation method is finished as follows:

[0041] (1) Wire-cut a cobalt rod with a diameter of 15 mm and a purity of 99.95 wt.% into discs with a height of 4 mm, and then at room temperature, successively grind and polish with metallographic sandpaper of 600 and 2000 mesh until bright, respectively Sonicate in deionized water and absolute ethanol for 20 minutes, remove to dry.

[0042] (2) Immerse the pretreated cobalt sheet in a silicone oil bath at a temperature of 35°C, place it 1 mm below the liquid surface, lead a wire fr...

Embodiment 3

[0046] A coating type nano-palladium thin film catalytic electrode, the catalytic electrode is a metal cobalt sheet with a diameter of 20 mm and a height of 5 mm, the purity of the metal cobalt sheet is above 99.99wt.%, and the upper surface of the cobalt sheet is coated with Covered with palladium metal with a composition of 70.at.%, the two are metallurgically bonded, and the surface microscopic appearance is sputtered spot-like, and the spot size is 0.1 micron.

[0047] Concrete preparation method is finished as follows:

[0048] (1) Wire-cut a cobalt rod with a diameter of 20 mm and a purity of 99.99 wt.% into discs with a height of 5 mm, and then at room temperature, successively grind and polish with metallographic sandpaper of 600 and 2000 mesh until bright, respectively Sonicate in deionized water and absolute ethanol for 30 minutes, remove to dry.

[0049] (2) Immerse the pretreated cobalt sheet in a silicone oil bath at a temperature of 40°C, place it 2 mm below the...

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Abstract

The invention discloses a coating type nano-palladium film catalytic electrode and its manufacturing method. The catalytic electrode is a metallic cobalt sheet with a diameter of 6-100mm, a height of 1-10mm and purity over 99wt.%. The upper surface of the cobalt sheet is coated with?10-100at.% metal palladium. The catalytic electrode provided in the invention adopts a pure palladium wire or palladium sheet as a source electrode, which is deposited on a cobalt substrate by an electrospark discharge cladding method, thus forming the catalytic electrode with the surface palladium film and the cobalt substrate firmly combined. The catalytic electrode prepared by the method disclosed in the invention has the advantages of good combination of the film and the substrate, high specific surface area, high noble metal utilization rate, good catalytic activity, high anti-poisoning performance, and simple process, thus being suitable for mass production of catalytic electrodes for fuel cells.

Description

technical field [0001] The invention relates to a coated nano-palladium thin film catalytic electrode which can be used for electrocatalytic oxidation of small organic molecules (methanol, ethanol, formic acid, etc.), catalytic hydrogenation and other reactions, and a preparation method thereof, in particular to a cobalt substrate surface coating Nano palladium thin film catalytic electrode covered with low palladium loading and its preparation method. Background technique [0002] Fuel cell is a new type of clean energy, which can directly and efficiently convert the chemical energy of hydrogen, methanol, ethanol, formic acid and other fuels into electrical energy, and has the advantages of high fuel utilization rate, high energy density, clean and pollution-free. The catalyst layer is the core working part of the fuel cell. Fuel molecules undergo oxidation-reduction reactions on the active sites on the catalyst surface, and then generate electrons to be transported in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/92H01M4/88
CPCY02E60/50
Inventor 王孝广朱复春林乃明黄晓波唐宾
Owner 广东一纳科技有限公司
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