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Preparation method for platinum-nickel alloy nanoclusters and fuel cell using the same

A platinum-nickel alloy and nano-cluster technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems that are not conducive to the large-scale promotion of fuel cells, the catalytic activity of catalysts is not ideal, and the stability is not high, so as to avoid pollution and Effects of energy consumption, improvement of electronic structure of Pt metal surface, and reduction of preparation cost

Active Publication Date: 2017-04-19
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic activity of the fuel cell catalyst applied for in this patent is not ideal, and the stability is not high, which is not conducive to the large-scale promotion of fuel cells in the future

Method used

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  • Preparation method for platinum-nickel alloy nanoclusters and fuel cell using the same
  • Preparation method for platinum-nickel alloy nanoclusters and fuel cell using the same
  • Preparation method for platinum-nickel alloy nanoclusters and fuel cell using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the molar ratio of platinum to nickel element 2:1, weigh 0.4006g of PVP (K-30) and 19.80mg of nickel chloride hexahydrate into a 100mL three-necked flask, add 60mL of ethylene glycol, heat to 80°C, and stir 30min.

[0047] Cool down to about 5°C, add 8.33mL of chloroplatinic acid hexahydrate solution, adjust the pH to 9 with NaOH (1mol / l), heat to 198°C, keep stirring and condense and reflux for 3h to obtain platinum-nickel alloy nanoclusters ( Pt 67 Ni 33 NCs) catalyst.

[0048] Catalytic performance test:

[0049] The electrochemical test and characterization was carried out in a test cell with a three-electrode system on a CHI 750E electrochemical workstation produced by Shanghai Chenhua Company. Among them, the platinum wire is the counter electrode, the Ag / AgCl electrode is the reference electrode, and the glassy carbon electrode loaded with the catalyst is the working electrode. Weigh 2 mg of the catalyst into 1.0 mL of ethanol solution, add 10 μ...

Embodiment 2

[0057] According to the molar ratio of platinum to nickel element 1:0, weigh 0.4006g of PVP (K-30) into a 100mL three-neck flask, add 60mL of ethylene glycol, heat to 80°C, and stir for 30min.

[0058] Cool down to about 2°C, add 8.33mL of chloroplatinic acid hexahydrate solution, adjust the pH to 10 with NaOH (1mol / l), heat to 180°C, keep stirring and reflux for 3h to obtain (Pt 100 NCs) catalyst.

Embodiment 3

[0060] According to the molar ratio of platinum to nickel element 3:1, weigh 0.4006g of PVP (K-30) and 14.86mg of nickel chloride hexahydrate in a 100mL three-necked flask, add 60mL of ethylene glycol, heat to 80°C, stir 30min.

[0061] Cool down to about 3°C, add 9.37mL chloroplatinic acid hexahydrate solution, adjust the pH to 11 with NaOH (1mol / l), heat to 200°C, keep stirring and condense and reflux for 3h to obtain platinum-nickel alloy nanoclusters ( Pt 75 Ni 25 NCs) catalyst.

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Abstract

The invention discloses a preparation method for platinum-nickel alloy nanoclusters and a fuel cell using the same. The method comprises the steps of preparing nickel chloride hexahydrate and chloroplatinic acid with the molar ratio of platinum to nickel to be 0.2-5:1; preparing polyvinylpyrrolidone with the total molar ratio of polyvinylpyrrolidone to platinum and nickel to be 1:20-30; adding the prepared polyvinylpyrrolidone and the prepared nickel chloride hexahydrate into a heating device, and adding a solvent, wherein the mass ratio of the solvent to the polyvinylpyrrolidone is 100-200:1; heating to 75-90 DEG C, stirring while heating for 20-40 minutes; cooling the temperature of the heating device to be 0-5 DEG C, adding the prepared chloroplatinic acid into the heating device, adding the sodium hydroxide solution into the heating device to adjust the pH value to be 9-11, heating to 185-105 DEG C, stirring while heating for 1-5 hours, condensing and refluxing to obtain platinum-nickel alloy nanoclusters.

Description

technical field [0001] The invention relates to a fuel cell cathode catalyst, in particular to the preparation of an alloy nanomaterial catalyst and its application in fuel cell cathode materials. Background technique [0002] At present, due to the depletion of fossil fuels, the energy crisis is becoming more and more serious, and the environmental deterioration is intensifying. Green and renewable energy have become the goals that various countries are striving to pursue. In order to take full advantage of renewable energy, cheap and stable electrical energy storage systems will be the key. Fuel cells have the advantages of high energy conversion efficiency, clean and pollution-free, low operating temperature, fast start-up, high specific power, simple structure, and convenient operation. They are recognized as the preferred energy source for electric vehicles and stationary power stations, and can be applied to large Power plants, small functional equipment, vehicles, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92
CPCH01M4/9008H01M4/921Y02E60/50
Inventor 赵灵智张亚丽
Owner SOUTH CHINA NORMAL UNIVERSITY
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