Carbon-loaded Co core-Pt shell nanoparticle catalyst as well as preparation method thereof
A nanoparticle and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc., can solve the problems of low catalytic performance and high cost, and achieve high electrocatalytic activity for oxygen reduction and good long-term stability Effect
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Embodiment 1
[0039] Preparation of carbon-supported Co nanoparticles
[0040] Take 22mg of Co(Ac) 2 4H 2 O, dissolved in 20 mL deionized water. Weigh 53 mg potassium sodium tartrate and dissolve it in 5 mL deionized water. The above two solutions were mixed and stirred for 6h to obtain solution s-1. Take 90.6mg of carbon carrier (XC-72R), ultrasonically disperse it in 100mL deionized water in advance, then mix it with solution s-1, stir evenly, overnight. Then the oil bath of the above dispersion was heated to 60°C, 10mL of hydrazine hydrate (mass fraction 40%) (density 1.03g / mL, m=4.12g) was added dropwise, then the temperature was raised to 85°C, and the reaction was kept for 10h. Cool down, filter with suction, wash with water, and disperse the obtained product (marked as Co / C) in 20 mL of chloroform (density 1.5 g / mL, m=30 g).
[0041] figure 1 This is the XRD pattern of the synthesized carbon-supported Co nanoparticles (Co / C). It can be seen from the figure that, compared with t...
Embodiment 2
[0053] Preparation of carbon-supported Co nanoparticles
[0054] Take 22mg of Co(Ac) 2 4H 2 O, dissolved in 20 mL deionized water. Weigh 88 mg potassium sodium tartrate and dissolve it in 8 mL deionized water. The above two solutions were mixed and stirred for 7h to obtain solution s-1. Take 264mg of carbon carrier (multi-walled carbon nanotubes), ultrasonically disperse in 100mL deionized water in advance, then mix with solution s-1, stir evenly, overnight. Then the oil bath of the above dispersion liquid was heated to 70°C, 88 mg of sodium borohydride was added, and then the temperature was raised to 95°C, and the reaction was kept for 2.5 hours. Cool down, filter with suction, wash with water, and disperse the obtained product (marked as Co / C) in 30 g of chloroform.
[0055] Preparation of Carbon-Supported Co Core-Pt Shell Nanoparticles
[0056] Add 1.05 g of 1-(3-aminophenyl)-3-methyl-2-imidazolidinone to the chloroform dispersion containing 190 mg Co / C, sonicate for...
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