Dendritic PdPt nanoparticle for electrocatalytic methanol oxidization and preparation method of dendritic PdPt nanoparticle
A methanol oxidation and nanoparticle technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of large particle size of precious metals, difficult process control, and particle shape damage, etc., and achieve easy Preparation, low cost, and the effect of improving catalytic performance
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[0025] Example 1
[0026] 1) Mix the palladium salt (99% palladium chloride powder with a mass fraction of 99% (Pd% is 59%)) and hydrochloric acid (hydrogen chloride) at a molar ratio of 1:2 to obtain a palladium precursor solution with a concentration of 10mM;
[0027] 2) Weigh 0.085g of tannins, drop in 1mL of 10mM palladium precursor aqueous solution, 3mL of 5mM chloroplatinic acid aqueous solution and 26mL of deionized water in order, the drip rate is 8 drops / min, and the total volume is 30mL;
[0028] 3) The mixed solution obtained in step 2) was continuously stirred at room temperature for 15 minutes and then transferred to a stainless steel autoclave, heated at 120°C for 6 hours, furnace cooled to room temperature, and the cooling rate was 3°C / min to obtain a black mixed solution ;
[0029] 4) Centrifuge the mixed solution obtained in step 3) at 18000 rpm for 10 minutes in a centrifuge, and wash with a mixture of deionized water and ethanol to finally obtain dendritic Pd 52 Pt ...
Example Embodiment
[0032] Example 2
[0033] 1) Mix the palladium salt (99% palladium chloride powder with a mass fraction of 99% (Pd% is 59%)) and hydrochloric acid in a molar ratio of 1:2 to obtain a palladium precursor solution with a concentration of 10 mM;
[0034] 2) Weigh 0.102g of tannins, drop in 0.5mL of 10mM palladium precursor solution, 4mL of 5mM chloroplatinic acid solution and 25.5mL of deionized water in order, the drip rate is 5 drops / min, and the total volume is 30mL;
[0035] 3) The mixed solution obtained in step 2) was continuously stirred at room temperature for 12 minutes and then transferred to a stainless steel autoclave, heated at 150°C for 4 hours, and furnace cooled to room temperature at a cooling rate of 5°C / min to obtain a black mixed solution ;
[0036] 4) The mixed solution obtained in step 3) is centrifuged at 15000 rpm for 12 minutes in a centrifuge, and washed with a mixture of deionized water and ethanol to finally obtain dendritic Pd 36 Pt 64 Nano particles.
[0037]...
Example Embodiment
[0038] Example 3
[0039] 1) Mix the palladium salt (99% palladium chloride powder with a mass fraction of 99% (Pd% is 59%)) and hydrochloric acid in a molar ratio of 1:2 to obtain a palladium precursor solution with a concentration of 10 mM;
[0040] 2) Weigh 0.077g of tannins, drop in 1.5mL of 10mM palladium precursor solution, 2mL of 5mM chloroplatinic acid solution and 26.5mL of deionized water in order, the drip rate is 10 drops / min, and the total volume is 30mL;
[0041] 3) The mixed solution obtained in step 2) was continuously stirred at room temperature for 18 minutes and then transferred to a stainless steel autoclave, heated at 100°C for 8 hours, furnace cooled to room temperature, and the cooling rate was 1°C / min to obtain a black mixed solution ;
[0042] 4) Centrifuge the mixed solution obtained in step 3) at 20000 rpm for 8 minutes in a centrifuge, and wash with a mixture of deionized water and ethanol to finally obtain dendritic Pd 69 Pt 31 Nano particles.
[0043] Fig...
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