Palladium cubic nanocrystals doped with phosphorus element on the surface, preparation method and application thereof
A cubic nanometer and surface doping technology, applied in the field of nanomaterials, can solve the problems of high price, impossibility of large-scale industrial application, limited Pt catalyst, etc., and achieve easy preservation, high-efficiency hydrogen production catalytic performance, and good dispersion Effect
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Embodiment 1
[0020] The preparation method of cubic palladium nanocrystals doped with phosphorus on the surface is as follows:
[0021] (1) Dissolve sodium tetrachloropalladate in 3 mL of water at room temperature, stir magnetically for 60 minutes until uniformly dissolved, and prepare a sodium tetrachloropalladate solution with a concentration of 0.065mol / L;
[0022] (2) Dissolve 105mg of polyvinylpyrrolidone, 40mg of potassium bromide and 60mg of ascorbic acid in 8mL of water and ultrasonically disperse, mix the resulting mixture solution with the sodium tetrachloropalladate solution prepared in step (1), and heat the mixture at 80°C The reaction was carried out under magnetic stirring for 3 hours. After the reaction, the product was centrifuged and washed three times with ethanol, and the obtained precipitate was redispersed in 11 mL of water to obtain a cubic palladium nanocrystal seed solution;
[0023] (3) At room temperature, dissolve polyvinylpyrrolidone with a molecular weight of ...
Embodiment 2
[0029] The preparation method of cubic palladium nanocrystals doped with phosphorus on the surface is as follows:
[0030] (1) At room temperature, dissolve potassium tetrachloropalladate in 3 mL of water, stir magnetically for 60 minutes until uniformly dissolved, and prepare a potassium tetrachloropalladate solution with a concentration of 0.065 mol / L;
[0031] (2) Dissolve 100mg of polyvinylpyrrolidone, 40mg of potassium bromide and 60mg of ascorbic acid in 8mL of water and ultrasonically disperse, mix the obtained mixture solution with the potassium tetrachloropalladate solution prepared in step (1), and heat at 90°C The reaction was carried out under magnetic stirring for 2 hours. After the reaction, the product was centrifuged and washed three times with ethanol, and the obtained precipitate was redispersed in 11 mL of water to obtain a cubic palladium nanocrystal seed solution;
[0032] (3) At room temperature, dissolve polyvinylpyrrolidone with a molecular weight of 50...
Embodiment 3
[0038] The preparation method of cubic palladium nanocrystals doped with phosphorus on the surface is as follows:
[0039] (1) Dissolve sodium tetrachloropalladate in 3 mL of water at room temperature, stir magnetically for 60 minutes until uniformly dissolved, and prepare a sodium tetrachloropalladate solution with a concentration of 0.07mol / L;
[0040] (2) Dissolve 125mg of polyvinylpyrrolidone, 45mg of potassium bromide and 65mg of ascorbic acid in 8mL of water and ultrasonically disperse, mix the resulting mixture solution with the sodium tetrachloropalladate solution prepared in step (1), and heat the mixture at 70°C The reaction was carried out under magnetic stirring for 4 hours. After the reaction, the product was centrifuged and washed three times with ethanol, and the obtained precipitate was redispersed in 11 mL of water to obtain a cubic palladium nanocrystal seed solution;
[0041] (3) At room temperature, dissolve polyvinylpyrrolidone with a molecular weight of 30,...
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