One-step preparation method and application of supported platinum-based multi-metal catalysts
A multi-metal catalyst, supported technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of uniform dispersion of metal particles and preparation process Complicated and complicated issues, to achieve the effect of being suitable for large-scale production, environment-friendly, and time-consuming
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[0047] Example 1: Pt 3 Pd 1 / XC-72R (40wt%)
[0048] The Vulcan XC-72R carbon powder (60 mg) was ultrasonically dispersed in 60 mL of aqueous solution, and 10 mL of ascorbic acid aqueous solution (150 mM) and 10 mL of polyoxyethylene lauryl ether aqueous solution (1 mM) were added under stirring; after stirring at room temperature for 10 min, add to the above reaction system Add 11.6mL K 2 PdCl 4 and K 2 PtCl 4 mixed aqueous solution, where K 2 PdCl 4 and K 2 PtCl 4 The concentrations in this mixed solution were 5 mM and 15 mM, respectively. After 1 hour of reaction, use 2L of deionized water for several times of suction filtration and washing, and then place it in a vacuum oven to dry at 60°C for 10 hours to obtain Pt. 3 Pd 1 / XC-72R (40wt%) catalyst. figure 1 is the obtained Pt 3 Pd 1 Transmission electron microscope (TEM) image of / XC-72R (40wt%) catalyst. Depend on figure 1 It can be seen that the Pt-Pd bimetallic nanocatalyst grows on the surface of the su...
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[0049] Example 2: Pt 1 Pd 1 / XC-72R (40wt%)
[0050] The Vulcan XC-72R carbon powder (60 mg) was ultrasonically dispersed in 60 mL of aqueous solution, and 10 mL of ascorbic acid aqueous solution (150 mM) and 10 mL of polyoxyethylene lauryl ether aqueous solution (1 mM) were added under stirring; Add 13.2mL of K 2 PdCl 4 and K 2 PtCl 4 mixed aqueous solution, where K 2 PdCl 4 and K 2 PtCl 4 The concentrations in this mixed solution were 10 mM and 10 mM, respectively. After 1 hour of reaction, use 2L of deionized water for several times of suction filtration and washing, and then place it in a vacuum oven to dry at 60°C for 10 hours to obtain Pt. 1 Pd 1 / XC-72R (40wt%) catalyst. Figure 4 is the obtained Pt 1 Pd 1 Transmission electron microscope (TEM) image of / XC-72R (40wt%) catalyst. Depend on Figure 4 It can be seen that the Pt-Pd bimetallic nanocatalysts grow in situ on the surface of the support without obvious particle aggregation and scattering.
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[0051] Example 3: Pt 9 Pd 1 / XC-72R (40wt%)
[0052] The Vulcan XC-72R carbon powder (60 mg) was ultrasonically dispersed in 60 mL of aqueous solution, and 10 mL of ascorbic acid aqueous solution (150 mM) and 10 mL of polyoxyethylene lauryl ether aqueous solution (1 mM) were added under stirring; Add 10.64mL of K 2 PdCl 4 and K 2 PtCl 4 mixed aqueous solution, where K 2 PdCl 4 and K 2 PtCl 4 The concentrations in this mixed solution were 2 mM and 18 mM, respectively. After 1 hour of reaction, use 2L of deionized water for several times of suction filtration and washing, and then place it in a vacuum oven to dry at 60°C for 10 hours to obtain Pt. 9 Pd 1 / XC-72R (40wt%) catalyst. Figure 5 is the obtained Pt 9 Pd 1 Transmission electron microscope (TEM) image of / XC-72R (40wt%) catalyst. Depend on Figure 5 It can be seen that the Pt-Pd bimetallic nanocatalysts grow in situ on the surface of the support without obvious particle aggregation and scattering.
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