Composite nano gold-platinum material, preparation method thereof and an application of composite nano gold-platinum material in direct methanol fuel cell anode catalyst
A composite material, platinum nanotechnology, applied in fuel cells, battery electrodes, nanotechnology, etc., can solve the problems of difficult to control product particle size and distribution, uneven Pt nanoparticles, unstable current and voltage, etc., to achieve anti-poisoning. The effect of improving ability, improving surface catalytic activity and convenient operation
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[0033] Example 1
[0034] A gold-platinum nanocomposite material, in which the nano-gold is in a dendritic shape, spherical platinum particles are modified on the surface of the nano-gold, the molar ratio of gold to platinum is 16: (4-5), and the size of the nano-gold is 0.1-7 Micron, the size of platinum particles is 1.5-4 nanometers.
[0035] The preparation method of the gold-platinum nanocomposite material includes the following processes:
[0036] (1) Disperse 0.8 mL of chloroauric acid with a concentration of 0.1 mol / L in 7.2 mL of a potassium chloride solution with a concentration of 0.1 mol / L to prepare a fresh yellow solution A, and ultrasonicate the A solution before electrodeposition. Mix well within minutes; Dissolve 1mL of potassium chloroplatinate with a concentration of 0.02mol / L in 18ml of ultrapure water to prepare solution B; Dissolve 0.1mol / L of ascorbic acid in 1ml of ultrapure water to prepare Solution C;
[0037] (2) Use the pretreated glassy carbon electrode a...
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[0040] Example 2
[0041] This embodiment is the same as embodiment 1 except for the following features: insert the obtained nano-gold modified glassy carbon electrode into a solution of potassium chloroplatinate containing ascorbic acid and deposit for 5 minutes.
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[0042] Example 3
[0043] This embodiment is the same as Embodiment 1 except for the following features: the obtained gold-modified glassy carbon electrode is inserted into a solution of potassium chloroplatinate containing ascorbic acid and deposited for 10 minutes.
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