One-step method for synthesizing conducting polymer modified and carbon supported iron-based composite catalyst
A technology of conductive polymer and synthesis method, applied in the direction of organic compound/hydride/coordination complex catalyst, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve uneven distribution , the process is cumbersome, the catalytic performance is degraded, etc., to achieve the effect of uniform distribution, simple synthesis process and low cost
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Embodiment 1
[0031] Add 10g of spherical graphite BP 2000 to 100ml of water to form a suspension, add glacial acetic acid to adjust the pH to 2, and stir at room temperature for 20 minutes. Then add 2g of pyrrole monomer and stir for 10min, then add 1g of anhydrous FeCl 3 , stirred at room temperature for 1h. After slowly adding 300ml of alkaline sodium borohydride solution, sodium borohydride and anhydrous FeCl 3 The molar mass ratio of the mixture was 1:1, stirred vigorously for 40 minutes, cooled naturally, washed with deionized water and filtered, and dried in vacuum at 90°C for 8 hours. After drying, obtain the spherical graphite-supported iron-based composite catalyst modified by polypyrrole, and its X-ray diffraction spectrum is as follows: figure 1 As shown, its scanning electron micrograph is shown in figure 2 shown. The binding state of the iron-based complex and polypyrrole is as follows image 3 shown. The molar content of N atoms in the catalyst was 0.1%, resulting in a...
Embodiment 2
[0035] The positive electrode was prepared by using the polypyrrole-modified spherical graphite-supported iron-based composite catalyst prepared in Example 1.
[0036] The Zr-Ni composite catalyst prepared by mixing Zr-Ni hydrogen storage alloy powder, Pt / C, and Ni powder in a mass ratio of 7:6:7, water, Nafion solution and absolute ethanol are catalyst in mass ratio: water : Nafion solution: anhydrous ethanol at a ratio of 1:3:7:3 to prepare a slurry, then evenly apply it on the nickel foam, and dry it naturally to prepare a negative electrode.
[0037] With 10wt.% N 2 h 4 , 15wt.% NaOH basic hydrazine hydrate solution as fuel, oxygen as oxidant. Using Nafion117 and 112 membranes as electrolytes, using the positive electrode prepared in Example 1 and the negative electrode prepared in Example 2 to assemble a direct hydrazine fuel cell, its performance at room temperature and 80 ° C is as follows Image 6 and 7 shown.
Embodiment 3
[0039] Disperse 10g of carbon nanotubes into 200ml of methanol to form a suspension; add hydrochloric acid to adjust the pH to 3, and stir at room temperature for 40 minutes; add 4g of pyrrole monomer, and stir for 15 minutes at room temperature. Then add 10 g of anhydrous FeCl 3 , stirred at room temperature for 3h. After slowly adding 600ml of alkaline sodium borohydride solution, sodium borohydride and anhydrous FeCl 3 The molar mass ratio of the mixture was 1:2, stirred vigorously for 60 minutes, cooled naturally, washed with deionized water and filtered, and dried in vacuum at 90°C for 9 hours. Obtain polypyrrole-modified carbon nanotube-supported iron-based composite catalyst after drying, and its scanning electron micrograph is as follows: Figure 8 shown. Figure 9 Its high-magnification scanning electron microscope pictures. The molar content of N atoms in the catalyst was 5%, resulting in a molar content of Fe atoms of 15%.
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