Oxygen reduction electrocatalyst and preparation method thereof
An electrocatalyst and peroxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of expensive fuel cells and reduce H2O2 Yield, low cost, effect of increasing active site density
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Embodiment 1
[0063] (1) Carbon black screening: Dissolve 2g of Ketjenblack EC600JD carbon black (KJ600 for short) in 300mL of deionized water, and sonicate for 1h. Pass through a 100-200 mesh sieve, and sonicate again for 1 hour. Mechanical stirring further makes the carbon black evenly dispersed in water. Store at a low temperature of 0-10°C for later use. Thermogravimetric results for carbon black, see Figure 4 , curve 1.
[0064] (2) Grafting of carbon black: weigh 0.1-2.4g p-aminobenzenesulfonic acid (p-NH 2 -Ph-SO 3 H) Powdery solid, add 50-100mL ultra-pure water, under the low temperature condition of 0-10 ℃, slowly add 1M NaOH solution cooled by ice water in advance, dissolve p-aminobenzenesulfonic acid under constant stirring, and obtain p-aminobenzenesulfonic acid Sodium (p-NH 2 -Ph-SO 3 Na). Slowly add 1M HCl solution cooled by ice water dropwise while stirring to obtain milky white p-aminobenzenesulfonic acid (p-NH 2 -Ph-SO 3 H) Suspension, and make the solution acidi...
Embodiment 2
[0077] See Table 1 for specific conditions and results.
[0078] Table 1
[0079]
[0080] The change of the carbon black carrier has a significant effect on the activity and the yield of hydrogen peroxide.
Embodiment 3
[0082] See Table 2 for specific conditions and results.
[0083] Table 2
[0084]
[0085] The amount of aminobenzenesulfonic acid derivatives will affect the effect of wrapping.
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