Iron and nitrogen-doped carbon nanosphere preparation method and oxygen reduction application
A carbon nano-microsphere, double-doping technology, applied in the fields of nanomaterials and catalysis, can solve the problems of slow oxygen reduction kinetics, limited fuel cell efficiency, etc., and achieve the effects of abundant yield, good conductivity and simple preparation method.
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Embodiment 1
[0025] The first step is the synthesis of polydopamine-coated iron ferric oxide microspheres: the polydopamine-coated iron ferric oxide microspheres are obtained by stirring ferric iron tetroxide and polydopamine in a Tris solution for a long time. First, Fe 3 o 4 Synthesized by hydrothermal reaction, specific process: 10mmol FeCl 3 Disperse in 100mL ethylene glycol by ultrasonic method, and after stirring for 30min, a clear yellow solution was obtained. Then add 40 mmol CH 3 COONa, after stirring again through 2h, above-mentioned solution is transferred in the reactor of 50mL, 200 o C under reaction for 12h. After cooling to room temperature, the samples were washed with deionized water and ethanol and centrifuged, and after drying, a black magnetic solid was obtained as Fe 3 o 4 . Secondly, polydopamine is obtained by polymerization reaction, specific process: 200mg of dopamine hydrochloride is added to a mixture of 200mL Tris buffer and 60mL isopropanol, stirred for ...
Embodiment 2
[0034] The first step is the synthesis of polydopamine-coated iron ferric oxide microspheres: the polydopamine-coated iron ferric oxide microspheres are obtained by stirring ferric iron tetroxide and polydopamine under air for a long time. First, Fe 3 o 4 Synthesized by hydrothermal reaction, specific process: 10mmol FeCl 3 Disperse in 100mL ethylene glycol by ultrasonic method, and after stirring for 30min, a clear yellow solution was obtained. Then add 40mmol CH 3 COONa, after stirring again through 2h, above-mentioned solution is transferred in the reactor of 50mL, 200 o C under reaction for 12h. After cooling to room temperature, the samples were washed with deionized water and ethanol and centrifuged, and after drying, a black magnetic solid was obtained as Fe 3 o 4 . Secondly, polydopamine is obtained by polymerization reaction, specific process: 200mg of dopamine hydrochloride is added to a mixture of 200mL Tris buffer and 60mL isopropanol, stirred for 24 hours u...
Embodiment 3
[0043] The first step is the synthesis of polydopamine-coated iron ferric oxide microspheres: the polydopamine-coated iron ferric oxide microspheres are obtained by stirring ferric iron tetroxide and polydopamine under air for a long time. First, Fe 3 o 4 Synthesized by hydrothermal reaction, specific process: 10mmol FeCl 3 Disperse in 100mL ethylene glycol by ultrasonic method, and after stirring for 30min, a clear yellow solution was obtained. Then add 40mmol CH 3 COONa, after stirring again through 2h, above-mentioned solution is transferred in the reactor of 50mL, 200 o C under reaction for 12h. After cooling to room temperature, the samples were washed with deionized water and ethanol and centrifuged, and after drying, a black magnetic solid was obtained as Fe 3 o 4 . Secondly, polydopamine is obtained by polymerization reaction, specific process: 200mg of dopamine hydrochloride is added to a mixture of 200mL Tris buffer and 60mL isopropanol, stirred for 24h under ...
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