Heat treatment process for improving oxygen reduction catalytic activity of non-noble metal catalyst
A catalytically active, non-precious metal technology, used in electrical components, battery electrodes, circuits, etc., can solve the problems of high load and high cost
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Embodiment 1
[0036] Dissolve 0.3232g of ferric nitrate nonahydrate and 2.7369g of zinc nitrate hexahydrate in 400ml of methanol solution, and stir on a magnetic stirrer until the prepolymer solid is completely dissolved. Then, 4.105 g of 2-methylimidazole was added into 400 ml of methanol solution, and stirred on a magnetic stirrer until the 2-methylimidazole was completely dissolved. Next, the above two mixture solutions were poured into a three-necked flask, and heated in a water bath at 60° C. for 24 h. The supernatant of the reacted sample was poured off, the sample was centrifuged, washed, and vacuum-dried at 60° C. for 12 hours. The above-mentioned dried samples were heated up to 200° C. at a rate of 5° C. / min under an Ar atmosphere, and kept at this temperature for 1 h. Then, the temperature was raised from 200°C to 1000°C at the same rate of 5°C / min, and the calcination was maintained for 1 h. Cool naturally to obtain a Fe-N-C catalyst sample.
Embodiment 2
[0038] Dissolve 0.3232g of ferric nitrate nonahydrate and 2.7369g of zinc nitrate hexahydrate in 400ml of methanol solution, and stir on a magnetic stirrer until the prepolymer solid is completely dissolved. Then, 4.105 g of 2-methylimidazole was added into 400 ml of methanol solution, and stirred on a magnetic stirrer until the 2-methylimidazole was completely dissolved. Next, the above two mixture solutions were poured into a three-necked flask, and heated in a water bath at 60° C. for 24 h. The supernatant of the reacted sample was poured off, the sample was centrifuged, washed, and vacuum-dried at 60° C. for 12 hours. The above-mentioned dried samples were heated up to 300° C. at a rate of 5° C. / min under an Ar atmosphere, and kept at this temperature for 1 h. Then, the temperature was raised from 300°C to 1000°C at the same rate of 5°C / min, and the calcination was maintained for 1 h. Cool naturally to obtain a Fe-N-C catalyst sample.
Embodiment 3
[0040]Dissolve 0.3232g of ferric nitrate nonahydrate and 2.7369g of zinc nitrate hexahydrate in 400ml of methanol solution, and stir on a magnetic stirrer until the prepolymer solid is completely dissolved. Then, 4.105 g of 2-methylimidazole was added into 400 ml of methanol solution, and stirred on a magnetic stirrer until the 2-methylimidazole was completely dissolved. Next, the above two mixture solutions were poured into a three-necked flask, and heated in a water bath at 60° C. for 24 h. The supernatant of the reacted sample was poured off, the sample was centrifuged, washed, and vacuum-dried at 60° C. for 12 hours. The above-mentioned dried samples were heated up to 400° C. at a rate of 5° C. / min under an Ar atmosphere, and kept at this temperature for 1 h. Then, the temperature was raised from 400 °C to 1000 °C at the same rate of 5 °C / min, and the calcination was maintained for 1 h. Cool naturally to obtain a Fe-N-C catalyst sample.
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