A kind of non-precious metal single-atom fuel cell cathode catalyst, its preparation and application
A fuel cell cathode and non-precious metal technology, applied in the field of electrochemical catalysis, can solve the problems of poor high-temperature cycle stability of catalysts, and achieve excellent high-temperature cycle stability, good dispersion, and enhanced binding force
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[0031] A method for preparing a non-noble metal single-atom fuel cell cathode catalyst provided by the invention comprises the following steps:
[0032] (1) mixing the first comonomer, the second comonomer, the initiator and the metal salt of the transition metal, the first comonomer and the second comonomer undergo a copolymerization reaction under the action of the initiator, and simultaneously The metal ion in the metal salt undergoes a complex reaction with the organic functional groups in the first comonomer and the second comonomer, and the first solution is obtained after the reaction; the first comonomer and the second comonomer The comonomers all contain organic functional groups capable of complexing and coordinating with metal ions; the first comonomer, the second comonomer and the metal ions form a copolymer through complexing and coordinating reactions;
[0033] (2) fully react after the first solution is mixed with the nitrogen-containing precursor, evaporate to ...
Embodiment 1
[0051] First weigh 0.050g of acrylic acid, add it into 100°C water, then add 0.950g of acrylonitrile into the solution, when a transparent solution is formed, add 1g of FeCl 3 Salt, forming a reddish-brown solution. The principle is that the carboxyl group in the ligand undergoes a complex reaction with the metal ion, and the metal ion is evenly dispersed in the ligand. The introduction of acrylonitrile can bring some additional functional groups that are more beneficial to the metal ion. The key technical parameters of dispersion and fixation are acrylic acid, and the introduction of copolymerization ligands can better disperse metal ions in the solution. Subsequently, ammonium persulfate was added to the above solution as an initiator to initiate the copolymerization reaction of acrylonitrile and acrylic acid, and then stirred in the solution at 100°C for 96 hours, then 1 g of nitrogen-containing precursor dicyandiamide was added, and stirred for another 12 hours, and the con...
Embodiment example 2
[0053] First weigh 0.050g of acrylic acid, add it to 30°C water, then add 0.950g of acrylonitrile to the solution, when a transparent solution is formed, add 1g of CoCl 2 Salt, forming a pink solution. The principle is that the carboxyl group in the ligand undergoes a complex reaction with the metal ion, and the metal ion is evenly dispersed in the ligand. The introduction of acrylonitrile can bring some additional functional groups that are more conducive to the metal ion. For dispersion and fixation, the key technical parameters are acrylic acid, and the introduction of co-polymerization ligands can better disperse metal ions in the solution. Subsequently, ammonium persulfate was added to the above solution as an initiator to initiate the copolymerization reaction of acrylonitrile and acrylic acid, and then stirred in the solution at 30°C for 96 hours, then 1 g of nitrogen-containing precursor urea was added, and stirred for another 12 hours, and the container was opened at 3...
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