A kind of preparation method of fuel cell catalyst with low PT load using MOF as template
A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited application, achieve the effects of reducing growth and migration, slowing down migration and agglomeration, and improving quality and activity
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Embodiment 1
[0031] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:
[0032] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:0.7:0.7) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;
[0033] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, the MOF material impregnated with Pt was obtained by vacuum drying;
[0034] Step ...
Embodiment 2
[0040] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:
[0041] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:1:0.5) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;
[0042] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, vacuum dry for later use;
[0043] Step 3) Preparation of catalyst with low Pt loadi...
Embodiment 3
[0045] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:
[0046] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:1:0.7) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;
[0047] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, vacuum dry for later use.
[0048] Step 3) Preparation of catalysts with low Pt load...
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