Fuel cell catalyst with conductive ceramic containing carbon nanometer layer as supporter and preparation method thereof
A technology of fuel cells and conductive ceramics, applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low electrical conductivity of ceramics and the inability to build electronic channels in the catalyst layer, and achieve high electrochemical active area , high methanol formic acid oxidation ability, beneficial to deposition and dispersion
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Embodiment 1
[0033] Weigh 280 mg of silicon carbide powder with an average particle size of 40 nanometers and place it in absolute ethanol for ultrasonic dispersion, then drop the prepared solution on the silicon substrate to form a film on its surface; put the prepared film sample into the test In the Fenman type gas ion source, feed methane gas and keep the pressure at 2×10 -1 Pa, and the energy used is 80 electron volts, and the current intensity is 60 microamperes / cm 2The sample is irradiated with an electron beam for 1 hour, and the temperature of the sample is kept at 400 ° C to obtain a carbon-coated silicon carbide carrier, and the thickness of the coated carbon film layer is 0.8 nanometers; the prepared carbon-coated silicon carbide carrier and 50 mL of 1.4 mg / mL HO 2 PtCl 6 ·6H 2 A solution mixed in O, in N 2 Stir under protection for 10-20 minutes to form a uniform mixed solution, then add 2 mol / L NaOH solution drop by drop to adjust the pH value of the mixed solution to 9-1...
Embodiment 2
[0037] Weigh 280 mg of titanium dioxide powder with an average particle size of 60 nanometers and place it in absolute ethanol for ultrasonic dispersion, then drop the prepared solution on the silicon substrate to form a film on its surface; put the prepared film sample into the Kauf In the Mann type gas ion source, feed ethane gas and keep the pressure at 3×10 -1 Pa, and the energy used is 80 electron volts, and the current intensity is 60 microamperes / cm 2 The sample was irradiated with an electron beam for 1.5 hours, and the temperature of the sample was kept at 500 ° C to obtain a carbon-coated titanium dioxide support, and the thickness of the coated carbon film layer was 1.2 nanometers; the prepared carbon-coated titanium dioxide support was mixed with 50 ml 1.4 mg / ml H 2 PtCl 6 ·6H 2 A solution mixed in O, in N 2 Stir under protection for 10-20 minutes to form a uniform mixed solution, then add 2 mol / L NaOH solution drop by drop to adjust the pH value of the mixed s...
Embodiment 3
[0039] Weigh 280 mg of titanium tetraoxide powder with an average particle size of 50 nanometers and place it in absolute ethanol for ultrasonic dispersion, then drop the configured solution on the silicon substrate to form a film on the surface; put the prepared film sample on Enter the Kaufmann type gas ion source, feed propane gas, and keep the pressure at 3.5×10 -1 Pa, and the energy used is 80 electron volts, and the current intensity is 60 microamperes / cm 2 The sample was irradiated with an electron beam for 3 hours, and the temperature of the sample was kept at 570°C to prepare a carbon-coated heptanite tetraoxide carrier, and the thickness of the coated carbon film layer was 1.4 nanometers; the prepared carbon-coated heptoxide Titanium support with 1.4 mg / ml PdCl in concentrated HCl 2 50 ml of the solution is mixed with 150 ml of ethylene glycol, and the 2 Stir under protection for 10-20 minutes to form a uniform mixed solution, then add 2 mol / L NaOH solution dropwis...
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