| abstract |
The invention relates to the technical field of exhaust gas purification, and provides a catalyst for purifying automobile exhaust gas and a preparation method. The catalyst is electrostatically sprayed and deposited on the surface of the carrier by using silicon carbide particles as a carrier, and a slurry formed by silane coupling agent, aluminum diboride, silicone resin, thickener and organic solvent, and then calcined by staged heating. It is prepared by forming Al 2 O 3 /B 2 O 3 coating, and then carrying out the loading of noble metal active components. The Al 2 O 3 /B 2 O 3 coating formed by the method is firmly combined with the silicon carbide carrier, is not easy to fall off, and has a large specific surface area, which is beneficial to improve the activity of the catalyst and prolong the service life of the catalyst. |