Recebido em 06/04/2020; aceito em 14/07/2020; publicado na web em 10/09/2020 In order to increase the specific surface area of Pt-Rh-Pd / Al 2 O 3 automotive three-way catalyst and improve its low-temperature reduction performance, Ce, Zr, and La were added to the Pt-Rh-Pd / Al 2 O 3 catalyst to prepare the fibrous Pt-Rh-Pd / CeO 2 -ZrO 2 -La 2 O 3 -Al 2 O 3 catalyst via an electrospinning technique. The fibrous catalysts were characterized by XRD, FT-IR, SEM-EDS, H 2 -TPR and BET analysis. The

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... catalytic effect of the catalyst on automobile exhaust was also studied. Results revealed that the surface of catalysts is mainly mesoporous. Ce, Zr and La can remarkably increase the specific surface area of the Pt-Rh-Pd / Al 2 O 3 catalyst. The specific surface area of the catalyst prepared with Pt Rh Pd molar ratio of 0.75:0.01:1 is 301.5816 m 2 g -1 , and the average diameter of which is 790 nm. In addition, the reaction temperature of the catalyst is approximately 220 °C, which shows good low-temperature reduction performance. Moreover, the Pt-Rh-Pd / CeO 2 -ZrO 2 -La 2 O 3 -Al 2 O 3 catalyst has a catalytic conversion efficiency for NO X of 90.0% in automobile exhaust, a catalytic conversion efficiency for CO of 88.8%, and a catalytic conversion efficiency for SO 2 of 75%.