La modified TiO₂ prepared by sol–gel method as the support of Fe–Mn/TiO₂(xLa) catalyst significantly improved SO₂ resistance. La inhibited the growth of TiO₂ particle, and led to the obvious layered structure of TiO₂ and more mesopores, which accelerated the decomposition of ammonium sulfate. The increase of Brønsted acid sites and the electron transfer between La and active components Fe and Mn in La doped catalysts inhibit the adsorption and oxidation of SO₂ on the catalyst, thus improving the SO₂ resistance.

中文翻译：

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La改性Fe–Mn / TiO 2催化剂可提高NH 3 -SCR的低温SO 2耐受性

通过溶胶-凝胶法制备的La改性TiO ₂作为Fe-Mn / TiO ₂（x La）催化剂的载体，显着提高了SO _2的耐受性。的La抑制二氧化钛的生长₂颗粒，并导致TiO 2的明显分层结构₂和多个孔，其中加速硫酸铵的分解。La掺杂催化剂中布朗斯台德酸位的增加以及La与活性成分Fe和Mn之间的电子转移抑制了SO ₂在催化剂上的吸附和氧化，从而提高了SO _2的耐受性。