The prepared mesoporous silica SBA-15 was modified by doping with La by an incipient wet impregnation method. XRD, TEM, NMR and FT–IR were used to evaluate the influence of La doping amounts on the structure and hydrothermal stability of SBA-15. The results showed that the introduction of La could significantly improve the hydrothermal stability of the mesoporous silica SBA-15. The silanol groups on the defect sites of pore surface are the main place for lanthanum to enter. After being treated with steam at 750 °C for 40 h, La-SBA-15 with appropriated amount of La loading maintained a highly ordered structure. In addition, a mesoporous Ni/5La-SBA-15 catalyst was prepared by an incipient wet impregnation method, and steam reforming of methane was carried out on this catalyst for 100 h at 750 °C with CH₄:H₂O:N₂ = 4:12:1. During the reaction, the CH₄ conversion rate remained unchanged, and the catalyst activity did not decrease, confirming that La-SBA-15 can be used as a hydrothermally stable support for catalytic reactions contained steam.

制备的介孔二氧化硅SBA-15通过初始湿浸法掺杂La进行改性。XRD、TEM、NMR 和 FT-IR 用于评估 La 掺杂量对 SBA-15 结构和水热稳定性的影响。结果表明，La的引入可以显着提高介孔二氧化硅SBA-15的水热稳定性。孔隙表面缺陷部位的硅烷醇基团是镧进入的主要场所。在 750 °C 下用蒸汽处理 40 h 后，La-SBA-15 以适当的 La 负载量保持高度有序的结构。此外，通过初始湿浸法制备了介孔Ni/5La-SBA-15催化剂，并在750°C下用CH ₄ :H在该催化剂上进行甲烷蒸汽重整100 h₂ O:N ₂  = 4:12:1。在反应过程中，CH ₄转化率保持不变，催化剂活性没有降低，证实了 La-SBA-15 可以作为水热稳定的载体用于含蒸汽的催化反应。