In this study, aiming to obtain highly active methane dry reforming (DRM) catalysts with superior coke-resistance. Nanocasting method selecting KIT-6 as hard-template has been employed to synthesize mesoporous La₂O₃ support, which was applied to support Ni nanoparticles for DRM reaction. N₂ adsorption-desorption demonstrates that mesoporous structure is well formed in the La₂O₃-KIT-6 support with high specific surface area of 81.2 m² g⁻¹. As support for Ni, much smaller Ni particle size with higher Ni dispersion could be achieved, as evidenced by XRD and H₂-TPD results. In addition, XRD and TGA/DSC results indicated that on the 5%Ni/La₂O₃–S and 5%Ni/La₂O₃-HT catalysts, the generated La₂O₂CO₃ cannot react timely with the coke due to the poor Ni dispersion, resulting the accumulation of the both on the catalysts surface. However, La₂O₃-KIT-6 support with high surface area can highly disperse Ni active sites and enlarged the interfaces between La₂O₂CO₃ and Ni, thus facilitate the reaction between the coke and the La₂O₂CO₃ species and keep the surface of Ni sites more clean and active. Therefore, Ni/La₂O₃-KIT-6 catalyst exhibits excellent catalytic performance as well as the coke-resistance.

在这项研究中，旨在获得具有优异耐焦炭性的高活性甲烷干重整（DRM）催化剂。采用以KIT-6为硬模板的纳米浇铸法合成了介孔La ₂ O ₃载体，该载体用于负载Ni纳米颗粒进行DRM反应。N ₂吸附-解吸表明，在具有21.2 m ²  g ^-1的高比表面积的La ₂ O ₃ -KIT-6载体中良好地形成了中孔结构。XRD和H ₂证明，作为Ni的载体，可以实现更小的Ni粒径和更高的Ni分散度。-TPD结果。此外，XRD和TGA / DSC结果表明，在5％Ni / La ₂ O ₃ -S和5％Ni / La ₂ O ₃ -HT催化剂上，生成的La ₂ O ₂ CO ₃无法与焦炭及时反应。由于不良的Ni分散，导致两者均在催化剂表面积聚。然而，具有高表面积的La ₂ O ₃ -KIT-6载体可以高度分散Ni活性位点，并扩大La ₂ O ₂ CO ₃和Ni之间的界面，从而促进焦炭与La ₂ O ₂ CO之间的反应。₃种，并保持镍位点表面更清洁和活跃。因此，Ni / La ₂ O ₃ -KIT-6催化剂表现出优异的催化性能以及耐焦炭性。