A series of supported Ni nanoparticles on a flower-like porous LaNi_0.6Al_0.4O₃ (LNAO) perovskite carrier (zNi/LNAO; z = 5, 10 and 15 wt%) were successfully synthesized using a controlled self-assembly sol-gel method. The experimental results showed that the presence of Ni nanoparticles markedly enhanced the reaction rate of CO conversion, namely from 12.4 mmol/(g_cat h) over LNAO to 244 mmol/(g_cat h) over 10 wt% Ni/LNAO. The porous LNAO perovskite support provides both a large surface area to well disperse Ni nanoparticles and active sites for the methanation reaction, thus resulting in a catalyst with activity (per gram of catalyst basis) at least comparable to other nickel metal-based supported catalysts reported so far and with very good stability. Reaction rates calculated based on Ni exposed surface and total Ni amount revealed that Ni active sites in the Ni nanoparticles and bulk perovskite were distinct.

 使用可控的自组装溶胶-凝胶法成功合成了一系列在花朵状多孔LaNi _0.6 Al _0.4 O ₃（LNAO）钙钛矿载体（z Ni / LNAO; z = 5、10和15 wt％）上负载的Ni纳米颗粒。凝胶法。实验结果表明，Ni纳米颗粒的存在显着提高了CO转化的反应速率，即从LNAO的反应速率从12.4 mmol /（g _cat h）提高到244 mmol /（g _cat h）h）超过10重量％的Ni / LNAO。多孔的LNAO钙钛矿载体既提供了较大的表面积以很好地分散Ni纳米颗粒，又提供了甲烷化反应的活性位点，因此产生的催化剂的活性（每克催化剂基础）至少可与报道的其他镍金属基负载催化剂相比到目前为止，具有非常好的稳定性。基于暴露于Ni的表面和总Ni量计算的反应速率表明，Ni纳米颗粒和块状钙钛矿中的Ni活性位点是不同的。