Catalytic thermal hydrogenation of CO₂ to CH₄ with renewably produced H₂ is one of the routes to reduce the CO₂ concentration in the atmosphere. In this respect, various catalysts have been developed. Among them, 5% Ru-loaded Al₂O₃ [Ru(5%)-Al₂O₃] has shown the highest performance, at 300 °C, in terms of the intrinsic reaction rate and the turnover frequency (TOF), which were 38 mmol_CH4 g⁻¹h⁻¹ and 1188 h⁻¹, respectively. The CH₄ selectivity of the catalyst was 95%. Despite of the above and other achievements, the developments of the catalysts that exhibit higher performances should be continued. This work now reports that 1% Ru-loaded ETS-10 [Ru(1%)-ETS-10] and 1% Ru-loaded TiO₂ [Ru(1%)-TiO₂] give the intrinsic reaction rates of 329 and 266 mmol_CH4 g⁻¹h⁻¹, TOFs of 3321 and 2684 h⁻¹ with the CH₄ selectivities of 85.8 and 97.9%, respectively. In particular, Ru(1%)-ETS-10 is superior to Ru(1%)-TiO₂ in terms of the stability (stable for more than 130 h). The analyses of the above three catalysts suggested the guidelines to prepare high performance catalysts, which are the support should be microporous materials and should possess the capability to introduce metal ions into the support by cation exchange so that they can be activated to metal nanoparticles by reduction, the support should be able to stabilize the metal nanoparticles, the active metal catalysts should be 2–5 nm sized three-dimensional (3D) Ru_x nanoparticles, the loading level of Ru_x nanoparticles should be 1%, the support should have the affinity to capture CO₂ so that the catalyst can have the dual functionality of CO₂ capture and CO₂ reduction, the Ru_x nanoparticles should be highly basic, and the prepared Ru_x nanoparticles should not be poisoned by CO.

用可再生产生的H _{2将CO 2}催化热加氢为CH _{4是降低大气中CO 2}浓度的途径之一。在这方面，已经开发了各种催化剂。其中，负载 5% Ru 的 Al ₂ O ₃ [Ru(5%)-Al ₂ O ₃ ] 在 300 °C 的本征反应速率和转换频率 (TOF) 方面表现出最高的性能，分别为 38 mmol _CH4 g ^-1 h ^-1和 1188 h ^-1。CH ₄催化剂的选择性为95%。尽管取得了上述和其他成就，但应继续开发表现出更高性能的催化剂。这项工作现在报道了 1% Ru 负载 ETS-10 [Ru(1%)-ETS-10] 和 1% Ru 负载 TiO ₂ [Ru(1%)-TiO ₂ ] 给出了 329 和266 mmol _CH4 g ^-1 h ^-1，3321 和2684 h ^-1的TOF ，CH ₄选择性分别为85.8 和97.9%。特别是Ru(1%)-ETS-10优于Ru(1%)-TiO ₂在稳定性方面（稳定超过 130 小时）。对上述三种催化剂的分析提出了制备高性能催化剂的指导方针，即载体应为微孔材料，并具有通过阳离子交换将金属离子引入载体的能力，使其能够通过还原活化为金属纳米颗粒。 , 载体应该能够稳定金属纳米粒子, 活性金属催化剂应该是 2-5 nm 尺寸的三维 (3D) Ru _{x纳米粒子, Ru x}纳米粒子的负载水平应该是 1%, 载体应该有捕获CO ₂的亲和力使催化剂具有CO ₂捕获和CO _{2的双重功能}还原时，Ru _x纳米粒子应具有高碱性，制备的 Ru _x纳米粒子不应被 CO 毒化。