Preparation of highly-active CO2 methanation catalysts and investigation of their practical use

采用多角筒溅射法制备的负载型Ru：Ru/TiO 2催化剂可降低CO2甲烷化反应（CO2 + 4 H2-> CH 4 + 2 H2O）的温度。这一发现有助于解决全球变暖问题。在这项研究中，沉积的金属和载体上的CO2甲烷化反应的影响进行了研究。密度泛函理论分析表明，小颗粒Ru的沉积降低了CO + H -> CHO和CH 3 + H -> CH 4等反应步骤的能垒，从而降低了CO2甲烷化反应的温度。此外，我们改造了多边形桶溅射系统，使催化剂产率的增加。值得注意的是，尽管Ru/TiO 2催化剂是通过大规模多边形桶溅射装置制备的，但所制备的催化剂的物理和催化性能与通过实验室规模装置制备的那些相似。

Temperature of CO2 methanation reaction (CO2 + 4H2 -> CH4 + 2H2O) can be decreased using a catalyst (TiO2-supported Ru: Ru/TiO2) prepared by the polygonal barrel-sputtering method. This finding is useful to solve global warming. In this study, effects of the deposited metals and the supports on the CO2 methanation reaction were investigated. The density functional theory indicated that the energy barriers of the reaction steps such as CO + H -> CHO and CH3 + H -> CH4 decreased by the deposition of the smaller Ru particles, resulting in the low temperature of the CO2 methanation reaction. Furthermore, we remodeled the polygonal barrel-sputtering system, allowing the increase in the catalyst yield. It should be noted that even though the Ru/TiO2 catalysts were prepared by a large scale polygonal barrel-sputtering unit, the physical and catalytic properties of the prepared catalysts were similar to those prepared by the laboratory scale unit.