The intermittency in power generation that characterizes renewable energy sources requires a way to convert the energy surplus. Among all the possibilities, the conversion of power in hydrogen via water electrolysis and then into methane via CO₂ methanation represents a competitive storage system. CO₂ methanation is an exothermic reaction which requires the use of low temperatures in order to achieve sufficiently high conversions: for this reason, there is a strong need in low-temperature active catalyst. In this work, several Ru/CeO₂-ZrO₂ and Ru-Ni/CeO₂-ZrO₂ were prepared and compared with Ni/CeO₂-ZrO₂, in order to evaluate the effect of Ru loading and Ru precursor salt. The results showed that in monometallic formulations the higher was the Ru amount the better were the reaction performances achieved, particularly at low temperatures. In bimetallic formulations, the presence of Ru enhances the catalyst activity; in particular, the use of the Ru acetylacetonate, for the deposition of the noble metal on support, remarkably reduces the catalyst onset temperature. The effect is due to the templating effect of the precursor molecule, which allows a better dispersion of the active compounds.

表征可再生能源的发电间歇性需要一种转换能源剩余的方法。在所有可能性中，通过水电解将氢中的能量转换为二氧化碳，然后通过CO ₂甲烷化将其转换为甲烷是一种有竞争力的存储系统。CO ₂甲烷化是放热反应，需要使用低温才能实现足够高的转化率：因此，强烈需要低温活性催化剂。在这项工作中，制备了几种Ru / CeO ₂ -ZrO ₂和Ru-Ni / CeO ₂ -ZrO ₂并与Ni / CeO ₂ -ZrO _{2进行了比较。}，以评估Ru含量和Ru前体盐的作用。结果表明，在单金属配方中，Ru含量越高，反应性能越好，特别是在低温下。在双金属配方中，Ru的存在增强了催化剂的活性。特别是，使用乙酰丙酮钌钌将贵金属沉积在载体上，显着降低了催化剂的起始温度。该作用归因于前体分子的模板作用，这允许活性化合物更好地分散。