We performed the Ru nanoparticles encapsulation using silica-coated carbon-cobalt nanostructure (with and without amine functionality). The physicochemical properties of the above structures were evaluated using the following analytical techniques such as XPS, EDX, XRD, HR-TEM, and ICP-AES. The analytical data received from the above analysis were found in good correlation to each other and confirm the uniform distribution of ruthenium nanoparticles over the surface of the silica–carbon coated magnetic cobalt system. The uniform Ru dispersion confirms the high catalytic activity during CO2 hydrogenation reaction to formic acid. We also studied the effect of water and correlated the same with the quantity of formic acid. Easy catalyst preparation, hassle-free catalyst isolation under an applied magnetic field, and good catalyst recycling is the major outcome of this proposed work. The effect of the ionic liquid solvent system was also noticed in terms of high reaction rate, good catalyst stability, and nine times catalyst recycling.

中文翻译：

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用于将 CO2 气体可持续加氢成甲酸的磁性 Ru 纳米催化剂

我们使用二氧化硅涂层的碳钴纳米结构（有和没有胺官能团）进行了 Ru 纳米颗粒的封装。使用以下分析技术如XPS、EDX、XRD、HR-TEM和ICP-AES评估上述结构的物理化学性质。发现从上述分析中获得的分析数据相互之间具有良好的相关性，并证实了钌纳米颗粒在二氧化硅 - 碳涂层磁性钴系统的表面上的均匀分布。均匀的 Ru 分散体证实了在 CO2 加氢反应生成甲酸过程中的高催化活性。我们还研究了水的影响，并将其与甲酸的量相关联。简单的催化剂制备，在外加磁场下轻松分离催化剂，良好的催化剂回收利用是这项拟议工作的主要成果。离子液体溶剂体系在反应速率高、催化剂稳定性好、催化剂可循环利用9次等方面的效果也受到关注。