Unprecedented bimetallic cobalt–rhodium layered hydrotalcite-type materials (CoRh-HT) were successfully prepared and used as potential catalysts for highly selective hydroformylation of alkenes to aldehydes. This is the first report on hydroformylation studied using a Co–Rh-based heterogeneous catalyst that contains cobalt present in the Co²⁺ and Co³⁺ oxidation states and rhodium present as an Rh³⁺ ion in the framework. Presence of Rh³⁺ along with Co²⁺ and Co³⁺ in the layered framework was confirmed based on various physicochemical studies such as HRTEM, powder X-ray diffraction, and X-ray photoelectron spectroscopy.

中文翻译：

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铑掺入的单金属钴水滑石型材料：烯烃加氢甲酰化的制备及其应用

成功地制备了前所未有的双金属钴-铑层状水滑石型材料（CoRh-HT），并将其用作潜在的催化剂，将烯烃高度选择性地加氢甲酰基化为醛。这是使用基于Co-Rh的多相催化剂研究加氢甲酰化的第一份报告，该催化剂包含以Co ²⁺和Co ³⁺氧化态存在的钴和在框架中以Rh ³⁺离子形式存在的铑。基于各种物理化学研究，例如HRTEM，粉末X射线衍射和X射线光电子能谱，证实了层状骨架中Rh ³⁺以及Co ²⁺和Co ^3+的存在。