Pd(II) ions were introduced into Mg0.7Al0.3(OH)2(CO3)0.15·mH2O through the co-precipitation of the corresponding nitrate salts at a constant pH value. The presence of Pd in the brucite-like layers affects an increased surface area and decreased crystal domain of the Mg–Al hydrotalcite catalysts. Pd(II) ions may exist in both intra- and extra- brucite-like layers and exhibit different roles in the oxidation of styrene with t-BuOOH, depending on the amount of palladium. The insertion of Pd(II) into the hydrotalcite lattice has significantly improved the catalyst stability. The highest conversion of styrene is about 80% for the production of styrene oxide and benzaldehyde at low temperatures.
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This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant No. 104.05-2017.04. We would like to acknowledge the RoHan Project supported by German Academic Exchange Service (DAAD, No. 57315854) and the German Federal Ministry for Economic Cooperation and Development (BMZ) inside the framework “SDG Bilateral Graduate school program”.
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Thao, N.T., Huyen, L.T.K. & Köckritz, A. Catalytic Role of Pd(II) Ions in Mg–Al Hydrotalcites for the Oxidation of Styrene. Catal Lett 149, 3370–3383 (2019). https://doi.org/10.1007/s10562-019-02915-3
- Pd-doped hydrotalcite
- Styrene oxide