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- W398060413 abstract "Palladium metal nanoparticles have been applied to hydrodechlorination of chlorophenols in contaminated water using H2 as a clean and sustainable reductant. However, there are two major challenges to widespread technology adoption which are the activity loss caused by nanoparticle aggregation and the difficulty of nanoparticle recovery. In this study, a synthesis of a core-shell structured catalyst with encapsulated Pd nanoparticles has been given and whose catalytic activity has been tested in hydrodechlorination of chlorophenols under 1 atm H2 at room temperature. The catalyst material consists of a nonporous silica core decorated with Pd nanoparticles that are further encapsulated within an ordered mesoporous silica shell. Well-defined mesopores (2.4 nm) provide a physical barrier to prevent Pd nanoparticle (∼10 nm) movement, aggregation and detachment from the support into water. Compared with some supported Pd catalysts such as Pd/AC and Pd/Al2O3, SiO2/[email protected]2 exhibits higher catalytic performance. After 5 times of recycling, catalytic activity of SiO2/[email protected]2 reduces slightly and this result confirms the good recyclability of SiO2/[email protected]2. The function of the mesoporous shell, preventing aggregation of active nanoparticles, suggests a promising general strategy of using metal nanoparticle catalysts for water purification and related aqueous-phase applications." @default.
- W398060413 created "2016-06-24" @default.
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- W398060413 date "2015-09-01" @default.
- W398060413 modified "2023-09-26" @default.
- W398060413 title "Hydrodechlorination of chlorophenols catalyzed by SiO2/Pd@m-SiO2 core-shell structured catalyst" @default.
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- W398060413 doi "https://doi.org/10.1016/j.molcata.2015.05.016" @default.
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