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Fabrication of hydrophobic Pd/Al2O3-phosphoric acid via P O Al bond for liquid hydrogenation reaction by Lu Lv; Min Zhao; Yanan Liu; Yufei He; Dianqing Li is a Engineering article available to read on EtoBox.

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Alumina (Al2O3) is widely used in the chemical industry as the catalyst and support due to its high specific surface area, abundant pore size distribution and chemical stability. However, the occurrence of hydration in water environment, result in outstanding decrease in specific surface area and collapse of pore structure. In this work, dodecyl phosphoric acid (PA) is used to modify the surface of Al2O3 to obtain a series of hydrophobic material (Al2O3-PA). Based on XPS and NMR analysis, PA is chemically bonded on Al2O3 to form POAl bond. Furthermore, BET and WCA results display that Al2O3-1PA exhibits excellent the hydrophobicity and hydrothermal stability while maintains the pore structure. Take it as the substrate to support the Pd nanoparticles, the as-prepared Pd/Al2O3-PA shows the superior catalytic performance in the hydrogenation of phenol and anthraquinone relative to Pd/Al2O3, indicating the accessibility of Pd sites after PA modification. Especially, the significantly enhanced stability is also obtained in four cycles for aqueous phenol hydrogenation. This can be ascribed that the PA modification inhibits the aggregation of Pd nanoparticles and the products adhesion in

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Author

Lu Lv; Min Zhao; Yanan Liu; Yufei He; Dianqing Li

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)