Magnetically isolable Pd(0) nanoparticles supported on surface functionalized Fe₃O₄ for hydrogen generation via ammonia borane hydrolysis

Abstract

Pd(0) nanoparticles supported on surface functionalized magnetite (Fe3O4/SiO2‐NH2/HB@Pd) were prepared as catalyst for hydrolysis of ammonia borane (AB). The obtained magnetic nanocomposite material was seperated from the reaction media through a permanent magnet and characterized by FT‐IR, XRD, SEM‐EDX, TEM, ICP‐OES and XPS techniques. 100 mg Fe3O4/SiO2−NH2/HB@Pd nanocomposite with Pd metal content of 6.00±0.14 catalyzed the hydrolysis of 10 mM AB at 25 °C with 100 % yield. The presented work includes the effect of catalyst amount and temperature on the rate of the hydrolysis reaction of AB. As a result of the kinetic studies, the activation energy (Ea) for the Fe3O4/SiO2−NH2/HB@Pd catalyzed AB hydrolysis reaction was calculated as 34±1 kJ.mol−1, and the TOF value was calculated as 133 mol H2.(mol Pd(0).h)−1. The designed heterogenous magnetic nanocomposite catalyst demonstrated significant catalytic activity for AB hydrolysis reaction at 25 °C.

Investigation of Drug Release Behavior of Cyclomatrix Polyphosphazene Microparticles Decorated with Gold and Silver Nanoparticles

“…For this reason, synthesis in the presence of any support material or stabilizing agent is generally preferred to preserve nanoscale properties [8] . Inorganic oxides, [9,10] fly‐ash particles, [11] polymeric particles, [12] hydrogels [13–17] and water‐soluble polymers [18] can be counted among the materials that are frequently preferred as stabilizer/support materials in the synthesis of metallic nanoparticles. The most common metallic nanoparticles in nanobiotechnology are gold and silver nanoparticles.…”