Carbon supported Pd based catalysts for the hydrolytic dehydrogeneration of morpholine borane.

Although the reducing property of morpholine borane is frequently used, there are few studies on its use as a chemical hydrogen storage material. This study presents the catalyst efficiency for hydrogen production in the dehydrogenation reaction of morpholine borane as efficient and cost-effective hydrogen storage material, which can be used as an alternative to depleting fossil fuels. It was studied with four different catalysts as activated Carbon-supported Pd, PdAg, PdNi, and PdCo. Bimetallic palladium based catalysts were used for the dehydrogenation of morpholine borane for the first time. Nanoparticles were synthesized using the chemical reduction method. The catalytic effects of different metal ratios of PdNi/C nanoparticles, which were concluded to have the best catalyst effect, were investigated and it was observed that the ratio of Pd50Ni50/C nanoparticles exhibited better catalytic behavior, and optimization studies were carried out with Pd50Ni50/C nanoparticles. Transmission Electron Microscopy, X-Ray Diffraction, and X-Ray Photoelectron Spectroscopy analyzes were performed for the characterization of nanoparticles. According to the characterization analyzes of Pd50Ni50/C nanoparticles, the mean particle size was determined as 2.0 ± 1.0 nm. Catalyst efficiency was determined by performing the substrate, catalyst, and temperature experiments separately in the dehydrogenation reaction of Morpholine Borane. These parameters are respectively; Ea and ΔH were calculated as 93.2 kJ/mol, and 90.6 kJ/mol. The reusability experiments were carried out in 4 cycles. In other words, with this study, it was concluded that the reusability of Pd50Ni50/C nanoparticles synthesized by the chemical method is high and their catalytic activity is excellent.

Highly monodisperse Pd-Ni nanoparticles supported on rGO as a rapid, sensitive, reusable and selective enzyme-free glucose sensor.

In this work, highly monodispersed palladium-nickel (Pd-Ni) nanoparticles supported on reduced graphene oxide (rGO) were synthesized by the microwave-assisted methodology. The synthesized nanoparticles were used for modification of a glassy carbon electrode (GCE) to produce our final product as PdNi@rGO/GCE, which were utilized for non-enzymatic detecting of glucose. In the present study, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA) and, cyclic voltammetry (CV) methods were implemented to investigate the sensing performance of the developed glucose electrode. The modified electrode, PdNi@rGO/GCE, exhibited very noticeable results with a linear working range of 0.05-1.1 mM. Moreover, an ultralow detection limit of 0.15 µM was achieved. According to the results of amperometric signals of the electrodes, no significant change was observed, even after 250 h of operation period. In addition, the highly monodisperse PdNi@rGO/GCE was utilized to electrochemical detection of glucose in real serum samples. In light of the results, PdNi@rGO/GCE has shown an excellent sensing performance and can be used successfully in serum samples for glucose detection and it is suitable for practical and clinical applications.