Carbon supported Pd based catalysts for the hydrolytic dehydrogeneration of morpholine borane. (December 2022)

• Record Type: Journal Article
• Authors: Gulbay, Senem Karahan; Kaymaz, Mulkiye; Gulbagca, Fulya; Sen, Fatih
• Is Part Of: Chemosphere. Volume 309:Part 1(2022)
• Publication Date: 2022-12
• Subjects: Hydrogen production -- Morpholine borane -- PdNi/C -- Sodium borohydride -- Chemical reduction -- Catalyst; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.136674
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: 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 Pd50 Ni50 /C nanoparticles exhibited better catalytic behavior, and optimization studies were carried out with Pd50 Ni50 /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 Pd50 Ni50 /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 Pd50 Ni50 /C nanoparticles synthesized by the chemical method is high and their catalytic activity is excellent. Graphical abstract: Image 1 Highlights: Activated carbon supported Pd, PdAg, PdNi, and PdCo NPs were synthesized. The catalytic activities of NPs synthesized by chemical synthesis were tested. Pd50 Ni50 /C NPs were investigated to obtain hydrogen from Morpholine Borane. Ea, and ΔH values were 93.2 kJ/mol, 90.6 kJ/mol, respectively.