DSpace Arşivi :: by Yazar "Al-Areedhee, Ahmed Hammoodi Yousif" değerine göre listeleniyor

Listeleniyor 1 - 1 / 1

Nanotitania supported ruthenium(0) nanoparticles as active catalyst for releasing hydrogen from dimethylamine borane
(Pergamon-Elsevier Science Ltd, 2024) Al-Areedhee, Ahmed Hammoodi Yousif; Karaboğa, Seda; Morkan, İzzet ; Özkar, Saim
We reports the ex situ preparation of nanotitania supported ruthenium(0) nanoparticles (NPs) and their catalytic testing in dehydrogenation of dimethylamine borane (DMAB) in toluene solvent. Ru0/TiO2 NPs are prepared following a 2-step process: Ru3+ ions are first impregnated from the aqueous solution on titania nanopowder and then, reduced by aqueous solution of sodium borohydride. The prepared Ru0/TiO2 NPs are dried, bottled under inert N2 gas atmosphere, and used for characterization by XRD (X-ray powder diffraction), TEM (transmission electron microscopy), ICP-OES (inductively coupled plasma optical emission spectroscopy) and XPS (X-ray photoelectron spectroscopy). Ru0/TiO2 NPs with various Ru loadings are tested as catalysts in hydrogen generation from DMAB and the Ru0/TiO2 (0.48% wt. Ru) with an average diameter of 6.7 +/- 1.3 nm is found to have the highest initial turnover frequency value of 1700 h-1 for the release of 1.0 mol H2 per mole of DMAB at 60 degrees C. Results of the recyclability test indicate quite high durability of Ru0/TiO2 NPs in dehydrogenation of DMAB.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.