Research Project: Etkinliği Yüksek, Ekonomik ve Tekrar KullanılabilirKatalizör Olarak Grafene Desteklenmiş Bimetalik Rutenyum Alaşım Nanopartikülleri : Sentezi, Yapısal Tanımlamaları ve Kataliz Uygulamaları
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Contributors
Funders
ID
TB.00385
Authors
Metin, Önder
Faculty Member
Publications
A facile synthesis of monodisperse cobalt–ruthenium alloy nanoparticles as catalysts for the dehydrogenation of morpholine borane and the hydrogenation of various organic compounds
(Royal Society of Chemistry, 2022) Metin, Önder; Can, Hasan; Can, Sumeyra; Ebiri, Rustem; Department of Chemistry; Yes; College of Sciences
Herein we report a novel wet-chemical protocol for the composition-controlled synthesis of monodisperse cobalt-ruthenium (CoRu) alloy NPs and their catalysis in the hydrolytic dehydrogenation of morpholine borane (MB) for chemical hydrogen storage and the hydrogenation of various organic compounds using MB as a hydrogen source. Monodisperse CoRu NPs with an average particle size of 1.7 +/- 0.6 nm at three different alloy compositions were prepared by the presented novel protocol that comprises the reduction of in situ formed ruthenium(iii) oleate complex with dicobalt octacarbonyl (Co-2(CO)(8)) in the presence of oleylamine (OAm). Next, as-synthesized CoRu alloy NPs were supported on carbon black (VC) and reduced graphene oxide (rGO) to study their catalysis in the dehydrogenation of MB and the transfer hydrogenation of various organic compouns bearing unsaturated functional groups (nitro, nitrile and carbonyl) using MB as a hydrogen source, respectively. VC-CoRu nanocatalysts exhibited a higher catalytic activity in hydrogen generation from the hydrolysis of MB with an initial turnover frequency (TOF) of 95 mol H-2*(mol (Co + Ru) min)(-1) while rGO-CoRu nanocatalysts showed better catalytic performance in the transfer hydrogenation reactions. All tested unsatured organic compounds (30 examples in total) are converted into corresponding hydrogenated products with the yields reaching up to 99% under mild conditions.
Hydrogen generation via the catalytic hydrolysis of morpholine-borane: a new, efficient and cost-effective hydrogen storage medium
(Elsevier, 2019) Metin, Önder; Can, Hasan; Department of Chemistry; Yes; College of Sciences
Herein, for the first time, we introduce the morpholine-borane complex (MB) as a new, efficient, cost-effective and commercially available chemical hydrogen storage material for mobile applications. In this regard, hydrogen production from the hydrolysis of MB catalyzed by in situ generated water-soluble polymer stabilized Ag(0) and Pd(0) nanoparticles (NPs) is reported for the first time. In situ generated PSMA-stabilized Ag(0) and Pd(0) NPs showed remarkable activity in hydrogen production from the hydrolysis of MB at room temperature, providing initial TOFs of 16.1 min(-1) and 37.3 min(-1), respectively. A set of kinetic studies on the catalytic hydrolysis of MB were conducted by changing the catalyst/substrate amount and temperature, and the rate law expression and activation parameters were produced by collecting the kinetic data. The apparent activation energies for the in situ generated Ag(0) and Pd(0) NPs catalyzed MB hydrolysis were calculated to be 71.4 and 32.5 kJ mol(-1), respectively.
