Saim Özkar

E-mail

sozkar@metu.edu.tr

Department

ORCID

0000-0002-6302-1429

Scopus Author ID

201001004677

Web of Science Researcher ID

ABA-1983-2020

Advances in ruthenium nanocatalysts for hydrogen generation from hydrolysis of ammonia borane Özkar, Saim (2025-07-01) Ammonia borane is highly auspicious hydrogen storage materials releasing H2 through hydrolysis in the presence of a suitable catalyst. Ruthenium is one of the most widely used metals affording high turnover frequency for h...
Oxide coated nickel powder as support for platinum(0) nanoparticles: Magnetically separable catalysts for hydrogen generation from the hydrolysis of ammonia borane Akbayrak, Serdar; Çakmak, Gülhan; Öztürk, Tayfur; Özkar, Saim (2024-10-15) We report the development of a novel method for the preparation of magnetically separable platinum nanoparticles. Magnetic nickel nanopowder is initially synthesized in a radiofrequency plasma reactor where in-line passiva...
Giant, Submicron Size, Yet Nearly Uniform Ir0∼30,000,000 Particles: Synthesis, “Raspberry” Structure, and Resultant Insights into Their Mechanism of Formation Özkar, Saim; MacHale, Luke T.; Finke, Richard G. (2023-01-01) Synthetic conditions have been discovered that yield previously unknown massive, 0.230 ± 0.029 μm (i.e., submicron-sized), yet still near-uniform size, still near-monodisperse, ca. Ir0∼30,000,000 particles. These are the f...
Palladium nanoparticles supported on cobalt(II,III) oxide nanocatalyst: High reusability and outstanding catalytic activity in hydrolytic dehydrogenation of ammonia borane Akbayrak, Serdar; Özkar, Saim (2022-11-01) A new palladium(0) nanocatalyst is developed to enhance the catalytic efficiency of precious metal catalysts in hydrogen generation from the hydrolytic dehydrogenation of ammonia borane. Magnetically separable Pd-0/Co3O4 n...
Recent advances in heterogeneous catalysts for the effective electroreduction of carbon dioxide to carbon monoxide Eren, Enis Oğuzhan; Özkar, Saim (2021-09-15) The electrochemical conversion of carbon dioxide into low carbon fuels is a very convenient way of reducing the concentration of atmospheric CO2, which is the main cause of global warming. CO is known to be the most common...
Cobalt ferrite supported platinum nanoparticles: Superb catalytic activity and outstanding reusability in hydrogen generation from the hydrolysis of ammonia borane Akbayrak, Serdar; Özkar, Saim (2021-08-15) In this work, platinum(0) nanoparticles are deposited on the surface of magnetic cobalt ferrite forming magnetically separable Pt-0/CoFe2O4 nanoparticles, which are efficient catalysts in H-2 generation from the hydrolysis...
Ceria Supported Nickel(0) Nanoparticles: A Highly Active and Low Cost Electrocatalyst for Hydrogen Evolution Reaction Demir Arabacı, Elif; Önal, Ahmet Muhtar; Özkar, Saim (2020-06-01) Herein, we report the development of a nickel-based catalyst obtained by reduction of Ni(2+)ions on the surface of ceria nanopowder using aqueous solution of NaBH4. The catalyst was characterized by X-ray diffraction (XRD)...
Magnetically Separable Rh-0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane Akbayrak, Serdar; Tonbul, Yalcin; Özkar, Saim (2020-03-16) Cobalt(II,III) oxide nanopowders are used as supporting materials for rhodium(0) nanoparticles forming Rh-0/Co3O4 nanocatalysts, which can be prepared by impregnation and sodium borohydride reduction of Rh3+ ions on the su...
Preparation and characterization of a new CdS-NiFe2O4/reduced graphene oxide photocatalyst and its use for degradation of methylene blue under visible light irradiation Bagherzadeh, Mojtaba; Kaveh, Reyhaneh; Özkar, Saim; AKBAYRAK, SERDAR (Springer Science and Business Media LLC, 2018-10-01) In this paper, CdS nanoparticles as a visible light active photocatalyst were coupled by NiFe2O4 and reduced graphene oxide (rGO) to form CdS-NiFe2O4/rGO nanocomposite by facile hydrothermal methods. The CdS-NiFe2O4/rGO na...
Nickel(0) nanoparticles supported on bare or coated cobalt ferrite as highly active, magnetically isolable and reusable catalyst for hydrolytic dehydrogenation of ammonia borane Manna, Joydev; AKBAYRAK, SERDAR; Özkar, Saim (Elsevier BV, 2017-12-15) Nickel(0) nanoparticles supported on cobalt ferrite (Ni-0/CoFe2O4), polydopamine coated cobalt ferrite (NP0/PDA-CoFe2O4) or silica coated cobalt ferrite (NP0/SiO2-CoFe2O4) are prepared and used as catalysts in hydrogen gen...

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