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92. Iron phosphide thin films for electrocatalytic H2 generation and water remediation studiesSaim Emin, Aaron Fait, Matjaz Valant, Jack S Summers, Erika Jez, Plamen Stefanov, Lorena Butinar, Jelena Topic, Takwa Chouki, Manel Machreki, 2022, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: Iron phosphide thin films
H2 generation
water remediation
Objavljeno: 10.02.2023; Ogledov: 135; Prenosov: 0
 Polno besedilo (755,86 KB) |
93. Reduced TiO2 nanotube arrays for photoelectrochemical degradation of pharmaceuticalSaim Emin, Alexandre Loukanov, Plamen Stefanov, Dušan Žigon, Bunsho Ohtani, Manel Machreki, Takwa Chouki, Georgi Tyuliev, 2022, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: TiO2, nanotube arrays, photoelectrochemical degradation, pharmaceuticals
Objavljeno: 10.02.2023; Ogledov: 132; Prenosov: 0
Polno besedilo (4,79 MB) |
94. Salicylaldehydate coordinated two-dimensional-conjugated metal–organic frameworksDinesh Shetty, Felipe Gandara, Sreekumar Kurungot, Kyriaki Polychronopoulou, Tina Skorjanc, Ayesha A. AlKhoori, Safa Gaber, Ajmal Pandikassala, Pilar Pena-Sanchez, Abdul Khayum Mohammed, 2023, izvirni znanstveni članek Ključne besede: metal-organic framework, 2D materials, salicylaldehyde, thin films, mechanochemistry
Objavljeno: 10.02.2023; Ogledov: 128; Prenosov: 0
Polno besedilo (1,01 MB) |
95. Limits to Gauge Coupling in the Dark Sector Set by the Nonobservation of Instanton-Induced Decay of Super-Heavy Dark Matter in the Pierre Auger Observatory DataLukas Zehrer, marko zavrtanik, danilo zavrtanik, Serguei Vorobiov, Samo Stanič, Jon Paul Lundquist, Andrej Filipčič, P. Abreu, 2023, izvirni znanstveni članek Ključne besede: ultra-high energy (UHE) cosmic rays, Pierre Auger Observatory, UHE photon flux upper limits, super-heavy dark matter models, instantons
Objavljeno: 09.02.2023; Ogledov: 133; Prenosov: 0
Polno besedilo (335,85 KB) |
96. Cosmological implications of photon-flux upper limits at ultrahigh energies in scenarios of Planckian-interacting massive particles for dark mattermarko zavrtanik, Lukas Zehrer, danilo zavrtanik, Serguei Vorobiov, Samo Stanič, Jon Paul Lundquist, Andrej Filipčič, P. Abreu, 2023, izvirni znanstveni članek Ključne besede: ultra-high energy (UHE) cosmic rays, Pierre Auger Observatory, UHE photon flux upper limits, super-heavy dark matter models
Objavljeno: 09.02.2023; Ogledov: 121; Prenosov: 0
Polno besedilo (823,80 KB) |
97. A Catalog of the Highest-energy Cosmic Rays Recorded during Phase I of Operation of the Pierre Auger Observatorymarko zavrtanik, danilo zavrtanik, Serguei Vorobiov, Samo Stanič, Shima Ujjani Shivashankara, Jon Paul Lundquist, Andrej Filipčič, A. Abdul Halim, 2023, izvirni znanstveni članek Opis: A catalog containing details of the highest-energy cosmic rays recorded through the detection of extensive air
showers at the Pierre Auger Observatory is presented with the aim of opening the data to detailed examination.
Descriptions of the 100 showers created by the highest-energy particles recorded between 2004 January 1 and 2020
December 31 are given for cosmic rays that have energies in the range 78–166 EeV. Details are also given on a
further nine very energetic events that have been used in the calibration procedure adopted to determine the energy
of each primary. A sky plot of the arrival directions of the most energetic particles is shown. No interpretations of
the data are offered.
Ključne besede: ultra-high-energy cosmic rays, cosmic ray air showers, experimental data, catalogs, Pierre Auger Observatory
Objavljeno: 09.02.2023; Ogledov: 113; Prenosov: 5
Polno besedilo (8,87 MB) |
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99. Iron phosphide as an efficient electrocatalysts for hydrogen evolutionSaim Emin, Manel Machreki, Takwa Chouki, 2020, objavljeni povzetek znanstvenega prispevka na konferenci Opis: We report the solvothermal synthesis of iron phosphide electrocatalysts using a low-cost phosphorus precursor. The synthetic protocol allows for the preparation of a Fe2P phase at 300°C and FeP phase at 350°C. To enhance the catalytic activities of obtained iron phosphide particles, heat-treatments were carried out at elevated temperatures. Annealing at 500°C induced structural changes in the samples: (i) Fe2P provided a pure Fe3P phase (Fe3P−500°C) and (ii) FeP transformed into a mixture of iron phosphide phases (Fe2P/FeP−500°C). The electrocatalytic activities of heat-treated Fe2P−450°C, Fe3P−500°C, and Fe2P/FeP−500°C catalysts were studied for hydrogen evolution reaction (HER) in 0.5 M sulfuric acid (H2SO4). The lowest recorded overpotential of 110 mV at 10 mA cm−2 vs. a reversible hydrogen electrode was achieved with Fe2P/FeP−500°C catalyst. The present approach allows preparation of immobilized iron phsphide catalyst onto carbon support which is essential for application purpose. The procedure developed by us is an elegant approach to tune the composition of iron phosphide catalyst and control the morphology of particles
Ključne besede: solvothermal synthesis
iron phosphide
electrocatalysis
HER
Objavljeno: 06.02.2023; Ogledov: 130; Prenosov: 0
Polno besedilo (2,67 MB) |
100. Iron phosphides as efficient electrocatalyst for hydrogen evolution and energy conversionTakwa Chouki, Saim Emin, 2021, objavljeni povzetek znanstvenega prispevka na konferenci Opis: Transition metal phosphides have been demonstrated as outstanding multifunctional catalysts in a broad range of energy conversion technologies. We developed a solvothermal synthesis approach for iron phosphide electrocatalystsusing a low-cost phosphorus precursor.The synthetic protocol allows for the preparation of a Fe2P phase at 300°C and FeP phase at 350°C. The obtained compounds were coated on conductive substrates to prepare catalysts thin films. Here, we exploited different phases of iron phosphide as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) with an I−/I3− based electrolyte [2]. The solar-to-current conversion efficiency of the solar cells assembled with the Fe2P material reached 3.96±0.06%,which is comparable to the device assembled with a platinum (Pt) CE. In addition to DSSC
applications, the iron phosphides were used as electrocatalyst for H2 evolution (Fig. 1). To enhance the catalytic activities of obtained iron phosphide particles, heat-treatments were carried out at elevated temperatures.Annealing at 500°C induced structural changes in the samples: (i) Fe2P provided a pure Fe3P phase (Fe3P−500°C) and (ii) FeP transformed into a mixture of iron phosphide phases (Fe2P/FeP−500°C). The electrocatalytic activities for H2 evolution of heat-treated catalysts were studied in 0.5 M sulfuric acid (H2SO4). The HER activities of the iron phosphide catalyst were found to be phase dependent. The lowest recorded overpotential of 110 mV at 10 mA cm−2 vs. a reversible hydrogen electrode was achieved with Fe2P/FeP−500°C catalyst. The developed procedure is an elegant approach to tune the composition of iron phosphide catalyst and control the morphology of particles.
Ključne besede: Iron phosphides
electrocatalyst
hydrogen evolution
energy conversion
Objavljeno: 06.02.2023; Ogledov: 130; Prenosov: 0
Polno besedilo (649,13 KB)
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