1. Tungsten carbide electrocatalysts prepared from metallic tungsten nanoparticles for efficient hydrogen evolutionPlamen Stefanov, Abdullah Yildiz, Hasan Okuyucu, Saim Emin, Cesur Altinkaya, Ali Semerci, 2018, original scientific article Found in: ključnih besedah
Summary of found: ...Tungsten carbide, Colloid, Hydrogen evolution, Overpotential, Electrocatalyst...
Keywords: Tungsten carbide, Colloid, Hydrogen evolution, Overpotential, Electrocatalyst
Published: 23.05.2018; Views: 3866; Downloads: 0
 Fulltext (3,25 MB) |
2. Synthesis of tungsten carbide and platinum composite thin films for hydrogen production by electrochemical water splittingAli Semerci, 2018, master's thesis Found in: ključnih besedah
Summary of found: ...tungsten carbide, hydrogen evolution, overpotential, electro- catalyst, platinum composite...
Keywords: tungsten carbide, hydrogen evolution, overpotential, electro- catalyst, platinum composite
Published: 30.08.2018; Views: 3548; Downloads: 0
Fulltext (3,21 MB) |
3. Solvothermal synthesis of iron phosphides and their application for efficient electrocatalytic hydrogen evolutionSaim Emin, Takwa Chouki, Manel Machreki, 2020, original scientific article Abstract: Abstract
In this paper, we present a solvothermal synthesis of iron phosphide electrocatalysts using a triphenylphosphine (TPP) precursor. The synthetic protocol generates 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 under reductive atmosphere 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). Pure Fe2P films was prepared under argon atmosphere at 450 °C (Fe2P−450 °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 H2SO4. The HER activities of the iron phosphide catalyst were found to be phase dependent. The lowest electrode potential of 110 mV vs. a reversible hydrogen electrode (RHE) at 10 mA cm−2 was achieved with Fe2P/FeP−500 °C catalyst.
Found in: ključnih besedah
Keywords: Solvothermal synthesis, Iron phosphide, Electrocatalyst, Hydrogen evolution, Overpotential
Published: 20.07.2020; Views: 1845; Downloads: 0
Fulltext (2,52 MB) |
4. Solvothermal synthesis of iron phosphides and their application for efficient electrocatalytic hydrogen evolutionSaim Emin, Manel Machreki, Takwa Chouki, 2020, published scientific conference contribution abstract Abstract: We report the solvothermal synthesis of iron phosphide electrocatalysts using a low-cost phosphorus precursor [1]. 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 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 present approach allows the 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.
Found in: ključnih besedah
Summary of found: ...to be phase dependent. The lowest recorded overpotential of 110 mV at 10 mA cm−2...
Keywords: solvothermal synthesis, iron phosphide, electrocatalyst, hydrogen evolution, overpotential
Published: 13.05.2021; Views: 1368; Downloads: 0
Fulltext (4,08 MB) |
