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Title:Iron phosphides as efficient electrocatalyst for hydrogen evolution and energy conversion : abstract
Authors:ID Emin, Saim, Materials Research Laboratory, University of Nova Gorica, Ajdovscina 5270, Slovenia (Author)
ID Chouki, Takwa, Materials Research Laboratory, University of Nova Gorica, Ajdovscina 5270, Slovenia (Author)
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Language:English
Work type:Not categorized
Typology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
Abstract: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.
Keywords:Iron phosphides electrocatalyst hydrogen evolution energy conversion
Year of publishing:2021
PID:20.500.12556/RUNG-7913 New window
COBISS.SI-ID:140834819 New window
NUK URN:URN:SI:UNG:REP:5PGKGUSW
Publication date in RUNG:06.02.2023
Views:2385
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EMIN, Saim and CHOUKI, Takwa, 2021, Iron phosphides as efficient electrocatalyst for hydrogen evolution and energy conversion : abstract. In : Iron phosphides as efficient electrocatalyst for hydrogen evolution and energy conversion [online]. Published Scientific Conference Contribution Abstract. Osaka, Japan. 2021. [Accessed 14 April 2025]. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=7913
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Record is a part of a monograph

Title:Iron phosphides as efficient electrocatalyst for hydrogen evolution and energy conversion
Place of publishing:Osaka, Japan
Year of publishing:2021
Conference organizer:the 4th International Symposium on Hydrogen Energy and Energy Technologies

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