| Title: | Solvothermal synthesis of iron phosphides and their application for efficient electrocatalytic hydrogen evolution |
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| Authors: | ID Chouki, Takwa, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270, Ajdovščina, Slovenia (Author)
ID Machreki, Manel, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270, Ajdovščina, Slovenia (Author)
ID Emin, Saim, Materials Research Laboratory, University of Nova Gorica, Vipavska 11c, 5270, Ajdovščina, Slovenia (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| 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. |
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| Keywords: | Solvothermal synthesis, Iron phosphide, Electrocatalyst, Hydrogen evolution, Overpotential |
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| Year of publishing: | 2020 |
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| Number of pages: | 10 |
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| Numbering: | 38 |
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| PID: | 20.500.12556/RUNG-5648 |
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| COBISS.SI-ID: | 22969603 |
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| DOI: | https://doi.org/10.1016/j.ijhydene.2020.05.257 |
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| NUK URN: | URN:SI:UNG:REP:HA6M4RPU |
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| Publication date in RUNG: | 20.07.2020 |
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| Views: | 3851 |
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| Downloads: | 0 |
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