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Title:Solvothermal synthesis of iron phosphides and their application for efficient electrocatalytic hydrogen evolution
Authors:Chouki, Takwa (Author)
Machreki, Manel (Author)
Emin, Saim (Author)
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Language:English
Work type:Unknown ()
Tipology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
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.
Keywords:solvothermal synthesis, iron phosphide, electrocatalyst, hydrogen evolution, overpotential
Year of publishing:2020
Number of pages:Str. 73
COBISS_ID:63148291 Link is opened in a new window
UDC:54
URN:URN:SI:UNG:REP:HA55R1JJ
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Record is a part of a monograph

Title:Zbornik povzetkov
Subtitle:Slovenski kemijski dnevi 2020
Publisher:Slovensko kemijsko društvo
ISBN:978-961-93849-7-8
COBISS.SI-ID:26241795 New window
Place of publishing:Ljubljana
Year of publishing:2020
Editors:Albin Pintar, Marjana Gantar Albreht, Romana Cerc Korošec, Darja Lisjak, Matic Lozinšek, Zorka Novak-Pintarič, Matjaž Valant, Silvo Zupančič

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