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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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Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
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.
Keywords:Solvothermal synthesis, Iron phosphide, Electrocatalyst, Hydrogen evolution, Overpotential
Year of publishing:2020
Number of pages:10
COBISS_ID:22969603 Link is opened in a new window
DOI: Link is opened in a new window
License:CC BY-NC-SA 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial Share Alike 4.0 International
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Record is a part of a journal

Title:International Journal of Hydrogen Energy
Year of publishing:2020

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Raziskovalni projekti - temeljni
Project no.:NI-0002
Name:A multidisciplinary approach to the treatment and application of waste water to agriculture
Project ID:info:eu-repo/grantAgreement/ARRS/Raziskovalni%20projekti%20-%20temeljni/NI-0002