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Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction

Iron oxide thin films were grown directly on three‐dimensional nickel foam via metalorganic chemical vapor deposition (MOCVD) in the temperature range of 250–450 °C using Fe(CO)(5) as precursor. Iron oxide (α‐Fe(2)O(3)) films were formed at low substrate temperatures (250–350 °C), whereas the additi...

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Autores principales: Stienen, Christian, Bendt, Georg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7756718/
https://www.ncbi.nlm.nih.gov/pubmed/32926764
http://dx.doi.org/10.1002/cssc.202001896
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author Stienen, Christian
Bendt, Georg
author_facet Stienen, Christian
Bendt, Georg
author_sort Stienen, Christian
collection PubMed
description Iron oxide thin films were grown directly on three‐dimensional nickel foam via metalorganic chemical vapor deposition (MOCVD) in the temperature range of 250–450 °C using Fe(CO)(5) as precursor. Iron oxide (α‐Fe(2)O(3)) films were formed at low substrate temperatures (250–350 °C), whereas the additional growth of an underlying NiO film occurred at substrate temperatures above 350 °C. The electrochemical activities of the as‐formed binder‐free and noble metal‐free electrodes were tested for the oxygen evolution reaction (OER) in alkaline media. An overpotential reduced by 250 mV at a current density of 50 mA cm(−2) and a lower Tafel slope of 55 mV dec(−1) compared to bare nickel foam were found for the best‐performing electrocatalyst, while the long‐term stability of the as‐formed electrodes was proven by chronopotentiometry. The surface morphology of the iron oxide films was characterized by scanning electron microscopy, whereas the crystallographic phase as well as the elemental composition were determined by X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, X‐ray photoelectron spectroscopy, and time‐of‐flight secondary ion mass spectrometry in the pre‐ and the post‐catalytic state.
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spelling pubmed-77567182020-12-28 Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction Stienen, Christian Bendt, Georg ChemSusChem Full Papers Iron oxide thin films were grown directly on three‐dimensional nickel foam via metalorganic chemical vapor deposition (MOCVD) in the temperature range of 250–450 °C using Fe(CO)(5) as precursor. Iron oxide (α‐Fe(2)O(3)) films were formed at low substrate temperatures (250–350 °C), whereas the additional growth of an underlying NiO film occurred at substrate temperatures above 350 °C. The electrochemical activities of the as‐formed binder‐free and noble metal‐free electrodes were tested for the oxygen evolution reaction (OER) in alkaline media. An overpotential reduced by 250 mV at a current density of 50 mA cm(−2) and a lower Tafel slope of 55 mV dec(−1) compared to bare nickel foam were found for the best‐performing electrocatalyst, while the long‐term stability of the as‐formed electrodes was proven by chronopotentiometry. The surface morphology of the iron oxide films was characterized by scanning electron microscopy, whereas the crystallographic phase as well as the elemental composition were determined by X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, X‐ray photoelectron spectroscopy, and time‐of‐flight secondary ion mass spectrometry in the pre‐ and the post‐catalytic state. John Wiley and Sons Inc. 2020-09-30 2020-11-20 /pmc/articles/PMC7756718/ /pubmed/32926764 http://dx.doi.org/10.1002/cssc.202001896 Text en © 2020 The Authors. Published by Wiley-VCH GmbH This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Full Papers
Stienen, Christian
Bendt, Georg
Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title_full Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title_fullStr Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title_full_unstemmed Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title_short Direct MOCVD Growth of Iron Oxide on Three‐Dimensional Nickel Foam as Electrode for the Oxygen Evolution Reaction
title_sort direct mocvd growth of iron oxide on three‐dimensional nickel foam as electrode for the oxygen evolution reaction
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7756718/
https://www.ncbi.nlm.nih.gov/pubmed/32926764
http://dx.doi.org/10.1002/cssc.202001896
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