Efficient and highly transparent ultra-thin nickel-iron oxy-hydroxide catalyst for Oxygen evolution prepared by successive Ionic layer adsorption and reaction

Ivan Garcia-Torregrosa, Andrey Goryachev, Jan Philipp Hofmann, Emiel Hensen, Bert M. Weckhuysen (Corresponding author)

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NiFeOx thin films prepared by successive ionic layer adsorption and reaction (SILAR) were deposited onto nanostructured hematite (Fe2O3) photoanodes and their effect on the current density and photo‐onset potential was studied. After optimization of bath concentration, immersion times, and number of SILAR cycles, very conformal and active NiFeOx films with controlled Fe/Ni content ratios were obtained. Upon the incorporation of Fe2+ species in the NiCl2 solution bath, a cathodic shift in the overpotential required for the oxygen evolution reaction (OER) by more than 200 mV with no decrease in current density was observed after 40 SILAR cycles. We demonstrate that by fine‐tuning the film composition and thickness, NiFeOx can be employed as an efficient OER catalyst with very low absorbance in the visible spectrum. By doing so, we demonstrate that this material has great potential for incorporation in semiconductor photoelectrodes for direct solar‐driven water electrolysis. Being a simple water‐based layer‐by‐layer growth method, SILAR offers promise for the synthesis of catalyst coatings in nano‐structured and high surface area electrodes.
Originele taal-2Engels
Pagina's (van-tot)1050-1054
TijdschriftChemPhotoChem
Volume3
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - okt 2019

Vingerafdruk

Nickel
Iron
Oxygen
Adsorption
Catalysts
Current density
Electrolysis
Semiconductor materials
Thin films
Coatings
Electrodes
hydroxide ion
Water
Chemical analysis

Citeer dit

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title = "Efficient and highly transparent ultra-thin nickel-iron oxy-hydroxide catalyst for Oxygen evolution prepared by successive Ionic layer adsorption and reaction",
abstract = "NiFeOx thin films prepared by successive ionic layer adsorption and reaction (SILAR) were deposited onto nanostructured hematite (Fe2O3) photoanodes and their effect on the current density and photo‐onset potential was studied. After optimization of bath concentration, immersion times, and number of SILAR cycles, very conformal and active NiFeOx films with controlled Fe/Ni content ratios were obtained. Upon the incorporation of Fe2+ species in the NiCl2 solution bath, a cathodic shift in the overpotential required for the oxygen evolution reaction (OER) by more than 200 mV with no decrease in current density was observed after 40 SILAR cycles. We demonstrate that by fine‐tuning the film composition and thickness, NiFeOx can be employed as an efficient OER catalyst with very low absorbance in the visible spectrum. By doing so, we demonstrate that this material has great potential for incorporation in semiconductor photoelectrodes for direct solar‐driven water electrolysis. Being a simple water‐based layer‐by‐layer growth method, SILAR offers promise for the synthesis of catalyst coatings in nano‐structured and high surface area electrodes.",
keywords = "catalysis, nickel-iron oxide, oxygen evolution, photoelectrochemistry, water splitting",
author = "Ivan Garcia-Torregrosa and Andrey Goryachev and Hofmann, {Jan Philipp} and Emiel Hensen and Weckhuysen, {Bert M.}",
year = "2019",
month = "10",
doi = "10.1002/cptc.201900131",
language = "English",
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pages = "1050--1054",
journal = "ChemPhotoChem",
issn = "2367-0932",
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}

Efficient and highly transparent ultra-thin nickel-iron oxy-hydroxide catalyst for Oxygen evolution prepared by successive Ionic layer adsorption and reaction. / Garcia-Torregrosa, Ivan; Goryachev, Andrey; Hofmann, Jan Philipp; Hensen, Emiel; Weckhuysen, Bert M. (Corresponding author).

In: ChemPhotoChem, Vol. 3, Nr. 10, 10.2019, blz. 1050-1054.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Efficient and highly transparent ultra-thin nickel-iron oxy-hydroxide catalyst for Oxygen evolution prepared by successive Ionic layer adsorption and reaction

AU - Garcia-Torregrosa, Ivan

AU - Goryachev, Andrey

AU - Hofmann, Jan Philipp

AU - Hensen, Emiel

AU - Weckhuysen, Bert M.

PY - 2019/10

Y1 - 2019/10

N2 - NiFeOx thin films prepared by successive ionic layer adsorption and reaction (SILAR) were deposited onto nanostructured hematite (Fe2O3) photoanodes and their effect on the current density and photo‐onset potential was studied. After optimization of bath concentration, immersion times, and number of SILAR cycles, very conformal and active NiFeOx films with controlled Fe/Ni content ratios were obtained. Upon the incorporation of Fe2+ species in the NiCl2 solution bath, a cathodic shift in the overpotential required for the oxygen evolution reaction (OER) by more than 200 mV with no decrease in current density was observed after 40 SILAR cycles. We demonstrate that by fine‐tuning the film composition and thickness, NiFeOx can be employed as an efficient OER catalyst with very low absorbance in the visible spectrum. By doing so, we demonstrate that this material has great potential for incorporation in semiconductor photoelectrodes for direct solar‐driven water electrolysis. Being a simple water‐based layer‐by‐layer growth method, SILAR offers promise for the synthesis of catalyst coatings in nano‐structured and high surface area electrodes.

AB - NiFeOx thin films prepared by successive ionic layer adsorption and reaction (SILAR) were deposited onto nanostructured hematite (Fe2O3) photoanodes and their effect on the current density and photo‐onset potential was studied. After optimization of bath concentration, immersion times, and number of SILAR cycles, very conformal and active NiFeOx films with controlled Fe/Ni content ratios were obtained. Upon the incorporation of Fe2+ species in the NiCl2 solution bath, a cathodic shift in the overpotential required for the oxygen evolution reaction (OER) by more than 200 mV with no decrease in current density was observed after 40 SILAR cycles. We demonstrate that by fine‐tuning the film composition and thickness, NiFeOx can be employed as an efficient OER catalyst with very low absorbance in the visible spectrum. By doing so, we demonstrate that this material has great potential for incorporation in semiconductor photoelectrodes for direct solar‐driven water electrolysis. Being a simple water‐based layer‐by‐layer growth method, SILAR offers promise for the synthesis of catalyst coatings in nano‐structured and high surface area electrodes.

KW - catalysis

KW - nickel-iron oxide

KW - oxygen evolution

KW - photoelectrochemistry

KW - water splitting

U2 - 10.1002/cptc.201900131

DO - 10.1002/cptc.201900131

M3 - Article

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SP - 1050

EP - 1054

JO - ChemPhotoChem

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