Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method

This manuscript reports on a Ni/Fe-based bilayer catalyst developed to boost the oxygen evolution reaction in anion exchange membrane water electrolyzers. The electrochemical behavior toward the oxygen evolution reaction of several NiFe/NiFeO metal−oxide bilayer catalysts, prepared by magnetron sput...

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Authors: Luque-Centeno, José Manuel, Carmo-Delcán, Álvaro, Martínez-Olaizola, Mikel, Gómez-Sacedón, Celia, Lucas-Consuegra, Antonio de, González-Elipe, Agustín R., Yubero, Francisco, Brey Sánchez, José Javier
Format: article
Publication Date:2025
Country:España
Institution:Universidad Loyola Andalucía
Repository:Brújula
OAI Identifier:oai:repositorio.uloyola.es:20.500.12412/7078
Online Access:https://hdl.handle.net/20.500.12412/7078
Access Level:Open access
Keyword:Bilayer electrocatalysts
Magnetron sputtering
NiFe catalysts
Anion exchange membrane water electrolysis
Oxygen evolution reaction
Layered double hydroxide
Hydrogen
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spelling Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition MethodLuque-Centeno, José ManuelCarmo-Delcán, ÁlvaroMartínez-Olaizola, MikelGómez-Sacedón, CeliaLucas-Consuegra, Antonio deGonzález-Elipe, Agustín R.Yubero, FranciscoBrey Sánchez, José JavierGómez-Sacedón, CeliaBilayer electrocatalystsMagnetron sputteringNiFe catalystsAnion exchange membrane water electrolysisOxygen evolution reactionLayered double hydroxideHydrogenThis manuscript reports on a Ni/Fe-based bilayer catalyst developed to boost the oxygen evolution reaction in anion exchange membrane water electrolyzers. The electrochemical behavior toward the oxygen evolution reaction of several NiFe/NiFeO metal−oxide bilayer catalysts, prepared by magnetron sputtering at oblique angle deposition (MS-OAD) on a flat stainless-steel substrate, was assessed in a three electrode electrochemical cell in comparison with the behavior of both a metal NiFe and an oxide NiFeOx single-layer catalyst. The morphology and chemical nature of these catalysts, as prepared and after electro chemical usage, were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. A thorough electrochemical character ization of the different catalyst formulations revealed a higher efficiency for the bilayer catalysts, in terms of both activity and long-term stability, and provided some clues to account for this superior performance in terms of morphology and surface reactivity of each catalyst. As a proof of concept, the best-performing bilayer configuration was then deposited onto a stainless steel felt porous transport layer (PTL) substrate and tested as an ionomer-free anode electrode in a membrane electrode assembly (MEA). Results revealed that the MS-OAD catalysts performed well when deposited on PTLs and that, under this configuration, a bilayer catalyst anode is slightly more efficient than the NiFe single-layer catalyst. Additionally, the possibility of scaling up the MS-OAD procedure to large areas has been demonstrated by the preparation of the bilayer catalysts on a 64 cm2 PTL and its successful integration and operation in a large prototype single cell.2025info:eu-repo/semantics/articlehttps://hdl.handle.net/20.500.12412/7078reponame:Brújulainstname:Universidad Loyola AndalucíaInglésThe authors acknowledge the financial support of H2B2 Electrolysis Technologies S.L. through the Tecnopropia project, funded by the European Commission within the framework of the IPCEI Hy2Tech (European Next Generation funds, mobilized through the Recovery, Transformation, and Resilience Plan) and of CSIC through an Intramural Project (202260E100).http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:repositorio.uloyola.es:20.500.12412/70782026-06-24T12:48:37Z
dc.title.none.fl_str_mv Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
title Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
spellingShingle Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
Luque-Centeno, José Manuel
Bilayer electrocatalysts
Magnetron sputtering
NiFe catalysts
Anion exchange membrane water electrolysis
Oxygen evolution reaction
Layered double hydroxide
Hydrogen
title_short Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
title_full Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
title_fullStr Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
title_full_unstemmed Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
title_sort Ionomer-Free NiFe/NiFeO Bilayer Oxygen Evolution Reaction Electrocatalyst Prepared by a Magnetron Sputtering at Oblique Angle Bottom-Up Deposition Method
dc.creator.none.fl_str_mv Luque-Centeno, José Manuel
Carmo-Delcán, Álvaro
Martínez-Olaizola, Mikel
Gómez-Sacedón, Celia
Lucas-Consuegra, Antonio de
González-Elipe, Agustín R.
Yubero, Francisco
Brey Sánchez, José Javier
Gómez-Sacedón, Celia
author Luque-Centeno, José Manuel
author_facet Luque-Centeno, José Manuel
Carmo-Delcán, Álvaro
Martínez-Olaizola, Mikel
Gómez-Sacedón, Celia
Lucas-Consuegra, Antonio de
González-Elipe, Agustín R.
Yubero, Francisco
Brey Sánchez, José Javier
author_role author
author2 Carmo-Delcán, Álvaro
Martínez-Olaizola, Mikel
Gómez-Sacedón, Celia
Lucas-Consuegra, Antonio de
González-Elipe, Agustín R.
Yubero, Francisco
Brey Sánchez, José Javier
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Bilayer electrocatalysts
Magnetron sputtering
NiFe catalysts
Anion exchange membrane water electrolysis
Oxygen evolution reaction
Layered double hydroxide
Hydrogen
topic Bilayer electrocatalysts
Magnetron sputtering
NiFe catalysts
Anion exchange membrane water electrolysis
Oxygen evolution reaction
Layered double hydroxide
Hydrogen
description This manuscript reports on a Ni/Fe-based bilayer catalyst developed to boost the oxygen evolution reaction in anion exchange membrane water electrolyzers. The electrochemical behavior toward the oxygen evolution reaction of several NiFe/NiFeO metal−oxide bilayer catalysts, prepared by magnetron sputtering at oblique angle deposition (MS-OAD) on a flat stainless-steel substrate, was assessed in a three electrode electrochemical cell in comparison with the behavior of both a metal NiFe and an oxide NiFeOx single-layer catalyst. The morphology and chemical nature of these catalysts, as prepared and after electro chemical usage, were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. A thorough electrochemical character ization of the different catalyst formulations revealed a higher efficiency for the bilayer catalysts, in terms of both activity and long-term stability, and provided some clues to account for this superior performance in terms of morphology and surface reactivity of each catalyst. As a proof of concept, the best-performing bilayer configuration was then deposited onto a stainless steel felt porous transport layer (PTL) substrate and tested as an ionomer-free anode electrode in a membrane electrode assembly (MEA). Results revealed that the MS-OAD catalysts performed well when deposited on PTLs and that, under this configuration, a bilayer catalyst anode is slightly more efficient than the NiFe single-layer catalyst. Additionally, the possibility of scaling up the MS-OAD procedure to large areas has been demonstrated by the preparation of the bilayer catalysts on a 64 cm2 PTL and its successful integration and operation in a large prototype single cell.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.12412/7078
url https://hdl.handle.net/20.500.12412/7078
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv The authors acknowledge the financial support of H2B2 Electrolysis Technologies S.L. through the Tecnopropia project, funded by the European Commission within the framework of the IPCEI Hy2Tech (European Next Generation funds, mobilized through the Recovery, Transformation, and Resilience Plan) and of CSIC through an Intramural Project (202260E100).
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Brújula
instname:Universidad Loyola Andalucía
instname_str Universidad Loyola Andalucía
reponame_str Brújula
collection Brújula
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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