Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts
Proton exchange membrane water electrolysis (PEMWE) is a key technology for sustainable hydrogen production, yet long-term stability remains a challenge. This study evaluates degradation mechanisms in a 25 cm² catalyst-coated membrane electrolyzer cell using IrO₂/RuO₂ as anodic and Pt-based cathodic...
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| Kolejni autorzy: | , , , |
| Format: | article |
| Język: | angielski |
| Wydane: |
2026
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| Hasła przedmiotowe: | |
| Dostęp online: | https://hdl.handle.net/20.500.12381/5500 https://doi.org/10.1016/j.fuel.2025.137919 |
| Etykiety: |
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| _version_ | 1868890221958922240 |
|---|---|
| author | Tejera, G. |
| author2 | Teliz, E. Faccio, R. Fernández-Werner, L. Díaz, V. |
| author2_role | author author author author |
| author_browse | Díaz, V. Faccio, R. Fernández-Werner, L. Tejera, G. Teliz, E. |
| author_facet | Tejera, G. Teliz, E. Faccio, R. Fernández-Werner, L. Díaz, V. |
| author_role | author |
| collection | REDI |
| dc.creator.none.fl_str_mv | Tejera, G. Teliz, E. Faccio, R. Fernández-Werner, L. Díaz, V. |
| dc.date.none.fl_str_mv | 2026-04-22T19:21:36Z 2026-04-15 |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/20.500.12381/5500 PHV_X_2024_1_184611 https://doi.org/10.1016/j.fuel.2025.137919 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.relation.none.fl_str_mv | https://hdl.handle.net/20.500.12381/5307 https://hdl.handle.net/20.500.12381/5315 https://hdl.handle.net/20.500.12381/5318 https://hdl.handle.net/20.500.12381/5498 https://hdl.handle.net/20.500.12381/5499 https://hdl.handle.net/20.500.12381/5566 |
| dc.rights.none.fl_str_mv | Acceso embargado info:eu-repo/semantics/embargoedAccess Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional. (CC BY-NC-ND) 2028-04-15 2028-04-15 |
| dc.source.none.fl_str_mv | Fuel reponame:REDI instname:Agencia Nacional de Investigación e Innovación instacron:Agencia Nacional de Investigación e Innovación |
| dc.subject.none.fl_str_mv | EIS Membrane electrode assemblies Water PEM electrolyzer Green hydrogen Degradation Electrolysis Ingeniería y Tecnología Otras Ingenierías y Tecnologías |
| dc.title.none.fl_str_mv | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| dc.type.none.fl_str_mv | Artículo info:eu-repo/semantics/article Revisado info:eu-repo/semantics/updatedVersion |
| description | Proton exchange membrane water electrolysis (PEMWE) is a key technology for sustainable hydrogen production, yet long-term stability remains a challenge. This study evaluates degradation mechanisms in a 25 cm² catalyst-coated membrane electrolyzer cell using IrO₂/RuO₂ as anodic and Pt-based cathodic electrocatalysts, under both potentiostatic and galvanostatic conditions, and investigates the effect of acid-based regeneration. Under 2.0 V potentiostatic operation, current density declined steadily, particularly in the initial phase, stabilizing at ~204 µA/h·cm². Galvanostatic operation required ~50 mV more to maintain target current, indicating performance loss. Post-immersion in 1 M H₂SO₄, partial performance recovery was observed, but subsequent degradation accelerated to ~860 µA/h·cm², highlighting the regeneration’s limited durability. Electrochemical impedance spectroscopy (EIS) showed faradaic processes degrade earlier and more severely than mass transport, especially at 2.3 V. Increasing ohmic resistance indicated membrane dehydration and loss of interfacial integrity. No fluoride was detected, excluding chemical attack by oxidizing species. X-ray diffraction revealed peak broadening and cathodic Pt disorder, partially reversible upon regeneration. SEM-EDS analysis showed no new elements, suggesting structural reorganization. Loss of (Ru,Ir)O₂ phases at the anode post-regeneration indicated irreversible damage. These results confirm that degradation arises from both kinetic and structural factors, and that regeneration only temporarily mitigates performance losses |
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| format | article |
| id | anni_e91c390184ca2f03d74658945961cd65 |
| identifier_str_mv | PHV_X_2024_1_184611 |
| instacron_str | Agencia Nacional de Investigación e Innovación |
| institution | Agencia Nacional de Investigación e Innovación |
| instname_str | Agencia Nacional de Investigación e Innovación |
| language | eng |
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| oai_identifier_str | oai:redi.anii.org.uy:20.500.12381/5500 |
| publishDate | 2026 |
| publishDateSort | 2026 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | REDI |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
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| rights_invalid_str_mv | Acceso embargado Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional. (CC BY-NC-ND) 2028-04-15 |
| spelling | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide CatalystsTejera, G.Teliz, E.Faccio, R.Fernández-Werner, L.Díaz, V.EISMembrane electrode assembliesWater PEM electrolyzerGreen hydrogenDegradationElectrolysisIngeniería y TecnologíaOtras Ingenierías y TecnologíasProton exchange membrane water electrolysis (PEMWE) is a key technology for sustainable hydrogen production, yet long-term stability remains a challenge. This study evaluates degradation mechanisms in a 25 cm² catalyst-coated membrane electrolyzer cell using IrO₂/RuO₂ as anodic and Pt-based cathodic electrocatalysts, under both potentiostatic and galvanostatic conditions, and investigates the effect of acid-based regeneration. Under 2.0 V potentiostatic operation, current density declined steadily, particularly in the initial phase, stabilizing at ~204 µA/h·cm². Galvanostatic operation required ~50 mV more to maintain target current, indicating performance loss. Post-immersion in 1 M H₂SO₄, partial performance recovery was observed, but subsequent degradation accelerated to ~860 µA/h·cm², highlighting the regeneration’s limited durability. Electrochemical impedance spectroscopy (EIS) showed faradaic processes degrade earlier and more severely than mass transport, especially at 2.3 V. Increasing ohmic resistance indicated membrane dehydration and loss of interfacial integrity. No fluoride was detected, excluding chemical attack by oxidizing species. X-ray diffraction revealed peak broadening and cathodic Pt disorder, partially reversible upon regeneration. SEM-EDS analysis showed no new elements, suggesting structural reorganization. Loss of (Ru,Ir)O₂ phases at the anode post-regeneration indicated irreversible damage. These results confirm that degradation arises from both kinetic and structural factors, and that regeneration only temporarily mitigates performance lossesAgencia Nacional de Investigación e InnovaciónElsevier2026-04-22T19:21:36Z2026-04-15Artículoinfo:eu-repo/semantics/articleRevisadoinfo:eu-repo/semantics/updatedVersionhttps://hdl.handle.net/20.500.12381/5500PHV_X_2024_1_184611https://doi.org/10.1016/j.fuel.2025.137919Fuelreponame:REDIinstname:Agencia Nacional de Investigación e Innovacióninstacron:Agencia Nacional de Investigación e Innovaciónenghttps://hdl.handle.net/20.500.12381/5307https://hdl.handle.net/20.500.12381/5315https://hdl.handle.net/20.500.12381/5318https://hdl.handle.net/20.500.12381/5498https://hdl.handle.net/20.500.12381/5499https://hdl.handle.net/20.500.12381/5566Acceso embargadoinfo:eu-repo/semantics/embargoedAccessReconocimiento-NoComercial-SinObraDerivada 4.0 Internacional. (CC BY-NC-ND)2028-04-15Tras revisar las políticas de la revista, observamos que sólo puede subir esta versión con un embargo de 24 meses (https://openpolicyfinder.jisc.ac.uk/publication/16905).2028-04-15oai:redi.anii.org.uy:20.500.12381/55002026-06-16T05:03:32Z |
| spellingShingle | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts Tejera, G. EIS Membrane electrode assemblies Water PEM electrolyzer Green hydrogen Degradation Electrolysis Ingeniería y Tecnología Otras Ingenierías y Tecnologías |
| status_str | updatedVersion |
| title | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| title_full | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| title_fullStr | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| title_full_unstemmed | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| title_short | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| title_sort | Degradation Pathways in PEM Water Electrolyzers: Insights from Nafion N115 Membranes with Pt Black and Ir-Ru Oxide Catalysts |
| topic | EIS Membrane electrode assemblies Water PEM electrolyzer Green hydrogen Degradation Electrolysis Ingeniería y Tecnología Otras Ingenierías y Tecnologías |
| url | https://hdl.handle.net/20.500.12381/5500 https://doi.org/10.1016/j.fuel.2025.137919 |