Enhancing Alkaline Hydrogen Evolution Reaction on Ru-Decorated TiO2 Nanotube Layers: Synergistic Role of Ti3+, Ru Single Atoms, and Ru Nanoparticles

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dc.contributor.authorThalluri, Sitaramanjaneya Moulics
dc.contributor.authorRodriguez Pereira, Jhonatancs
dc.contributor.authorMichalička, Jancs
dc.contributor.authorKolíbalová, Evacs
dc.contributor.authorHromádko, Luděkcs
dc.contributor.authorŠlang, Stanislavcs
dc.contributor.authorPouzar, Miloslavcs
dc.contributor.authorSopha, Hanna Ingridcs
dc.contributor.authorZazpe Mendioroz, Raúlcs
dc.contributor.authorMacák, Jancs
dc.coverage.issue3cs
dc.coverage.volume8cs
dc.date.accessioned2025-05-26T11:55:52Z
dc.date.available2025-05-26T11:55:52Z
dc.date.issued2025-05-01cs
dc.description.abstractSynergistic interplays involving multiple active centers originating from TiO2 nanotube layers (TNT) and ruthenium (Ru) species comprising of both single atoms (SAs) and nanoparticles (NPs) augment the alkaline hydrogen evolution reaction (HER) by enhancing Volmer kinetics from rapid water dissociation and improving Tafel kinetics from efficient H* desorption. Atomic layer deposition of Ru with 50 process cycles results in a mixture of Ru SAs and 2.8 +/- 0.4 nm NPs present on TNT layers, and it emerges with the highest HER activity among all the electrodes synthesized. A detailed study of the Ti and Ru species using different high-resolution techniques confirmed the presence of Ti3+ states and the coexistence of Ru SAs and NPs. With insights from literature, the role of Ti3+, appropriate work functions of TNT layers and Ru, and the synergistic effect of Ru SAs and Ru NPs in improving the performance of alkaline HER were elaborated and justified. The aforementioned characteristics led to a remarkable performance by having 9 mV onset potentials and 33 mV dec(-1) of Tafel slopes and a higher turnover frequency of 1.72 H-2 s(-1) at 30 mV. Besides, a notable stability from 28 h staircase chronopotentiometric measurements for TNT@Ru surpasses TNT@Pt in comparison.en
dc.formattextcs
dc.format.extent8cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationEnergy & Environmental Materials. 2025, vol. 8, issue 3, 8 p.en
dc.identifier.doi10.1002/eem2.12864cs
dc.identifier.issn2575-0356cs
dc.identifier.orcid0000-0001-6231-0061cs
dc.identifier.orcid0000-0002-8548-8185cs
dc.identifier.orcid0000-0001-7091-3022cs
dc.identifier.other197819cs
dc.identifier.scopus55655855500cs
dc.identifier.urihttps://hdl.handle.net/11012/251026
dc.language.isoencs
dc.publisherWileycs
dc.relation.ispartofEnergy & Environmental Materialscs
dc.relation.urihttps://onlinelibrary.wiley.com/doi/10.1002/eem2.12864cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2575-0356/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectalkaline hydrogen evolution reactionen
dc.subjectruthenium nanoparticlesen
dc.subjectruthenium single atomsen
dc.subjectTiO2 nanotube layersen
dc.subjectwater dissociationen
dc.titleEnhancing Alkaline Hydrogen Evolution Reaction on Ru-Decorated TiO2 Nanotube Layers: Synergistic Role of Ti3+, Ru Single Atoms, and Ru Nanoparticlesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-197819en
sync.item.dbtypeVAVen
sync.item.insts2025.05.26 13:55:52en
sync.item.modts2025.05.26 13:32:55en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé nízkodimenzionální nanomateriálycs
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