Nanoporous Pd-Cu-Si Amorphous Thin Films for Electrochemical Hydrogen Storage and Sensing

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dc.authoridSarac, Baran/0000-0002-0130-3914
dc.authoridSarac, A.Sezai/0000-0001-7513-1740
dc.contributor.authorSarac, Baran
dc.contributor.authorKarazehir, Tolga
dc.contributor.authorYuce, Eray
dc.contributor.authorMuehlbacher, Marlene
dc.contributor.authorSarac, A. Sezai
dc.contributor.authorEckert, Juergen
dc.date.accessioned2025-01-06T17:43:46Z
dc.date.available2025-01-06T17:43:46Z
dc.date.issued2021
dc.description.abstractIncreasing the efficiency of hydrogen storage and release using recent generation metallic glass nanofilms (MGNFs) offers green solutions for nanoscale energy applications. Contrary to flat nanofilms, enhanced electrochemical performance of Pd-Cu-Si MGNF assemblies for hydrogen interaction is obtained on different sizes and configurations of a nanoporous alumina support. In particular, 10 nm thick samples with pore diameters of 25 nm reach a high specific pseudocapacitance per unit mass of 637 F g(-1), which is more than an order of magnitude larger than for flat samples, surpassing the precious metal-based systems in the literature. The same electrode exhibits the highest double-layer capacitance calculated from the equivalent circuit model of the electrochemical impedance spectra, featuring its eligibility for hydrogen nanosensors. A rough and fully coated surface is attained for samples of 250 mu m thickness and above, while smoother and open-pore structures are observed for lower thicknesses, inducing a capillary pressure and turbulent flow effect for the latter case. The comparison of cyclic voltammetry (CV) profiles recorded in the region where hydrogen-metal interactions occur confirms a remarkable desorption charge difference, reaching 2.5 times higher values for the 50 nm thick 25 nm pore diameter than the 40 nm pore diameter and flat electrodes, and lower absolute impedance values near-DC range revealing their highly conductive behavior.
dc.description.sponsorshipEuropean Research Council under the Advanced Grant INTELHYB.Next generation of complex metallic materials in intelligent hybrid structures [ERC-2013-ADG-340025]; Ministry of Science and Higher Education of the Russian Federation of MISiS [K2-2020-046]
dc.description.sponsorshipThe authors thank C. Mitterer and V. Terziyska for providing the sputtering device for synthesizing the MGNFs and Atacan Asci for sample cleaning for SEM measurements. This work was supported by the European Research Council under the Advanced Grant INTELHYB.Next generation of complex metallic materials in intelligent hybrid structures (Grant ERC-2013-ADG-340025), and the Ministry of Science and Higher Education of the Russian Federation in the framework of the Increase Competitiveness Program of MISiS (support project for young research engineers, project no. K2-2020-046).
dc.identifier.doi10.1021/acsaem.0c03224
dc.identifier.endpage2680
dc.identifier.issn2574-0962
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85102459730
dc.identifier.scopusqualityQ1
dc.identifier.startpage2672
dc.identifier.urihttps://doi.org/10.1021/acsaem.0c03224
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2787
dc.identifier.volume4
dc.identifier.wosWOS:000636714000071
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.relation.ispartofAcs Applied Energy Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectnanoporous
dc.subjectthin films
dc.subjectelectrochemical hydrogen storage
dc.subjectscanning electron microscopy
dc.subjectPd-metallic glass
dc.subjectequivalent circuit model
dc.subjectpseudocapacitance
dc.subjecthydrogen sensing
dc.titleNanoporous Pd-Cu-Si Amorphous Thin Films for Electrochemical Hydrogen Storage and Sensing
dc.typeArticle

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