{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T03:57:01Z","timestamp":1790395021120,"version":"4.1.0"},"reference-count":31,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,6,16]],"date-time":"2020-06-16T00:00:00Z","timestamp":1592265600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Membranes"],"abstract":"<jats:p>It is generally understood that the hydrogen permeability of Pd-Ag alloy membranes declines with decreasing temperature. However, recent studies have revealed that the hydrogen permeability of Pd-Ag alloy membranes inversely increases at a certain temperature range and reaches a peak. The peak behavior reflects the shape of pressure-composition isotherms (PCT curves). In order to elucidate the relationship between the reverse temperature dependence of hydrogen permeability and the PCT curves, the hydrogen permeability of pure Pd and Pd-X (X = Ho, Y, and Ni) alloy membranes were investigated. The pure Pd and Pd-5 mol%Ni alloy membranes, in which the \u03b1-\u03b1\u2019 phase transition occurs, exhibits more significant peak behaviors than Pd-5 mol%Ho, Pd-5 mol%Y, and Pd-23 mol%Ag alloy membranes, in which the \u03b1-\u03b1\u2019 phase transition is suppressed. Large differences in hydrogen solubility, at the hydrogen pressures above and below the plateau region or the inflection point, make the peak behaviors more significant. It is revealed that the peak temperature can be roughly predicted by the hydrogen pressure at the plateau regions or the inflection points in the PCT curves.<\/jats:p>","DOI":"10.3390\/membranes10060123","type":"journal-article","created":{"date-parts":[[2020,6,16]],"date-time":"2020-06-16T13:20:43Z","timestamp":1592313643000},"page":"123","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Analysis for Reverse Temperature Dependence of Hydrogen Permeability through Pd-X (X = Y, Ho, Ni) Alloy Membranes Based on Hydrogen Chemical Potential"],"prefix":"10.3390","volume":"10","author":[{"given":"Asuka","family":"Suzuki","sequence":"first","affiliation":[{"name":"Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Yukawa","sequence":"additional","affiliation":[{"name":"Department of Materials Design Innovation Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1465","DOI":"10.1016\/j.scitotenv.2018.09.089","article-title":"Robust eco-efficiency assessment of hydrogen from biomass gasification as an alternative to conventional hydrogen: A life-cycle study with and without external costs","volume":"650","author":"Valente","year":"2019","journal-title":"Sci. Total Environ."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2098","DOI":"10.1021\/ef0500538","article-title":"Current Status of Hydrogen Production Techniques by Steam Reforming of Ethanol: A Review","volume":"19","author":"Haryanto","year":"2005","journal-title":"Energy Fuels"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"4962","DOI":"10.1016\/j.ijhydene.2009.08.067","article-title":"Challenges for renewable hydrogen production from biomass","volume":"35","author":"Levin","year":"2010","journal-title":"Int. J. Hydrog. Energy"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"4901","DOI":"10.1016\/j.ijhydene.2013.01.151","article-title":"A comprehensive review on PEM water electrosis","volume":"38","author":"Carmo","year":"2013","journal-title":"Int. J. Hydrog. Energy"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"739","DOI":"10.1016\/j.jpowsour.2006.12.012","article-title":"A review of PEM hydrogen fuel cell contamination: Impacts, mechanisms, and mitigation","volume":"165","author":"Cheng","year":"2007","journal-title":"J. Power Sources"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1595\/003214077X2124450","article-title":"Palladium Alloys for Hydrogen Diffusion Membranes a Review of High Permeability Materials","volume":"21","author":"Knapton","year":"1977","journal-title":"Platin. Metals Rev."},{"key":"ref_7","first-page":"1023","article-title":"Hydrogen and deuterium in Pd-25 pct Ag alloy: Permeation, diffusion, solubilization, and surface reaction","volume":"29","author":"Serra","year":"1998","journal-title":"Metall. Mater. Sci. A"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1252\/jcej.17we128","article-title":"Improvement in hydrogen permeability of palladium membrane by alloying with transition metals","volume":"51","author":"Shirasaki","year":"2018","journal-title":"J. Chem. Eng. Jpn."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/0925-8388(92)90468-O","article-title":"Permeability and diffusivity of hydrogen in palladium-rich Pd-Y(Gd)-Ag ternary alloys","volume":"185","author":"Sakamoto","year":"1992","journal-title":"J. Alloys Compd."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"631","DOI":"10.1016\/j.memsci.2016.11.066","article-title":"Combinatorial screening of Pd-Ag-Ni membranes for hydrogen separation","volume":"524","author":"Piskin","year":"2017","journal-title":"J. Membr. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1007\/BF02667685","article-title":"The H-Pd (hydrogen-palladium) System","volume":"15","author":"Manchester","year":"1994","journal-title":"J. Phase. Equilibria"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1524\/zpch.1965.44.3_4.143","article-title":"Wasserstoff in Palladium\/Silber-Legierungen","volume":"44","author":"Brodowsky","year":"1965","journal-title":"Z. Phys. Chem. NF"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"317","DOI":"10.1002\/pssb.2220490130","article-title":"Hydrogen in palladium\u2013silver in the neighbourhood of the critical point","volume":"49","author":"Buck","year":"1972","journal-title":"Phys. Status Solidi B"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/0022-5088(76)90024-2","article-title":"Studies of anelasticity in the palladium-silver-hydrogen system","volume":"49","author":"Nuovo","year":"1976","journal-title":"J. Less Common Met."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"L258","DOI":"10.1088\/0305-4608\/3\/12\/003","article-title":"Variations of elastic moduli and internal friction in relation to phase transformations in the palladium-silver-hydrogen system","volume":"3","author":"Mazzolai","year":"1973","journal-title":"J. Phys. F Met. Phys."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"982","DOI":"10.1088\/0305-4608\/2\/5\/024","article-title":"The iron-palladium-hydrogen alloy system (Mossbauer studies)","volume":"2","author":"Carlow","year":"1972","journal-title":"J. Phys. F Met. Phys."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/0022-5088(82)90021-2","article-title":"X-ray investigation of the absorption of hydrogen by several palladium and nickel solid solutions","volume":"88","author":"Sakamoto","year":"1982","journal-title":"J. Less Common Met."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"695","DOI":"10.2320\/matertrans.M2016020","article-title":"Anomalous Temperature Dependence of Hydrogen Permeability through Palladium\u2013Silver Binary Alloy Membrane and Its Analysis Based on Hydrogen Chemical Potential","volume":"57","author":"Suzuki","year":"2016","journal-title":"Mater. Trans."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"7919","DOI":"10.1016\/j.ijhydene.2014.03.123","article-title":"Consistent description of hydrogen permeability through metal membrane based on hydrogen chemical potential","volume":"39","author":"Suzuki","year":"2014","journal-title":"Int. J. Hydrog. Energy"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"246","DOI":"10.1007\/BF02645726","article-title":"Ho-Pd (Holmium-Palladium)","volume":"12","author":"Okamoto","year":"1991","journal-title":"J. Phase Equilibria"},{"key":"ref_21","first-page":"3065","article-title":"Pd-Y (Palladium-Yttrium)","volume":"3","author":"Okamoto","year":"1990","journal-title":"Bin. Alloy Phase Diagr. II Ed. Ed. T.B. Massalski"},{"key":"ref_22","first-page":"2839","article-title":"Ni-Pd (Nickel-Palladium)","volume":"3","author":"Nash","year":"1990","journal-title":"Bin. Alloy Phase Diagr. II Ed. Ed. T.B. Massalski"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"96","DOI":"10.1016\/j.memsci.2007.09.024","article-title":"Hydrogen permeation of thin, free-standing Pd\/Ag23% membranes before and after heat treatment in air","volume":"307","author":"Mejdell","year":"2008","journal-title":"J. Membr. Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"841","DOI":"10.2320\/jinstmet.69.841","article-title":"Hydrogen Permeation of Pure Niobium Metal in Highly Soluble Hydrogen State","volume":"69","author":"Nambu","year":"2005","journal-title":"J. Japan Inst. Met."},{"key":"ref_25","unstructured":"L\u00e4sser, R., Meuffles, P., and Feenstra, R. (1988). Datenbank der L\u00f6slichkeiten der Wasser-stoffisotope Protium (H), Deuterium (D) and Tritium (T) in den Metallen V, Nb, Ta, Pd, und den Legierungen V1-xNbx, V1-xTax, Nb1-xMox, Pd1-xAgx, Kernforschungsanlage J\u00fclich GmbH. KFA-J\u00fclich Report (J\u00fcl-2183)."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1016\/0022-5088(89)90226-9","article-title":"X-ray investigations of the \u03b1-\u03b2 miscibility gaps in hydrogenated palladium-rare earth alloys","volume":"155","author":"Chen","year":"1989","journal-title":"J. Less Common Met."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1016\/j.memsci.2006.05.042","article-title":"Hydrogen permeability study of the thin Pd-Ag alloy membranes in the temperature range across the \u03b1-\u03b2 phase transition","volume":"282","author":"Okazaki","year":"2006","journal-title":"J. Membr. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Fukai, Y. (1993). The Metal-Hydrogen System, Springer.","DOI":"10.1007\/978-3-662-02801-8"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Teatum, E.T., Gschneidner, K.A., and Waber, J.T. (1968). Compilation of Calculated Data Useful in Predicting Metallurgical Behavior of the Elements in Binary Alloy Systems, Los Alamos Scientific Laboratory of the University of California.","DOI":"10.2172\/4789465"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"014102","DOI":"10.1103\/PhysRevB.97.014102","article-title":"Mechanism of fast lattice diffusion of hydrogen in palladium: Interplay of quantum fluctuations and lattice strain","volume":"97","author":"Kimizuka","year":"2018","journal-title":"Phys. Rev. B"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1640","DOI":"10.1103\/PhysRevLett.73.1640","article-title":"Formation of superabundant vacancies in Pd hydride under high hydrogen pressures","volume":"73","author":"Fukai","year":"1994","journal-title":"Phys. Rev. Lett."}],"container-title":["Membranes"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0375\/10\/6\/123\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:39:37Z","timestamp":1760175577000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0375\/10\/6\/123"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,6,16]]},"references-count":31,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2020,6]]}},"alternative-id":["membranes10060123"],"URL":"https:\/\/doi.org\/10.3390\/membranes10060123","relation":{},"ISSN":["2077-0375"],"issn-type":[{"value":"2077-0375","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,6,16]]}}}