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dc.contributor.authorSemiz, L.
dc.contributor.authorAbdullayeva, N.
dc.contributor.authorSankır, Mehmet
dc.date.accessioned2019-03-18T07:19:08Z
dc.date.available2019-03-18T07:19:08Z
dc.date.issued2018-05-05
dc.identifier.citationSemiz, L., Abdullayeva, N., & Sankir, M. (2018). Nanoporous Pt and Ru catalysts by chemical dealloying of Pt-Al and Ru-Al alloys for ultrafast hydrogen generation. Journal of Alloys and Compounds, 744, 110-115.
dc.identifier.urihttps://linkinghub.elsevier.com/retrieve/pii/S0925838818305231
dc.identifier.urihttp://hdl.handle.net/20.500.11851/732
dc.description.abstractNovel nanoporous catalysts from selective dissolution of alloys have been prepared for fast hydrogen generation from chemical hydrides. Pt and Ru have been used as precious metals in the alloys, while the nonprecious metal is Al. The alloy composition has been arranged by sputtering power of Al, which is varied from 200 to 400 W for Pt-Al and Ru-Al alloys. The influence of particle size on the sputtering power of Al has been demonstrated. The particle size of the Pt nanoparticle decreases from 900 to 90 nm when the sputtering power of Al is increased from 200 to 400 W. However, the particle size of the Ru nanoparticle decreased from 610 to 55 with the same increase in Al sputtering power. The hydrolysis reaction rate of NaBH4 scales with the sputtering power of Al and has been raised from 20 to 90 L min−1gcatalyst−1 for Pt while it increases from 23 to 110 L min−1gcatalyst−1 for Ru. The BET analysis has demonstrated that the measured surface areas of the Pt and Ru nanoparticles are approximately 55.5 and 151 m2 g−1, respectively. Joint like morphology providing the porous structure has been clearly concluded by TEM analysis. The average pore sizes are 1 and 10 nm for the Ru and Pt nanoparticles, respectively. In this study, fast hydrogen generation with lower activation energies of 31.7 and 32.1 kJ mol−1 has been achieved for the Pt and Ru nanoparticles, respectively. The critical parameters demonstrating the high catalytic activity in the hydrolysis reaction of NaBH4 are reported for the catalysts developed by the dealloying process.en_US
dc.language.isoeng
dc.publisherElsevier Ltd.
dc.relation.isversionof10.1016/j.jallcom.2018.02.082
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAlloyingen_US
dc.subjectDealloyingen_US
dc.subjectHydrogen generationen_US
dc.subjectPrecious metalsen_US
dc.subjectPlatinumen_US
dc.subjectRutheniumen_US
dc.titleNanoporous Pt and Ru catalysts by chemical dealloying of Pt-Al and Ru-Al alloys for ultrafast hydrogen generationen_US
dc.typearticle
dc.relation.journalJournal of Alloys and Compounds
dc.contributor.departmentTOBB ETU, Faculty of Engineering, Department of Material Science & Nanotechnology Engineeringen_US
dc.identifier.volume744
dc.identifier.startpage110
dc.identifier.endpage115
dc.relation.tubitak112M474
dc.identifier.wosWOS:000427513400015
dc.identifier.scopus2-s2.0-85041864958
dc.contributor.tobbetuauthorSankır, Mehmet
dc.contributor.YOKid143010
dc.identifier.doi10.1016/j.jallcom.2018.02.082
dc.contributor.ScopusAuthorID6506399777
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı


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