BH4 dissociation on various metal (111) surfaces: A DFT study

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dc.contributor.authorAkça, Aykan
dc.contributor.authorGenc, A. E.
dc.contributor.authorKutlu, B.
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-16T08:37:31Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-16T08:37:31Z
dc.date.issued2019
dc.department[Akca, A.] Aksaray Univ, Dept Phys, Adana Yolu Uzeri 7,Km 68100, Merkez Aksaray, Turkey -- [Genc, A. E. -- Kutlu, B.] Gazi Univ, Dept Phys, TR-06500 Ankara, Turkey
dc.description.abstractIn this study, the catalytic effect of various metal surfaces on the sequential decomposition of BH4 molecule has been studied by Density Functional Theory (DFT) for the first time. For this purpose, the sequential dissociation of BHx (x = 0 -> 4) molecules on Au, Cu, Al and Ag (1 1 1) surfaces were systematically investigated. At first, ground state structures of BHx (x = 0 -> 4) molecules and their decomposed versions such as BHx + yH (x + y = 4) were obtained. Then, transition state search calculations were performed to find activation barriers related to every BHx + yH (x + y = 4) decomposition step until x = 0 has been reached. An additional hydrogen atom(s) remaining from a previous step accepted as if they(it) are(is) at infinite distances from the central unit cell of the surface because it is prerequisite to form energy diagram which keeps the number of the atom(s) constant. Our calculations were supported with the lateral interaction energies and the various bond distances to clarify catalytic abilities of the surfaces. It is concluded that Au(1 1 1) surface is the most active surface among the others however the activity of the Cu(1 1 1) surface can compete with it. Al(1 1 1) and Ag(1 1 1) surfaces are the least active surfaces. This knowledge can be used to develop strategies to design Cu-based cheap and active catalyst for hydrogen generation from borohydride dissociation.
dc.identifier.doi10.1016/j.apsusc.2018.12.134
dc.identifier.endpage692en_US
dc.identifier.issn0169-4332
dc.identifier.issn1873-5584
dc.identifier.scopusqualityQ1
dc.identifier.startpage681en_US
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2018.12.134
dc.identifier.urihttps://hdl.handle.net/20.500.12451/3592
dc.identifier.volume473en_US
dc.identifier.wosWOS:000456951700088
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevıer Scıence Bv
dc.relation.ispartofApplıed Surface Scıence
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectBorohydride Decomposition
dc.subjectAu(111) Surface
dc.subjectAl(111) Surface
dc.subjectAg(111) Surface
dc.subjectCu(111) Surface
dc.subjectDFT Calculations
dc.titleBH4 dissociation on various metal (111) surfaces: A DFT study
dc.typeArticle

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