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  • Neumüller, DanielaDepartment of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria,Montan Univ Leoben, Dept Mat Sci, A-8700 Leoben, Austria. (author)

Hydrogen Evolution Reaction on Ultra-Smooth Sputtered Nanocrystalline Ni Thin Films in Alkaline Media-From Intrinsic Activity to the Effects of Surface Oxidation

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • MDPI,2023
  • electronicrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:ltu-99588
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-99588URI
  • https://doi.org/10.3390/nano13142085DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-334335URI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Validerad;2023;Nivå 2;2023-09-26 (hanlid);Funder: Montanuniversität Leoben; Science Fund of the Republic of Serbia (PROMIS project Ratio-CAT); Ministry of Science, Technological Development; Innovations of the Republic of Serbia (451-03-47/2023-01/200146); Austrian Science Fund (FWF) (Y1236-N37)
  • QC 20230818
  • Highly effective yet affordable non-noble metal catalysts are a key component for advances in hydrogen generation via electrolysis. The synthesis of catalytic heterostructures containing established Ni in combination with surface NiO, Ni(OH)(2), and NiOOH domains gives rise to a synergistic effect between the surface components and is highly beneficial for water splitting and the hydrogen evolution reaction (HER). Herein, the intrinsic catalytic activity of pure Ni and the effect of partial electrochemical oxidation of ultra-smooth magnetron sputter-deposited Ni surfaces are analyzed by combining electrochemical measurements with transmission electron microscopy, selected area electron diffraction, X-ray photoelectron spectroscopy, and atomic force microscopy. The experimental investigations are supplemented by Density Functional Theory and Kinetic Monte Carlo simulations. Kinetic parameters for the HER are evaluated while surface roughening is carefully monitored during different Ni film treatment and operation stages. Surface oxidation results in the dominant formation of Ni(OH)(2), practically negligible surface roughening, and 3-5 times increased HER exchange current densities. Higher levels of surface roughening are observed during prolonged cycling to deep negative potentials, while surface oxidation slows down the HER activity losses compared to as-deposited films. Thus, surface oxidation increases the intrinsic HER activity of nickel and is also a viable strategy to improve catalyst durability.

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  • Rafailović, Lidija D.Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria,Montan Univ Leoben, Dept Mat Sci, A-8700 Leoben, Austria. (author)
  • Jovanović, Aleksandar Z.University of Belgrade-Faculty of Physical Chemistry, 11158 Belgrade, Serbia,Univ Belgrade, Fac Phys Chem, Belgrade 11158, Serbia. (author)
  • Skorodumova, Natalia V.KTH,Luleå tekniska universitet,Materialvetenskap,Department of Materials Science and Engineering, School of Industrial Engineering and Management, KTH–Royal Institute of Technology, 100 44 Stockholm, Sweden,Strukturer,Luleå Univ Technol, Dept Engn Sci & Math, Div Mat Sci, Appl Phys, S-97187 Luleå, Sweden.(Swepub:kth)u1x6ydfb (author)
  • Pasti, Igor A.University of Belgrade-Faculty of Physical Chemistry, 11158 Belgrade, Serbia,Univ Belgrade, Fac Phys Chem, Belgrade 11158, Serbia.(Swepub:kth)u1z425sr (author)
  • Lassnig, AliceErich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria,Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria. (author)
  • Griesser, ThomasInstitute of Chemistry of Polymeric Materials, Department of Polymer Engineering and Science, Montanuniversität Leoben, 8700 Leoben, Austria,Montan Univ Leoben, Inst Chem Polymer Mat, Dept Polymer Engn & Sci, A-8700 Leoben, Austria. (author)
  • Gammer, ChristophErich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria,Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria. (author)
  • Eckert, JuergenDepartment of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria,Montan Univ Leoben, Dept Mat Sci, A-8700 Leoben, Austria.;Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria. (author)
  • Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, AustriaMontan Univ Leoben, Dept Mat Sci, A-8700 Leoben, Austria. (creator_code:org_t)

Related titles

  • In:Nanomaterials: MDPI13:142079-4991

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