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Materials, Vol. 11, Pages 893: Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Materials, Vol. 11, Pages 893: Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Materials doi: 10.3390/ma11060893

Authors: Valbonë Mehmeti Fetah I. Podvorica

The corrosion of two different metals, niobium and tantalum, in aqueous sulfuric acid solution has been studied in the presence and absence of carboxylated graphene oxide. Potentiodynamic measurements indicate that this nanomaterial inhibits corrosion due to its adsorption on the metal surfaces. The adsorbed layer of carboxylated graphene hinders two electrochemical reactions: the oxidation of the metal and the transport of metal ions from the metal to the solution but also hydrogen evolution reaction by acting as a protective barrier. The adsorption behavior at the molecular level of the carboxylated graphene oxide with respect to Nb, NbO, Ta, and TaO (111) surfaces is also investigated using Molecular Dynamic and Monte Carlo calculations.

Authors:   Mehmeti, Valbonë ; Podvorica, Fetah I.
Journal:   Materials
Volume:   11
edition:   6
Year:   2018
Pages:   893
DOI:   10.3390/ma11060893
Publication date:   26-May-2018
Facts, background information, dossiers
  • hydrogen
  • graphene oxide
  • electrochemical reactions
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