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Issue 26, 2016
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Failure of multi-layer graphene coatings in acidic media

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Being impermeable to all gases, graphene has been proposed as an effective ultrathin barrier film and protective coating. However, here it is shown how the gastight property of graphene-based coatings may indirectly lead to their catastrophic failure under certain conditions. When nickel coated with thick, high-quality chemical vapor deposited multilayered graphene is exposed to acidic solutions, a dramatic evolution of gas is observed at the coating–substrate interface. The gas bubbles grow and merge, eventually rupturing and delaminating the coating. This behavior, attributed to cathodic hydrogen evolution, can also occur spontaneously on a range of other technologically important metals and alloys based on iron, zinc, aluminum and manganese; this makes these findings relevant for practical applications of graphene-based coatings.

Graphical abstract: Failure of multi-layer graphene coatings in acidic media

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The article was received on 18 Jan 2016, accepted on 15 Feb 2016 and first published on 17 Feb 2016

Article type: Paper
DOI: 10.1039/C6RA01556E
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Citation: RSC Adv., 2016,6, 21497-21502

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    Failure of multi-layer graphene coatings in acidic media

    F. Yu, A. C. Stoot, P. Bøggild and L. Camilli, RSC Adv., 2016, 6, 21497
    DOI: 10.1039/C6RA01556E

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