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

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Abstract

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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Supplementary files

Article information


Submitted
18 Jan 2016
Accepted
15 Feb 2016
First published
17 Feb 2016

RSC Adv., 2016,6, 21497-21502
Article type
Paper
Author version available

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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