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Issue 14, 2016

A long-term corrosion barrier with an insulating boron nitride monolayer

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Abstract

Graphene has been demonstrated as an ultrathin and light-weight corrosion barrier because of its high impermeability. However, it fails to prevent the Cu corrosion over a long term because the high conductivity of graphene enables the formation of a galvanic cell and promotes the electrochemical reaction. Here we theoretically and experimentally study a boron nitride (BN) monolayer as a long-term corrosion barrier for Cu. Our density functional theory calculations show that the potential barrier for O2 to pass through BN is close to that of graphene. The long-term barrier characteristics of BN and graphene are comparably evaluated by aging in an ambient environment for 160 days. Morphological and spectroscopic characterization shows that a BN monolayer has much better long-term barrier performance than graphene. X-ray photoelectron spectroscopy analysis shows that the Cu2+ percentage of the aging Cu sample with a BN barrier is reduced by around 15 times compared with that covered by graphene. The superior long-term barrier performance of a BN monolayer can be understood to be a result of its high impermeability and insulating characteristics, which suppress the galvanic corrosion under the ambient environment. These studies reveal that a BN monolayer is a more effective long-term corrosion barrier than graphene.

Graphical abstract: A long-term corrosion barrier with an insulating boron nitride monolayer

Supplementary files

Article information


Submitted
23 Feb 2016
Accepted
14 Mar 2016
First published
14 Mar 2016

This article is Open Access

J. Mater. Chem. A, 2016,4, 5044-5050
Article type
Communication

A long-term corrosion barrier with an insulating boron nitride monolayer

L. Shen, Y. Zhao, Y. Wang, R. Song, Q. Yao, S. Chen and Y. Chai, J. Mater. Chem. A, 2016, 4, 5044 DOI: 10.1039/C6TA01604A

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