Fabrication of anti-corrosion nitrogen doped graphene oxide coatings by electrophoretic deposition - Publication - Bridge of Knowledge

Search

Fabrication of anti-corrosion nitrogen doped graphene oxide coatings by electrophoretic deposition

Abstract

This work assesses anti-corrosion properties of graphene and N-doped graphene coatings deposited on copper by an electrophoretic method. Graphene oxide (GO) precursor was synthesized by an improved Hummers' method, whereas N-doping was performed hydrothermally in the presence of ammonia. After nitrogenation, doped graphene oxide samples (NGO) contained a reduced amount of oxygen and about 9% w/w nitrogen as pyridinic, pyrrole, and graphitic groups. Nevertheless, it was possible to obtain a stable aqueous dispersion of NGOs, a prerequisite for the EPD process. According to SEM images, the EPD coatings were compact with minor defects. On the contrary, GO coating possessed cracks and large pores that resulted from gas evolution during electrolysis. Electrochemical studies showed that all coatings prevented copper from corrosion in saline solution, however, the nitrogenated coatings did not exhibit better anti-corrosion properties than reduced graphene oxide coating. A reasonable explanation of this finding is that some positive properties of the nitrogenated coatings, in terms of anti-corrosion action, like low hydrophilicity and good adhesion, were counteracted by their catalytic activity towards oxygen reduction reaction.

Citations

  • 3 0

    CrossRef

  • 0

    Web of Science

  • 3 3

    Scopus

Cite as

Full text

full text is not available in portal

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
APPLIED SURFACE SCIENCE no. 499, pages 1 - 7,
ISSN: 0169-4332
Language:
English
Publication year:
2020
Bibliographic description:
Ollik K., Rybarczyk M., Karczewski J., Lieder M.: Fabrication of anti-corrosion nitrogen doped graphene oxide coatings by electrophoretic deposition// APPLIED SURFACE SCIENCE -Vol. 499, (2020), s.1-7
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2019.143914
Verified by:
Gdańsk University of Technology

seen 249 times

Recommended for you

Meta Tags