Copper substrate as a catalyst for the oxidation of chemical vapor deposition-grown graphene

Journal Article · Wed Apr 15 04:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2014.02.021· OSTI ID:22475552

Li, Zhiting; Zhou, Feng; Parobek, David; Shenoy, Ganesh J.; Muldoon, Patrick; Liu, Haitao

We report the catalytic effect of copper substrate on graphene–oxygen reaction at high temperature. Previous studies showed that graphene grown on copper are mostly defect-free with strong oxidation resistance. We found that a freshly prepared copper-supported graphene sample can be completely oxidized in trace amount of oxygen (<3 ppm) at 600 °C within 2 h. Both X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) suggest that upon ambient air exposure, oxygen molecules diffuse into the space between graphene and copper, resulting in the formation of copper oxide which acts as catalytic sites for the graphene-oxygen reaction. This result has important implications for the characterization, processing, and storage of copper-supported graphene samples. - Graphical abstract: The copper substrate enhances the thermel oxidation of single-layer graphene. - Highlights: • A copper-supported graphene can be oxidized in Ar (O{sub 2}<3 ppm, 600 °C, 2 h). • O{sub 2} intercalates between graphene and copper upon exposure to air. • The copper foil should not be considered as an inert substrate.

• OSTI ID: 22475552
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 224; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AIR
ANNEALING
AUGER ELECTRON SPECTROSCOPY
CATALYSTS
CHEMICAL VAPOR DEPOSITION
CLATHRATES
COPPER
COPPER OXIDES
GRAPHENE
MOLECULES
OXIDATION
OXYGEN
SUBSTRATES
TEMPERATURE DEPENDENCE
TRACE AMOUNTS
X-RAY PHOTOELECTRON SPECTROSCOPY