Abstract
The tribochemical reaction of ethanol on oxidized nickel surfaces was studied using gas chromatography, XPS, and exoelectron emission (EEE) and surface potential (SP) measurements. Ametal surface intentionally oxidized by heating in air at 25-800°C was rubbed with the same metal sample in ethanol vapor. EEE was measured using a Geiger counter with Ar-C2H5OH counter gas. SP was measured by a vibrating reed electrometer. Two gaseous products formed with and without friction--acetaldehyde (A) and an unidentified species (B) containing a carbonyl group. Friction increased products and EEE. Products tended to increase with EEE regardless of friction. Product formation was accompanied by carbon deposition. SP for surfaces oxidized at higher temperatures was negative, but after the reaction increased positively due to carbon deposition. The change in SP correlates with the activated tribochemical reaction, EEE appears to originate when negative charge on the oxidized surface is released due to the reduction by ethanol.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
