Abstract
SUMMARYThe electrocatalytic performance of RuO2 films depends on their chemical composition, structure and surface morphology. In the present paper the structure and morphology of RuO2 thermally formed on a titanium support in air. oxygen and argon were characterised using HRSEM. XRD and XPS. Both XRD and XPS results show that the ruthenium catalyst film thermally formed in different atmospheres was not composed of stoichiometric RuO2, but was a Ru (IV) (rutile type) structure highly deficient in oxygen. HRSEM revealed that ultra-fine particles existed along both flat planes and cracks and their size was dependent on the calcination environment. The in situ techniques voltammetry and a.c. impedance applied within the “double layer” region revealed that the activity of the electrodes thermally formed in different atmospheres is directly related to their ultrafine particle size. These measurements confirmed that the double layer capacitance is augmented by a pseudocapacitance due to redox processes. The maturation of the electrodes is probably related to the progressive hydration of the calcined oxide surfaces.
Sign-in/Register to access full text options 
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.
