AC Impedance tracking of glassy carbon activation
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Carbon materials, due to their physical and chemical properties, have found wide application in different electrochemical systems. They are often used as substrates for supercapacitors and different types of electrocatalysts. Upon activation, their electrochemical properties are improved. Glassy carbon can be successfully used as a model for studying the process of carbon activation. In this work, the activation of glassy carbon by electrochemical oxidation in sulfuric acid was investigated using cyclic voltammetry, electrochemical impedance spectroscopy and atomic force microscopy. Glassy carbon was oxidized during the same time at 5 different potentials. Cyclic voltammetry shows that the higher the potential the larger the increase in double layer capacitance is. Impedance measurements confirmed significant changes in capacitive response of activated glassy carbon in comparison to unoxidized state. AFM examination of treated GC surfaces revealed morphological changes and increase in ...roughness upon oxidation. If combined, the results of these studies show that the activation of glassy carbon proceeds through three stages: oxidation of active site, growing of graphite oxide layer and mechanical destruction of the surface.
Кључне речи:
Carbon materials / Activation of glassy carbon / Electrochemical oxidationИзвор:
Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings, 2010, 154-157Издавач:
- Serbian Chemical Society, Belgrade
Напомена:
- Belgrade, Serbia, June 6-10, 2010
- Related to the http://cer.ihtm.bg.ac.rs/handle/123456789/3540
Институција/група
IHTMTY - CONF AU - Stevanović, Sanja AU - Panić, Vladimir AU - Dekanski, Aleksandar AU - Jovanović, Vladislava M. PY - 2010 UR - http://www.aseee.eu/index.php/rsesee2-home UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3541 AB - Carbon materials, due to their physical and chemical properties, have found wide application in different electrochemical systems. They are often used as substrates for supercapacitors and different types of electrocatalysts. Upon activation, their electrochemical properties are improved. Glassy carbon can be successfully used as a model for studying the process of carbon activation. In this work, the activation of glassy carbon by electrochemical oxidation in sulfuric acid was investigated using cyclic voltammetry, electrochemical impedance spectroscopy and atomic force microscopy. Glassy carbon was oxidized during the same time at 5 different potentials. Cyclic voltammetry shows that the higher the potential the larger the increase in double layer capacitance is. Impedance measurements confirmed significant changes in capacitive response of activated glassy carbon in comparison to unoxidized state. AFM examination of treated GC surfaces revealed morphological changes and increase in roughness upon oxidation. If combined, the results of these studies show that the activation of glassy carbon proceeds through three stages: oxidation of active site, growing of graphite oxide layer and mechanical destruction of the surface. PB - Serbian Chemical Society, Belgrade C3 - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings T1 - AC Impedance tracking of glassy carbon activation SP - 154 EP - 157 UR - https://hdl.handle.net/21.15107/rcub_cer_3541 ER -
@conference{ author = "Stevanović, Sanja and Panić, Vladimir and Dekanski, Aleksandar and Jovanović, Vladislava M.", year = "2010", abstract = "Carbon materials, due to their physical and chemical properties, have found wide application in different electrochemical systems. They are often used as substrates for supercapacitors and different types of electrocatalysts. Upon activation, their electrochemical properties are improved. Glassy carbon can be successfully used as a model for studying the process of carbon activation. In this work, the activation of glassy carbon by electrochemical oxidation in sulfuric acid was investigated using cyclic voltammetry, electrochemical impedance spectroscopy and atomic force microscopy. Glassy carbon was oxidized during the same time at 5 different potentials. Cyclic voltammetry shows that the higher the potential the larger the increase in double layer capacitance is. Impedance measurements confirmed significant changes in capacitive response of activated glassy carbon in comparison to unoxidized state. AFM examination of treated GC surfaces revealed morphological changes and increase in roughness upon oxidation. If combined, the results of these studies show that the activation of glassy carbon proceeds through three stages: oxidation of active site, growing of graphite oxide layer and mechanical destruction of the surface.", publisher = "Serbian Chemical Society, Belgrade", journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings", title = "AC Impedance tracking of glassy carbon activation", pages = "154-157", url = "https://hdl.handle.net/21.15107/rcub_cer_3541" }
Stevanović, S., Panić, V., Dekanski, A.,& Jovanović, V. M.. (2010). AC Impedance tracking of glassy carbon activation. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings Serbian Chemical Society, Belgrade., 154-157. https://hdl.handle.net/21.15107/rcub_cer_3541
Stevanović S, Panić V, Dekanski A, Jovanović VM. AC Impedance tracking of glassy carbon activation. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings. 2010;:154-157. https://hdl.handle.net/21.15107/rcub_cer_3541 .
Stevanović, Sanja, Panić, Vladimir, Dekanski, Aleksandar, Jovanović, Vladislava M., "AC Impedance tracking of glassy carbon activation" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings (2010):154-157, https://hdl.handle.net/21.15107/rcub_cer_3541 .