Oxidation of Sputtered Deposited Carbon Studied by Electrochemical Quartz Crystal Microbalance

Abstract

The oxidation behavior of a sputtered carbon electrode has been investigated in 0.5 M H2SO4 solution with the help of an electrochemical quartz crystal microbalance (EQCM). The mass change response of the carbon coated Au-QCM during potential cycling showed an increase of mass due to adsorption of water or bisulfate ion just after observation of an anodic peak for the oxidation of hydroquinone. A mass loss due probably to the evolution of CO2 gas was observed at potential above 1.3 V vs. SHE during anodic scan. During cathodic scan, a loss of mass due to release of water or bisulfate ion was accompanied by the reduction of quinone to hydroquinone. DOI: http://dx.doi.org/10.3126/jncs.v28i0.8111 Journal of Nepal Chemical Society Vol. 28, 2011 Page: 80-83 Uploaded Date: May 24, 2013