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http://dx.doi.org/10.5229/JKES.2013.16.2.70

Study on Electrocatalytic Water Oxidation Reaction by Iridium Oxide and Its Bubble Overpotential Effect  

Kim, Jeong Joong (Department of Chemistry, Konkuk University)
Choi, Yong Soo (Department of Chemistry, Konkuk University)
Kwon, Seong Jung (Department of Chemistry, Konkuk University)
Publication Information
Journal of the Korean Electrochemical Society / v.16, no.2, 2013 , pp. 70-73 More about this Journal
Abstract
Iridium oxide is well known as an electrocatalyst for the water oxidation. Recently, Dr. Bard's group observed the electrocatalytic behavior of individual nanoparticle of Iridium oxide using the electrochemical amplification method by detecting the single nanoparticle collisions at the ultramicroelectrode (UME). However, the electrocatalytic current is decayed as a function of time. In this study, we investigated that the reason of electrocatalytic current decay of water oxidation at Iridium oxide nanoparticles. We identified it is due to the bubble overpotential because the cyclic current decay and recovery were synchronized to the oxygen bubble growth and coming away from an Iridium disk electrode.
Keywords
Bubble overpotential; Electrocatalyst; Iridium oxide; Water oxidation;
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1 P. G. Hoertz, Y. I. Kim, W. J. Youngblood, and T. E. Mallouk, 'Bidentate Dicarboxylate Capping Groups and Photosensitizers Control the Size of $IrO_2$ Nanoparticle Catalysts for Water Oxidation' J. Phys. Chem. B, 111, 6845 (2007).   DOI   ScienceOn
2 T. Nakagawa, C. A. Beasley, and R. W. Murray, 'Efficient Electro-Oxidation of Water near Its Reversible Potential by a Mesoporous $IrO_x$ Nanoparticle Film' J. Phys. Chem. C, 113, 12958 (2009).   DOI   ScienceOn
3 M. Yagi, E. Tomita, S. Sakita, T. Kuwabara, and K. Nagai, 'Self-assembly of active $IrO_2$ colloid catalyst on an ITO electrode for efficient electrocatalytic water oxidation' J. Phys. Chem. B, 109, 21489 (2005).   DOI   ScienceOn
4 X. Xiao and A. J. Bard 'Observing Single Nanoparticle Collisions at an Ultramicroelectrode by Electrocatalytic Amplification' J. Am. Chem. Soc., 129, 9610 (2007).   DOI   ScienceOn
5 S. J. Kwon, F-R. F. Fan, and A. J. Bard, 'Observing Iridium Oxide (IrOx) Single Nanoparticle Collisions at Ultramicroelectrodes' J. Am. Chem. Soc., 132, 13165 (2010).   DOI   ScienceOn
6 S. J. Kwon and A. J. Bard, 'Analysis of Diffusion-Controlled Stochastic Events of Iridium Oxide Single Nanoparticle Collisions by Scanning Electrochemical Microscopy' J. Am. Chem. Soc., 134, 7102 (2012).   DOI   ScienceOn
7 T. Kuwabara, E. Tomita, S. Sakita, D. Hasegawa, K. Sone, and M. Yagi, 'Characterization and Analysis of Self-Assembly of a Highly Active Colloidal Catalyst for Water Oxidation onto Transparent Conducting Oxide Substrates' J. Phys. Chem. C, 112, 3774 (2008).   DOI   ScienceOn
8 M. Hara, C. C. Waraksa, J. T. Lean, B. A. Lewis, and T. E. Mallouk, 'Photocatalytic Water Oxidation in a Buffered Tris(2,2'-bipyridyl)ruthenium Complex-Colloidal $IrO_2$ System' J. Phys. Chem. A, 104, 5275 (2000).   DOI   ScienceOn
9 S. J. Kwon, H. Zhou, F-R. F. Fan, V. Vorobyev, B. Zhang, and A. J. Bard, 'Stochastic electrochemistry with electrocatalytic nanoparticles at inert ultramicroelectrodestheory and experiments' Phys. Chem. Chem. Phys., 13, 5394 (2011).   DOI   ScienceOn
10 J. Eigeldinger and H. Vogt, 'The bubble coverage of gasevolving electrodes in a flowing electrolyte' Electrochim. Acta., 45, 4449 (2000).   DOI   ScienceOn
11 C. Gabrielli, F. Huet, M. Keddam, A. Macias, and A. Sahar, 'Potential drops due to an attached bubble on a gasevolving electrode' J. Appl. Eletrochem., 19, 617 (1989).   DOI