In situ videometry monitoring of bubble behavior during the electrocatalytic oxygen evolution reaction
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Abstract
Cyclic voltammetry (CV) on rotating Pt disc electrode was used for electrocatalytic oxidation of OH−. Hydroxide ion oxidation is followed by oxygen evolution with gas bubble formation. The image analysis was performed in situ in order to find correlation between bubbles related phenomena and the current of OH− oxidation. Bubble formation was tested in four different regimes having different scan rate and/or electrode rotation rate. The videometry using high speed camera was applied to observe the bubble related phenomena. The integral effect of presence of bubbles was analyzed. The fast Fourier transformation and normalized power spectra were used for advanced image analysis. Using this type of analysis, two different characteristic periodical behaviors were reported for the first time. The obtained periods were in accordance with scan rate and electrode rotation rate. The former periodic component of bubble formation process was correlated with well defined CV cycles, and hence, related to electrocatalytic oxidation–reduction of OH−. The other periodic component of bubble behavior induced by rotation rate (600 rpm) was shifted from 0.01 s toward slightly higher values probably due to hydrodynamic conditions in the investigated system.
Keywords
Electrocatalysis Oxygen evolution reaction In situ videometry Image analysisNotes
Acknowledgments
This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Project Nos. III 45001, ON 172015 and ON 171008).
Supplementary material
References
- 1.Bockris JO’M, Khan SUM (1993) Surface electrochemistry: a molecular level approach. Planum Press, New YorkCrossRefGoogle Scholar
- 2.Bockris JO’M (1956) J Chem Phys. 24:817–827CrossRefGoogle Scholar
- 3.Krasil’shchikov AI (1963) Zh Fiz Khim 37:531–537Google Scholar
- 4.Damjanović A, Dey A, Bockris JO’M (1966) Electrochim Acta 11:791–814CrossRefGoogle Scholar
- 5.Cheng H, Scott K, Ramshaw C (2002) J Electrochem Soc 149:D172–D177CrossRefGoogle Scholar
- 6.Abdelsalam ME, Denuault G, Baldo MA, Daniele S (1998) J Electroanal Chem 449:5–7CrossRefGoogle Scholar
- 7.Ciani I, Daniele SJ (2004) J Electroanal Chem 564:133–140CrossRefGoogle Scholar
- 8.Daniele S, Baldo MA, Bragato C (2002) Anal Chem 74:3290–3296CrossRefGoogle Scholar
- 9.Abdelsalam ME, Denuault G, Baldo MA, Bragato C, Daniele S (2001) Electroanal 13:289–294CrossRefGoogle Scholar
- 10.Tsang PKS, Cofré P, Saweyer DT (1987) Inorg Chem 26:3604–3609CrossRefGoogle Scholar
- 11.Sinobad T, Obradović-Đuričić K, Nikolić Z, Dodić S, Sinobad Lazić V, Jesenko-Rokvić A (2014) Vojnosanit Pregl 71:251–258CrossRefGoogle Scholar
- 12.Jakšić ZM, Vrhovac SB, Panić BM, Nikolić Z, Jelenković BM (2008) Eur Phys J E 27:345–356CrossRefGoogle Scholar
- 13.Bard AJ, Faulkner LR (2001) Electrochem Methods. wiley, New YorkGoogle Scholar
- 14.Riddiford AC (1961) Electrochim Acta 4:170–178CrossRefGoogle Scholar
- 15.Conway BE, Liu TC (1990) Langmuir 6:268–276CrossRefGoogle Scholar