Microstructural impact of anodic coatings on the electrochemical chlorine 
evolution reaction

Chen, Ruiyong; Trieu, Vinh; Zeradjanin, Aleksandar R.; Natter, Harald; Teschner, Detre; Kintrup, Jürgen; Bulan, Andreas; Schuhmann, Wolfgang; Hempelmann, Rolf

doi:10.1039/C2CP41163F

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Microstructural impact of anodic coatings on the electrochemical chlorine evolution reaction

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Teschner, Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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引用

Chen, R., Trieu, V., Zeradjanin, A. R., Natter, H., Teschner, D., Kintrup, J., Bulan, A., Schuhmann, W., & Hempelmann, R. (2012). Microstructural impact of anodic coatings on the electrochemical chlorine evolution reaction. Physical Chemistry Chemical Physics, 14(20), 7392-7399. doi:10.1039/C2CP41163F.

引用: https://hdl.handle.net/11858/00-001M-0000-000F-8561-F

要旨

Sol-gel Ru0.3Sn0.7O2 electrode coatings with crack-free and mud-crack surface morphology deposited onto a Ti-substrate are prepared for a comparative investigation of the microstructural effect on the electro- chemical activity for Cl2 production and the Cl2 bubble evolution behavior. For comparison, a state-of-the-art mud-crack commercial Ru0.3Ti0.7O2 coating is used. The compact coating is potentially durable on a long term compared to the mud-crack coating due to the reduced penetration of electrolyte. Ti L-edge X-ray absorption spectroscopy confirms that a TiOx interlayer is formed between the mud-crack Ru0.3Sn0.7O2 coating and the underlying Ti-substrate due to the attack of the electrolyte. Meanwhile, the compact coating shows enhanced activity in comparison to the commercial coating, benefiting from the nano particle nanoporosityarchitecture.Thedependenceoftheoverallelectrodepolarizationbehaviouron the local activity and the bubble evolution behavior for the Ru0.3Sn0.7O2 coatings with different surface microstructure are evaluated by means of scanning electrochemical microscopy and microscopic bubble