Physics – Condensed Matter – Materials Science
Scientific paper
2010-04-18
Physics
Condensed Matter
Materials Science
Scientific paper
This manuscript represents an investigation of structure, property and electrochemical activity for commercially available RuO2 coated titanium electrode, known as DSA. The investigation mainly aimed at XAS studies to understand the hidden structural information for RuO2. Two different (150 micron) and a (6 micron) titanium metal coated with RuO2 was exposed at ex-situ and in-situ XAS experiment to find out its electrocatalytic property and corrosion during chlorine generation reaction. A detailed survey of XANES and EXAFS showed that the stable RuO2 formed a nano cluster during chlorine generation reaction and these clusters produced a distorted rutile structure with an enhanced electrocatalytic activity. These nano clusters possibly the cause of generating surface heterogeneity of the present ruthenium dioxide material (active catalyst for DSA). With the help of electrochemical impedance spectroscopy we are able to detect the surface heterogeneity, this surface heterogeneity is having key role for outstanding electrochemical performance of these DSA electrodes.
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