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Published on: February 11, 2016
The CdIn2 S4 /WO3 Nanosheet Composite Has a Significantly Enhanced Photo-electrochemical Cathodic Protection
Yuying Yang1,2,3,4, Zhuoyuan Chen1,5,2,3, Chang Feng1,2,4
1Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, P. R. China.
Abstract:
Photo-electrochemical cathodic protection (CP) technology is considered to be a green metallic corrosion protection technology that uses solar energy to protect from corrosion and does not consume any anode materials. In this work, a CdIn2 S4 /WO3 nanocomposite photoelectrode was prepared, and its photo-electrochemical CP performance and mechanism were studied and analyzed. WO3 has a well band matching with CdIn2 S4 , leading to a significantly enhanced photo-electrochemical CP performance of the nanocomposite. Meanwhile, as confirmed in this work, the CdIn2 S4 /WO3 nanocomposite can store photoinduced electrons under light illumination through intercalation reactions and changing the valence state of tungsten. Moreover, it can discharge in the dark state to provide continuous CP for the coupled metals. This research will promote the practical application process of the photo-electrochemical CP technology.
