Corrosion inhibition and photoactivity behavior of N-substituted polycarbazole-coated natural pyrite electrode

Conductive films of poly (N-vinylcarbazole) (PVCz) and polycarbazole (PCz) were coated electrochemically on a natural iron sulfide (FeS2) surface. The corrosion, photocorrosion, and photoactivity characteristics of coated ele ctrodes were investigated in potassium iodide/iodide (KI/I-2) redox electro lyte. However, PVCz was obtained by oxidative poly merization of N-vinylcar bazole (NVCz) by eerie ammonium nitrate (CAN) and showed photoconductivity also was deposited on the natural FeS2 surface chemically from toluene/cycl ohegzanone solution, and the electrode was tested for photoactivity. Electr ochemical coating inhibited corrosion and photocorrosion of FeS2 causing so me decrease in photoactivity, while chemical coating of thin, transparent P VCz on the surface enhanced the photoactivity and inhibited the corrosion a nd photocorrosion.